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19-0248; Rev 1; 6/09
KIT ATION EVALU LE B AVAILA
High-Linearity, 650MHz to 1000MHz Upconversion/ Downconversion Mixer with LO Buffer/Switch
General Description
The MAX2031 high-linearity passive upconverter or downconverter mixer is designed to provide +36dBm IIP3, 7dB NF, and 7dB conversion loss for a 650MHz to 1000MHz RF frequency range to support GSM/cellular base-station transmitter or receiver applications. With a 650MHz to 1250MHz LO frequency range, this particular mixer is ideal for high-side LO injection architectures. For a pin-to-pin-compatible mixer meant for low-side LO injection, refer to the MAX2029. In addition to offering excellent linearity and noise performance, the MAX2031 also yields a high level of component integration. This device includes a doublebalanced passive mixer core, a dual-input LO selectable switch, and an LO buffer. On-chip baluns are also integrated to allow for a single-ended RF input for downconversion (or RF output for upconversion), and single-ended LO inputs. The MAX2031 requires a nominal LO drive of 0dBm, and supply current is guaranteed to be below 100mA. The MAX2031 is pin compatible with the MAX2039/ MAX2041 1700MHz to 2200MHz mixers, making this family of passive upconverters and downconverters ideal for applications where a common PC board layout is used for both frequency bands. The MAX2031 is available in a compact 20-pin thin QFN package (5mm x 5mm) with an exposed pad. Electrical performance is guaranteed over the extended -40C to +85C temperature range.
Features
o 650MHz to 1000MHz RF Frequency Range o 650MHz to 1250MHz LO Frequency Range o 570MHz to 900MHz LO Frequency Range (Refer to the MAX2029 Data Sheet) o DC to 250MHz IF Frequency Range o 7dB Conversion Loss o +36dBm Input IP3 o +27dBm Input 1dB Compression Point o 7dB Noise Figure o Integrated LO Buffer o Integrated RF and LO Baluns o Low -3dBm to +3dBm LO Drive o Built-In SPDT LO Switch with 49dB LO1 to LO2 Isolation and 50ns Switching Time o Pin Compatible with the MAX2039/MAX2041 1700MHz to 2200MHz Mixers o External Current-Setting Resistor Provides Option for Operating Mixer in Reduced-Power/ReducedPerformance Mode
MAX2031
Ordering Information
PART MAX2031ETP+ MAX2031ETP+T TEMP RANGE -40C to +85C -40C to +85C PIN-PACKAGE 20 Thin QFN-EP* 20 Thin QFN-EP*
Applications
WCDMA/LTE and cdma2000 (R) Base Stations GSM 850/GSM 900 2G and 2.5G EDGE Base Stations Integrated Digital Enhanced Network (iDEN(R)) Base Stations WiMAX(SM) Base Stations and Customer Premise Equipment Predistortion Receivers Microwave and Fixed Broadband Wireless Access Wireless Local Loop Digital and SpreadSpectrum Communication Systems
+Denotes a lead(Pb)-free/RoHS-compliant package. T= Tape and reel. *EP = Exposed pad.
Pin Configuration/ Functional Diagram
GND GND 17
TOP VIEW
+ VCC RF TAP GND GND
20
19
18
16
GND
IF+
IF-
1 2 3 4 E.P. 5
15
LO2 VCC GND GND LO1
MAX2031
14 13 12 11
6 VCC
7 LOBIAS
8 VCC
9 LOSEL
10 GND
cdma2000 is a registered trademark of Telecommunications Industry Association. iDEN is a registered trademark of Motorola, Inc. WiMAX is a trademark of WiMAX Forum.
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.
High-Linearity, 650MHz to 1000MHz Upconversion/ Downconversion Mixer with LO Buffer/Switch MAX2031
ABSOLUTE MAXIMUM RATINGS
VCC to GND ...........................................................-0.3V to +5.5V RF (RF is DC shorted to GND through a balun)..................50mA LO1, LO2 to GND ..................................................-0.3V to +0.3V IF+, IF- to GND ...........................................-0.3V to (VCC + 0.3V) TAP to GND ...........................................................-0.3V to +1.4V LOSEL to GND ...........................................-0.3V to (VCC + 0.3V) LOBIAS to GND..........................................-0.3V to (VCC + 0.3V) RF, LO1, LO2 Input Power (Note 1) ...............................+20dBm Continuous Power Dissipation (Note 2)....................................5W jA (Notes 3, 4)...............................................................+38C/W jC (Notes 2, 3) ..............................................................+13C/W Operating Temperature Range (Note 5) .....TC = -40C to +85C Junction Temperature ......................................................+150C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10s) .................................+300C
Note 1: Maximum, reliable, continuous input power applied to the RF and IF port of this device is +12dBm from a 50 source. Note 2: Based on junction temperature TJ = TC + (JC x VCC x ICC). This formula can be used when the temperature of the exposed pad is known while the device is soldered down to a PCB. See the Applications Information section for details. The junction temperature must not exceed +150C. Note 3: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a fourlayer board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial. Note 4: Junction temperature TJ = TA + (JA x VCC x ICC). This formula can be used when the ambient temperature of the PCB is known. The junction temperature must not exceed +150C. Note 5: TC is the temperature on the exposed pad of the package. TA is the ambient temperature of the device and PCB.
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
DC ELECTRICAL CHARACTERISTICS
(Typical Application Circuit, VCC = 4.75V to 5.25V, no RF signals applied, TC = -40C to +85C. IF+ and IF- are DC grounded through an IF balun. Typical values are at VCC = 5V, TC = +25C, unless otherwise noted.)
PARAMETER Supply Voltage Supply Current LOSEL Input-Logic Low LOSEL Input-Logic High SYMBOL VCC ICC VIL VIH 2 CONDITIONS MIN 4.75 TYP 5.00 85 MAX 5.25 100 0.8 UNITS V mA V V
RECOMMENDED AC OPERATING CONDITIONS
PARAMETER SYMBOL CONDITIONS Components tuned for the 700MHz band (Table 1), C1 = 7pF, C5 = 3.3pF (Notes 6, 7) RF Frequency fRF Components tuned for the 800MHz/900MHz cellular band (Table 1), C1 = 82pF, C5 = 2.0pF (Note 6) (Notes 6, 7) IF frequency range depends on external IF transformer selection (Note 6) MIN 650 TYP MAX 850 MHz 800 650 0 -3 1000 1250 250 +3 MHz MHz dBm UNITS
LO Frequency IF Frequency LO Drive Level
fLO fIF PLO
2
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High-Linearity, 650MHz to 1000MHz Upconversion/ Downconversion Mixer with LO Buffer/Switch
AC ELECTRICAL CHARACTERISTICS (800MHz/900MHz CELLULAR BAND DOWNCONVERTER OPERATION)
(Typical Application Circuit, optimized for the 800MHz/900MHz cellular band (see Table 1), C1 = 82pF, C5 = 2pF, L1 and C4 not used, VCC = 4.75V to 5.25V, RF and LO ports driven from 50 sources, PLO = -3dBm to +3dBm, PRF = 0dBm, fRF = 815MHz to 1000MHz, fLO = 960MHz to 1180MHz, fIF = 160MHz, fLO > fRF, TC = -40C to +85C, unless otherwise noted. Typical values are at VCC = 5V, PRF = 0dBm, PLO = 0dBm, fRF = 910MHz, fLO = 1070MHz, fIF = 160MHz, TC = +25C, unless otherwise noted.) (Note 8)
PARAMETER Conversion Loss SYMBOL Lc Flatness over any one of three frequency bands (fIF = 160MHz): fRF = 827MHz to 849MHz fRF = 869MHz to 894MHz fRF = 880MHz to 915MHz TC = +25C to -40C TC = +25C to +85C P1dB IIP3 (Note 9) fRF1 = 910MHz, fRF2 = 911MHz, PRF = 0dBm/tone, fLO = 1070MHz, PLO = 0dBm, TC = +25C (Note 10) TC = +25C to -40C TC = +25C to +85C 2LO - 2RF 3LO - 3RF Single sideband PBLOCKER = +8dBm PBLOCKER = +12dBm LO2 selected, PLO = +3dBm, TC = +25C LO1 selected, PLO = +3dBm, TC = +25C PLO = +3dBm PLO = +3dBm 50% of LOSEL to IF, settled within 2 degrees 42 42 32 CONDITIONS MIN TYP 7.0 MAX UNITS dB
MAX2031
Conversion Loss Flatness
0.18
dB
Conversion Loss Variation Over Temperature Input Compression Point Input Third-Order Intercept Point Input IP3 Variation Over Temperature Spurious Response at IF Noise Figure Noise Figure Under Blocking (Note 11) LO1-to-LO2 Isolation (Note 10) Maximum LO Leakage at RF Port Maximum LO Leakage at IF Port LO Switching Time Minimum RF-to-IF Isolation RF Port Return Loss
-0.3 0.2 27 36 0.3 -0.3 72 79 7.0 15 19 51 49 -27 -35 50 45 17
dB dBm dBm
IIP3 2x2 3x3 NF
dB dBc dB dB dB dBm dBm ns dB dB
LO Port Return Loss
LO1/LO2 port selected, LO2/LO1, RF, and IF terminated into 50 LO1/LO2 port unselected, LO2/LO1, RF, and IF terminated into 50 LO driven at 0dBm, RF terminated into 50
28 dB 30 17 dB
IF Port Return Loss
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3
High-Linearity, 650MHz to 1000MHz Upconversion/ Downconversion Mixer with LO Buffer/Switch MAX2031
AC ELECTRICAL CHARACTERISTICS (700MHz BAND DOWNCONVERTER OPERATION)
(Typical Application Circuit, optimized for the 700MHz band (see Table 1), C1 = 7pF, C5 = 3.3pF, L1 and C4 are not used, VCC = 4.75V to 5.25V, RF and LO ports driven from 50 sources, PLO = -3dBm to +3dBm, PRF = 0dBm, fRF = 650MHz to 850MHz, fLO = 790MHz to 990MHz, fIF = 140MHz, fLO > fRF, TC = +25C, unless otherwise noted. Typical values are at VCC = 5V, PRF = 0dBm, PLO = 0dBm, fRF = 750MHz, fLO = 890MHz, fIF = 140MHz, TC = +25C, unless otherwise noted.) (Notes 8, 10)
PARAMETER Conversion Loss Input 1dB Compression Point Input Third-Order Intercept Point LO Leakage at IF Port LO Leakage at RF Port RF-to-IF Isolation 2LO-2RF Spurious Response 3LO-3RF Spurious Response 2x2 3x3 SYMBOL LC P1dB IIP3 fRF = 750MHz, PRF = 0dBm, PLO = 0dBm fRF1 = 749MHz, fRF2 = 750MHz, fLO = 890MHz, PRF = 0dBm/tone, PLO = 0dBm PLO = +3dBm PLO = +3dBm 36 40 65 32 CONDITIONS MIN 6.1 TYP 6.9 27.7 37 -33 -20 49 72 82 -21 -13 MAX 8.1 UNITS dB dBm dBm dBm dBm dB dBc dBc
AC ELECTRICAL CHARACTERISTICS (UPCONVERTER OPERATION)
(Typical Application Circuit, L1 = 4.7nH, C4 = 6pF, C1 = 82pF, C5 not used, VCC = 4.75V to 5.25V, RF and LO ports are driven from 50 sources, PLO = -3dBm to +3dBm, PIF = 0dBm, fRF = 815MHz to 1000MHz, fLO = 960MHz to 1180MHz, fIF = 160MHz, fLO > fRF, TC = -40C to +85C, unless otherwise noted. Typical values are at VCC = 5V, PIF = 0dBm, PLO = 0dBm, fRF = 910MHz, fLO = 1070MHz, fIF = 160MHz, TC = +25C, unless otherwise noted.) (Note 8)
PARAMETER Conversion Loss SYMBOL Lc Flatness over any one of three frequency bands (fIF = 160MHz): fRF = 827MHz to 849MHz fRF = 869MHz to 894MHz fRF = 880MHz to 915MHz TC = +25C to -40C TC = +25C to +85C P1dB IIP3 (Note 9) fIF1 = 160MHz, fIF2 = 161MHz, PIF = 0dBm/tone, fLO = 1070MHz, PLO = 0dBm, TC = +25C (Note 10) TC = +25C to -40C TC = +25C to +85C 32 CONDITIONS MIN TYP 7.4 MAX UNITS dB
Conversion Loss Flatness
0.3
dB
Conversion Loss Variation Over Temperature Input Compression Point Input Third-Order Intercept Point Input IP3 Variation Over Temperature LO 2IF Spur LO 3IF Spur Output Noise Floor
-0.3 0.4 27 36 1.2 -0.9 64 83
dB dBm dBm
IIP3
dB dBc dBc dBm/Hz
POUT = 0dBm (Note 11)
-167
Note 6: Note 7: Note 8: Note 9: Note 10: Note 11:
Operation outside this range is possible, but with degraded performance of some parameters. Not production tested. All limits include external component losses. Output measurements are taken at IF or RF port of the Typical Application Circuit. Compression point characterized. It is advisable not to continuously operate the mixer RF/IF inputs above +12dBm. Guaranteed by design. Measured with external LO source noise filtered, so its noise floor is -174dBm/Hz. This specification reflects the effects of all SNR degradations in the mixer, including the LO noise as defined in Application Note 2021: Specifications and Measurements of Local Oscilator Noise in Integrated Circuit Base Station Mixers.
4
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High-Linearity, 650MHz to 1000MHz Upconversion/ Downconversion Mixer with LO Buffer/Switch MAX2031
Typical Operating Characteristics
(Typical Application Circuit, optimized for the 800MHz/900MHz cellular band (see Table 1), C1 = 82pF, C5 = 2pF, L1 and C4 not used, VCC = 5.0V, PLO = 0dBm, PRF = 0dBm, fLO > fRF, fIF = 160MHz, TC = +25C, unless otherwise noted.)
Downconverter Curves
CONVERSION LOSS vs. RF FREQUENCY
MAX2031 toc01
CONVERSION LOSS vs. RF FREQUENCY
MAX2031 toc02
CONVERSION LOSS vs. RF FREQUENCY
MAX2031 toc03
10
10
10
9 CONVERSION LOSS (dB) TC = +85C TC = -25C TC = +25C
9 CONVERSION LOSS (dB) PLO = -3dBm, 0dBm, +3dBm
9 CONVERSION LOSS (dB) VCC = 4.75V, 5.0V, 5.25V
8
8
8
7
7
7
6
TC = -40C
6
6
5 800 850 900 950 1000 RF FREQUENCY (MHz)
5 800 850 900 950 1000 RF FREQUENCY (MHz)
5 800 850 900 950 1000 RF FREQUENCY (MHz)
INPUT IP3 vs. RF FREQUENCY
MAX2031 toc04
INPUT IP3 vs. RF FREQUENCY
PRF = 0dBm/TONE PLO = +3dBm
MAX2031 toc05
INPUT IP3 vs. RF FREQUENCY
PRF = 0dBm/TONE VCC = 5.25V
MAX2031 toc06
40 38 36 34
PRF = 0dBm/TONE
40 38 36 34 32 30 28 26
40 38 36 34
TC = +85C, +25C
PLO = 0dBm
INPUT IP3 (dBm)
INPUT IP3 (dBm)
TC = -40C 32 TC = -25C 30 28 26 800 850 900 950 RF FREQUENCY (MHz) 1000
PLO = -3dBm
INPUT IP3 (dBm)
VCC = 4.75V 32 30 28 26
VCC = 5.0V
800
850 900 950 RF FREQUENCY (MHz)
1000
800
850 900 950 RF FREQUENCY (MHz)
1000
NOISE FIGURE vs. RF FREQUENCY
MAX2031 toc07
NOISE FIGURE vs. RF FREQUENCY
MAX2031 toc08
NOISE FIGURE vs. RF FREQUENCY
MAX2031 toc09
10
10
10
9 TC = +25C NOISE FIGURE (dB) 8 TC = +85C
9 NOISE FIGURE (dB)
9 NOISE FIGURE (dB)
8
8
7
7 PLO = -3dBm, 0dBm, +3dBm 6
7 VCC = 4.75V, 5.0V, 5.25V 6
6 TC = -40C 5 800 850 900 950 1000 RF FREQUENCY (MHz) TC = -25C
5 800 850 900 950 1000 RF FREQUENCY (MHz)
5 800 850 900 950 1000 RF FREQUENCY (MHz)
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5
High-Linearity, 650MHz to 1000MHz Upconversion/ Downconversion Mixer with LO Buffer/Switch MAX2031
Typical Operating Characteristics (continued)
(Typical Application Circuit, optimized for the 800MHz/900MHz cellular band (see Table 1), C1 = 82pF, C5 = 2pF, L1 and C4 not used, VCC = 5.0V, PLO = 0dBm, PRF = 0dBm, fLO > fRF, fIF = 160MHz, TC = +25C, unless otherwise noted.)
Downconverter Curves
2LO - 2RF RESPONSE vs. RF FREQUENCY
MAX2031 toc10
2LO - 2RF RESPONSE vs. RF FREQUENCY
MAX2031 toc11
2LO - 2RF RESPONSE vs. RF FREQUENCY
PRF = 0dBm VCC = 4.75V, 5.0V
MAX2031 toc12
95
PRF = 0dBm
95
TC = +25C
PRF = 0dBm
95
PLO = 0dBm P = -3dBm LO
2LO - 2RF RESPONSE (dBc)
TC = +85C 75
2LO - 2RF RESPONSE (dBc)
2LO - 2RF RESPONSE (dBc)
85
85
85
75
75
65 TC = -40C
TC = -25C
65
PLO = +3dBm
65
VCC = 5.25V
55
55
55
45 800 850 900 950 1000 RF FREQUENCY (MHz)
45 800 850 900 950 1000 RF FREQUENCY (MHz)
45 800 850 900 950 1000 RF FREQUENCY (MHz)
3LO - 3RF RESPONSE vs. RF FREQUENCY
MAX2031 toc13
3LO - 3RF RESPONSE vs. RF FREQUENCY
MAX2031 toc14
3LO - 3RF RESPONSE vs. RF FREQUENCY
PRF = 0dBm
MAX2031 toc15
100
PRF = 0dBm TC = +25C TC = +85C
100
PRF = 0dBm PLO = 0dBm
100
3LO - 3RF RESPONSE (dBc)
3LO - 3RF RESPONSE (dBc)
3LO - 3RF RESPONSE (dBc)
90
90
90
VCC = 5.25V
80
80
80 VCC = 5.0V 70 VCC = 4.75V
70 TC = -40C, -25C 60 800 850 900 950 1000 RF FREQUENCY (MHz)
70
PLO = -3dBm PLO = +3dBm
60 800 850 900 950 1000 RF FREQUENCY (MHz)
60 800 850 900 950 1000 RF FREQUENCY (MHz)
INPUT P1dB vs. RF FREQUENCY
MAX2031 toc16
INPUT P1dB vs. RF FREQUENCY
MAX2031 toc17
INPUT P1dB vs. RF FREQUENCY
MAX2031 toc18
32 TC = -40C 30 INPUT P1dB (dBm)
32
32 VCC = 5.25V 30 INPUT P1dB (dBm)
30 INPUT P1dB (dBm)
PLO = 0dBm, +3dBm
28 TC = -25C, +85C TC = +25C 26
28 PLO = -3dBm 26
28 VCC = 4.75V 26 VCC = 5.0V
24 800 850 900 950 1000 RF FREQUENCY (MHz)
24 800 850 900 950 1000 RF FREQUENCY (MHz)
24 800 850 900 950 1000 RF FREQUENCY (MHz)
6
_______________________________________________________________________________________
High-Linearity, 650MHz to 1000MHz Upconversion/ Downconversion Mixer with LO Buffer/Switch MAX2031
Typical Operating Characteristics (continued)
(Typical Application Circuit, optimized for the 800MHz/900MHz cellular band (see Table 1), C1 = 82pF, C5 = 2pF, L1 and C4 not used, VCC = 5.0V, PLO = 0dBm, PRF = 0dBm, fLO > fRF, fIF = 160MHz, TC = +25C, unless otherwise noted.)
Downconverter Curves
LO SWITCH ISOLATION vs. LO FREQUENCY
MAX2031 toc19
LO SWITCH ISOLATION vs. LO FREQUENCY
MAX2031 toc20
LO SWITCH ISOLATION vs. LO FREQUENCY
MAX2031 toc21
60
60
60
LO SWITCH ISOLATION (dB)
LO SWITCH ISOLATION (dB)
LO SWITCH ISOLATION (dB)
55
TC = -40C, -25C
55
55
50 TC = +85C 45 TC = +25C
50 PLO = -3dBm, 0dBm, +3dBm 45
50
45
VCC = 4.75V, 5.0V, 5.25V
40 850 950 1050 1150 1250 LO FREQUENCY (MHz)
40 850 950 1050 1150 1250 LO FREQUENCY (MHz)
40 850 950 1050 1150 1250 LO FREQUENCY (MHz)
LO LEAKAGE AT IF PORT vs. LO FREQUENCY
MAX2031 toc22
LO LEAKAGE AT IF PORT vs. LO FREQUENCY
MAX2031 toc23
LO LEAKAGE AT IF PORT vs. LO FREQUENCY
MAX2031 toc24
-20 TC = -40C, -25C -30 LO LEAKAGE (dBm)
-20
-20 VCC = 5.25V -30 LO LEAKAGE (dBm)
-30 LO LEAKAGE (dBm)
-40
TC = +25C TC = +85C
-40 PLO = -3dBm, 0dBm, +3dBm -50
-40 VCC = 4.75V VCC = 5.0V -50
-50
-60 960 1010 1060 1110 1160 LO FREQUENCY (MHz)
-60 960 1010 1060 1110 1160 LO FREQUENCY (MHz)
-60 960 1010 1060 1110 1160 LO FREQUENCY (MHz)
LO LEAKAGE AT RF PORT vs. LO FREQUENCY
MAX2031 toc25
LO LEAKAGE AT RF PORT vs. LO FREQUENCY
MAX2031 toc26
LO LEAKAGE AT RF PORT vs. LO FREQUENCY
MAX2031 toc27
-15 -20 -25 -30 TC = +85C -35 -40 -45 850 950 1050 1150 TC = +25C TC = -40C, -25C
-15 -20 -25 -30 -35 -40 -45
-15 -20 VCC = 5.25V -25 -30 -35 -40 -45 VCC = 4.75V VCC = 5.0V
LO LEAKAGE AT RF PORT (dBm)
LO LEAKAGE AT RF PORT (dBm)
PLO = -3dBm, 0dBm, +3dBm
LO LEAKAGE AT RF PORT (dBm)
1250
850
950
1050
1150
1250
850
950
1050
1150
1250
LO FREQUENCY (MHz)
LO FREQUENCY (MHz)
LO FREQUENCY (MHz)
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7
High-Linearity, 650MHz to 1000MHz Upconversion/ Downconversion Mixer with LO Buffer/Switch MAX2031
Typical Operating Characteristics (continued)
(Typical Application Circuit, optimized for the 800MHz/900MHz cellular band (see Table 1), C1 = 82pF, C5 = 2pF, L1 and C4 not used, VCC = 5.0V, PLO = 0dBm, PRF = 0dBm, fLO > fRF, fIF = 160MHz, TC = +25C, unless otherwise noted.)
Downconverter Curves
RF-TO-IF ISOLATION vs. RF FREQUENCY
MAX2031 toc28
RF-TO-IF ISOLATION vs. RF FREQUENCY
MAX2031 toc29
RF-TO-IF ISOLATION vs. RF FREQUENCY
MAX2031 toc30
60 55 RF-TO-IF ISOLATION (dB) 50 45 40 35 30 800 850 900 950 TC = +85C TC = +25C
60 55 RF-TO-IF ISOLATION (dB) PLO = +3dBm 50 45 40 35 30 PLO = -3dBm PLO = 0dBm
60 55 RF-TO-IF ISOLATION (dB) 50 45 40 35 30 VCC = 4.75V, 5.0V, 5.25V
TC = -40C, -25C
1000
800
850
900
950
1000
800
850
900
950
1000
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
RF PORT RETURN LOSS vs. RF FREQUENCY
MAX2031 toc31
IF PORT RETURN LOSS vs. IF FREQUENCY
5 10 IF PORT RETURN LOSS (dB) 15 20 25 30 35 40 45 VCC = 4.75V, 5.0V, 5.25V INCLUDES IF TRANSFORMER
MAX2031 toc32
IF PORT RETURN LOSS vs. IF FREQUENCY
5 10 IF PORT RETURN LOSS (dB) 15 20 25 30 35 40 45 50 PLO = -3dBm, 0dBm, +3dBm INCLUDES IF TRANSFORMER
MAX2031 toc33
0 5 RF PORT RETURN LOSS (dB) 10 15 20 PLO = -3dBm, 0dBm, +3dBm 25 30 750 800 850 900 950 1000
0
0
50 1050 0 100 200 300 400 500 RF FREQUENCY (MHz) IF FREQUENCY (MHz)
0
100
200
300
400
500
IF FREQUENCY (MHz)
LO SELECTED RETURN LOSS vs. LO FREQUENCY
MAX2031 toc34
LO UNSELECTED RETURN LOSS vs. LO FREQUENCY
MAX2031 toc35
SUPPLY CURRENT vs.TEMPERATURE (TC)
VCC = 5.25V SUPPLY CURRENT (mA) 90
MAX2031 toc36
0 5 LO SELECTED RETURN LOSS (dB) 10 15 20 25 30 35 40 800 900 1000 1100 1200 PLO = -3dBm PLO = +3dBm PLO = 0dBm
0 LO UNSELECTED RETURN LOSS (dB) 10 PLO = -3dBm, 0dBm, +3dBm 20 30 40 50 60
100
80 VCC = 5.0V 70 VCC = 4.75V
60 800 900 1000 1100 1200 1300 -40 -15 10 35 60 85 LO FREQUENCY (MHz) TEMPERATURE (C)
1300
LO FREQUENCY (MHz)
8
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High-Linearity, 650MHz to 1000MHz Upconversion/ Downconversion Mixer with LO Buffer/Switch
Typical Operating Characteristics (continued)
(Typical Application Circuit, optimized for the 700MHz band (see Table 1), C1 = 7pF, C5 = 3.3pF, L1 and C4 are not used, VCC = 5V, PLO = 0dBm, PRF = 0dBm, fLO > fRF, fIF = 140MHz, TC = +25C, unless otherwise noted.)
MAX2031
Downconverter Curves
CONVERSION LOSS vs. RF FREQUENCY
MAX2031 toc37
CONVERSION LOSS vs. RF FREQUENCY
MAX2031 toc38
CONVERSION LOSS vs. RF FREQUENCY
MAX2031 toc39
9
9
9
CONVERSION LOSS (dB)
7
CONVERSION LOSS (dB)
CONVERSION LOSS (dB)
8
TC = +85C
8
8
7 PLO = -3dBm, 0dBm, +3dBm
7 VCC = 4.75V, 5.0V, 5.25V
6
TC = -40C
TC = +25C
6
6
5
650
700
750
800
850
5
650
700
750
800
850
5
650
700
750
800
850
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
INPUT IP3 vs. RF FREQUENCY
MAX2031 toc40
INPUT IP3 vs. RF FREQUENCY
MAX2031 toc41
INPUT IP3 vs. RF FREQUENCY
PRF = 0dBm/TONE
38 INPUT IP3 (dBm) 36 VCC = 5.25V
MAX2031 toc42
40 PRF = 0dBm/TONE 38 INPUT IP3 (dBm) 36 34 32 30 TC = -40C TC = +25C TC = +25C TC = +85C
40 PRF = 0dBm/TONE 38 INPUT IP3 (dBm) 36 34 32 30
40
VCC = 5.0V
34
PLO = -3dBm, 0dBm, +3dBm
VCC = 4.75V
32 30
650
700
750
800
850
650
700
750
800
850
650
700
750
800
850
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
2LO-2RF RESPONSE vs. RF FREQUENCY
MAX2031 toc43
2LO-2RF RESPONSE vs. RF FREQUENCY
MAX2031 toc44
2LO-2RF RESPONSE vs. RF FREQUENCY
PRF = 0dBm
MAX2031 toc45
85
PRF = 0dBm
85
PRF = 0dBm
85
2LO-2RF RESPONSE (dBc)
2LO-2RF RESPONSE (dBc)
2LO-2RF RESPONSE (dBc)
75
75
75
TC = +85C
65
PLO = +3dBm
65
65
55
TC = +25C TC = -40C
PLO = 0dBm
55
PLO = -3dBm
55
VCC = 4.75V, 5.0V, 5.25V
45
650
700
750
800
850
45
650
700
750
800
850
45
650
700
750
800
850
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
_______________________________________________________________________________________
9
High-Linearity, 650MHz to 1000MHz Upconversion/ Downconversion Mixer with LO Buffer/Switch MAX2031
Typical Operating Characteristics (continued)
(Typical Application Circuit, optimized for the 700MHz band (see Table 1), C1 = 7pF, C5 = 3.3pF, L1 and C4 are not used, VCC = 5V, PLO = 0dBm, PRF = 0dBm, fLO > fRF, fIF = 140MHz, TC = +25C, unless otherwise noted.)
Downconverter Curves
3LO-3RF RESPONSE vs. RF FREQUENCY
MAX2031 toc46
3LO-3RF RESPONSE vs. RF FREQUENCY
PRF = 0dBm 3LO-3RF RESPONSE (dBc)
MAX2031 toc47
3LO-3RF RESPONSE vs. RF FREQUENCY
VCC = 5.25V
3LO-3RF RESPONSE (dBc)
TC = +25C
3LO-3RF RESPONSE (dBc)
PRF = 0dBm
PRF = 0dBm
80
80
80
TC = +85C
70
TC = -40C
70
PLO = -3dBm, 0dBm, +3dBm
70
VCC = 5.0V
VCC = 4.75V
60 60 60
650
700
750
800
850
650
700
750
800
850
650
700
750
800
850
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
INPUT P1dB vs. RF FREQUENCY
MAX2031 toc49
INPUT P1dB vs. RF FREQUENCY
MAX2031 toc50
INPUT P1dB vs. RF FREQUENCY
VCC = 5.25V VCC = 5.0V
MAX2031 toc51
30 29 INPUT P1dB (dBm)
30
30 29 INPUT P1dB (dBm) 28 27 VCC = 4.75V 26
PLO = +3dBm
29 INPUT P1dB (dBm) 28 27 26 PLO = 0dBm
TC = +25C
28 27 26 TC = -40C 25 650 700 750 800 850
TC = +85C
PLO = -3dBm
25 650 700 750 800 850 25 650 700 750 800 850
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
LO LEAKAGE AT IF PORT vs. LO FREQUENCY
MAX2031 toc52
LO LEAKAGE AT IF PORT vs. LO FREQUENCY
MAX2031 toc53
LO LEAKAGE AT IF PORT vs. LO FREQUENCY
MAX2031 toc54
-15 LO LEAKAGE AT IF PORT (dBm)
-15 LO LEAKAGE AT IF PORT (dBm)
-15 LO LEAKAGE AT IF PORT (dBm)
TC = -40C -25
-25
PLO = +3dBm
-25
VCC = 5.25V
-35
TC = +25C TC = +85C
-35
-35
PLO = 0dBm
-45
PLO = -3dBm
VCC = 5.0V VCC = 4.75V
-45
-45
790
840
890
940
990
790
840
890
940
990
790
840
890
940
990
LO FREQUENCY (MHz)
LO FREQUENCY (MHz)
LO FREQUENCY (MHz)
10
______________________________________________________________________________________
MAX2031 toc48
90
90
90
High-Linearity, 650MHz to 1000MHz Upconversion/ Downconversion Mixer with LO Buffer/Switch
Typical Operating Characteristics (continued)
(Typical Application Circuit, optimized for the 700MHz band (see Table 1), C1 = 7pF, C5 = 3.3pF, L1 and C4 are not used, VCC = 5V, PLO = 0dBm, PRF = 0dBm, fLO > fRF, fIF = 140MHz, TC = +25C, unless otherwise noted.)
LO LEAKAGE AT RF PORT vs. LO FREQUENCY
MAX2031 toc55
MAX2031
Downconverter Curves
LO LEAKAGE AT RF PORT vs. LO FREQUENCY LO LEAKAGE AT RF PORT vs. LO FREQUENCY
MAX2031 toc56 MAX2031 toc57
-10 LO LEAKAGE AT RF PORT (dBm) TC = -40C
-10 LO LEAKAGE AT RF PORT (dBm)
-10 LO LEAKAGE AT RF PORT (dBm) VCC = 5.25V
-15
-15
PLO = +3dBm
-15
-20
-20
-20
-25
TC = +85C TC = +25C
PLO = -3dBm
-25
VCC = 5.0V
-25
VCC = 4.75V
PLO = 0dBm
-30
790
840
890
940
990
-30
790
840
890
940
990
-30
790
840
890
940
990
LO FREQUENCY (MHz)
LO FREQUENCY (MHz)
LO FREQUENCY (MHz)
2LO LEAKAGE AT RF PORT vs. LO FREQUENCY
MAX2031 toc58
2LO LEAKAGE AT RF PORT vs. LO FREQUENCY
MAX2031 toc59
2LO LEAKAGE AT RF PORT vs. LO FREQUENCY
VCC = 5.25V
-25 VCC = 5.0V
MAX2031 toc60
-20 2LO LEAKAGE AT RF PORT (dBm) TC = -40C -25
-20 PLO = +3dBm 2LO LEAKAGE AT RF PORT (dBm) -25
-20 2LO LEAKAGE AT RF PORT (dBm)
-30 TC = +25C -35 TC = +85C
-30
PLO = 0dBm
-30
VCC = 4.75V
-35
PLO = -3dBm
-35
-40
-40 790 840 890 940 990 LO FREQENCY (MHz)
790
840
890
940
990
-40
790
840
890
940
990
LO FREQUENCY (MHz)
LO FREQUENCY (MHz)
RF-TO-IF ISOLATION vs. RF FREQUENCY
MAX2031 toc61
RF-TO-IF ISOLATION vs. RF FREQUENCY
MAX2031 toc62
RF-TO-IF ISOLATION vs. RF FREQUENCY
MAX2031 toc63
60
60
60
TC = +85C
RF-TO-IF ISOLATION (dB) 50
RF-TO-IF ISOLATION (dB)
RF-TO-IF ISOLATION (dB)
50
50
40
TC = -40C
TC = +25C
40
PLO = -3dBm, 0dBm, +3dBm
VCC = 4.75V, 5.0V, 5.25V 40
30
650
700
750
800
850
30
650
700
750
800
850
30
650
700
750
800
850
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
______________________________________________________________________________________
11
High-Linearity, 650MHz to 1000MHz Upconversion/ Downconversion Mixer with LO Buffer/Switch MAX2031
Typical Operating Characteristics (continued)
(Typical Application Circuit, optimized for the 700MHz band (see Table 1), C1 = 7pF, C5 = 3.3pF, L1 and C4 are not used, VCC = 5V, PLO = 0dBm, PRF = 0dBm, fLO > fRF, fIF = 140MHz, TC = +25C, unless otherwise noted.)
Downconverter Curves
RF PORT RETURN LOSS vs. RF FREQUENCY
MAX2031 toc64
IF PORT RETURN LOSS vs. IF FREQUENCY
fLO = 890MHz IF PORT RETURN LOSS (dB) 5 10 15 VCC = 4.75V, 5.0V, 5.25V 20 25
MAX2031 toc65
LO SELECTED RETURN LOSS vs. LO FREQUENCY
MAX2031 toc66
0 5 10 15 20 25
0
0 LO SELECTED RETURN LOSS (dB)
RF PORT RETURN LOSS (dB)
10
PLO = 0dBm PLO = +3dBm
20
30 PLO = -3dBm 40
PLO = -3dBm, 0dBm, +3dBm
500
600
700
800
900
1000
50
100
150
200
250
300
350
600
750
900
1050
1200
RF FREQUENCY (MHz)
IF FREQUENCY (MHz)
LO FREQUENCY (MHz)
LO UNSELECTED RETURN LOSS vs. LO FREQUENCY
MAX2031 toc67
SUPPLY CURRENT vs. TEMPERATURE (TC)
VCC = 5.25V SUPPLY CURRENT (mA)
90
MAX2031 toc68
0 LO UNSELECTED RETURN LOSS (dB)
100
10
20
PLO = -3dBm, 0dBm, +3dBm
80
VCC = 5.0V
30
70
VCC = 4.75V
40
600
750
900
1050
1200
60
-40
-15
10
35
60
85
LO FREQENCY (MHz)
TEMPERATURE (NC)
12
______________________________________________________________________________________
High-Linearity, 650MHz to 1000MHz Upconversion/ Downconversion Mixer with LO Buffer/Switch MAX2031
Typical Operating Characteristics (continued)
(Typical Application Circuit, L1 = 4.7nH, C4 = 6pF, C5 not used, VCC = 5.0V, PLO = 0dBm, PIF = 0dBm, fRF = fLO + fIF, fIF = 160MHz, TC = +25C, unless otherwise noted.)
Upconverter Curves
CONVERSION LOSS vs. RF FREQUENCY (L-C BPF TUNED FOR 810MHz RF FREQUENCY)
TC = +25C 8 CONVERSION LOSS (dB) TC = +85C
MAX2031 toc69
CONVERSION LOSS vs. RF FREQUENCY (L-C BPF TUNED FOR 810MHz RF FREQUENCY)
MAX2031 toc70
CONVERSION LOSS vs. RF FREQUENCY (L-C BPF TUNED FOR 810MHz RF FREQUENCY)
MAX2031 toc71
9
9 8 CONVERSION LOSS (dB) 7 6 5 4 3 PLO = -3dBm, 0dBm, +3dBm
9 8 CONVERSION LOSS (dB) 7 6 5 4 3 VCC = 4.75V, 5.0V, 5.25V
7 TC = -25C TC = -40C 5
6
4 750 800 850 900 950 1000 1050 RF FREQUENCY (MHz)
750
800
850
900
950
1000
1050
750
800
850
900
950
1000
1050
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
INPUT IP3 vs. RF FREQUENCY (L-C BPF TUNED FOR 810MHz RF FREQUENCY)
MAX2031 toc72
INPUT IP3 vs. RF FREQUENCY (L-C BPF TUNED FOR 810MHz RF FREQUENCY)
MAX2031 toc73
INPUT IP3 vs. RF FREQUENCY (L-C BPF TUNED FOR 810MHz RF FREQUENCY)
PIF = 0dBm/TONE VCC = 5.25V
MAX2031 toc74
39 37 35 INPUT IP3 (dBm) 33
PIF = 0dBm/TONE
TC = -25C
39 37 35 INPUT IP3 (dBm)
TC = -40C
PIF = 0dBm/TONE
39 37 35 INPUT IP3 (dBm)
TC = +85C 31 29 27 25 750 800 850 900
33 31 29 27 25
PLO = -3dBm, 0dBm, +3dBm
33 VCC = 4.75V 31 29 27 25 VCC = 5.0V
TC = +25C
950
1000
1050
750
800
850
900
950
1000
1050
750
800
850
900
950
1000
1050
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
RF FREQUENCY (MHz)
LO + 2IF REJECTION vs. LO FREQUENCY (L-C BPF TUNED FOR 810MHz RF FREQUENCY)
MAX2031 toc75
LO + 2IF REJECTION vs. LO FREQUENCY (L-C BPF TUNED FOR 810MHz RF FREQUENCY)
PIF = 0dBm
MAX2031 toc76
LO + 2IF REJECTION vs. LO FREQUENCY (L-C BPF TUNED FOR 810MHz RF FREQUENCY)
PIF = 0dBm VCC = 5.25V VCC = 5.0V
MAX2031 toc77
80 75 LO + 2IF REJECTION (dBc) 70 65 60 55 50
PIF = 0dBm
80 75 LO + 2IF REJECTION (dBc) 70 65 60 55 50
80 75 LO + 2IF REJECTION (dBc) 70 65 60 55 50
TC = -40C, -25C
TC = +25C
PLO = +3dBm
TC = +85C
PLO = -3dBm PLO = 0dBm
VCC = 4.75V
910
960
1010
1060
1110
1160
1210
910
960
1010
1060
1110
1160
1210
910
960
1010
1060
1110
1160
1210
LO FREQUENCY (MHz)
LO FREQUENCY (MHz)
LO FREQUENCY (MHz)
______________________________________________________________________________________
13
High-Linearity, 650MHz to 1000MHz Upconversion/ Downconversion Mixer with LO Buffer/Switch MAX2031
Typical Operating Characteristics (continued)
(Typical Application Circuit, L1 = 4.7nH, C4 = 6pF, C5 not used, VCC = 5.0V, PLO = 0dBm, PIF = 0dBm, fRF = fLO + fIF, fIF = 160MHz, TC = +25C, unless otherwise noted.)
Upconverter Curves
LO - 2IF REJECTION vs. LO FREQUENCY (L-C BPF TUNED FOR 810MHz RF FREQUENCY)
MAX2031 toc78
LO - 2IF REJECTION vs. LO FREQUENCY (L-C BPF TUNED FOR 810MHz RF FREQUENCY)
MAX2031 toc79
LO - 2IF REJECTION vs. LO FREQUENCY (L-C BPF TUNED FOR 810MHz RF FREQUENCY)
PIF = 0dBm VCC = 5.25V
MAX2031 toc80
80 75 LO - 2IF REJECTION (dBc) 70 65
PIF = 0dBm
80 75 LO - 2IF REJECTION (dBc) 70 65 60
TC = -40C, -25C
PIF = 0dBm
80 75 LO - 2IF REJECTION (dBc) 70 65 60
TC = +85C
PLO = +3dBm
VCC = 5.0V
TC = +25C 60 55 50 910 960 1010 1060 1110 1160 1210 LO FREQUENCY (MHz)
PLO = -3dBm 55 50 910 960 1010
PLO = 0dBm
VCC = 4.75V 55 50
1060
1110
1160
1210
910
960
1010
1060
1110
1160
1210
LO FREQUENCY (MHz)
LO FREQUENCY (MHz)
LO + 3IF REJECTION vs. LO FREQUENCY (L-C BPF TUNED FOR 810MHz RF FREQUENCY)
MAX2031 toc81
LO + 3IF REJECTION vs. LO FREQUENCY (L-C BPF TUNED FOR 810MHz RF FREQUENCY)
PIF = 0dBm
MAX2031 toc82
LO + 3IF REJECTION vs. LO FREQUENCY (L-C BPF TUNED FOR 810MHz RF FREQUENCY)
PIF = 0dBm VCC = 5.25V
MAX2031 toc83
90
PIF = 0dBm
90
90
LO + 3IF REJECTION (dBc)
LO + 3IF REJECTION (dBc)
TC = -40C, -25C, +25C, +85C 70
PLO = -3dBm, 0dBm, +3dBm 70
LO + 3IF REJECTION (dBc)
80
80
80 VCC = 4.75V, 5.0V 70
60
60
60
50 910 960 1010 1060 1110 1160 1210 LO FREQUENCY (MHz)
50 910 960 1010 1060 1110 1160 1210 LO FREQUENCY (MHz)
50 910 960 1010 1060 1110 1160 1210 LO FREQUENCY (MHz)
LO - 3IF REJECTION vs. LO FREQUENCY (L-C BPF TUNED FOR 810MHz RF FREQUENCY)
MAX2031 toc84
LO - 3IF REJECTION vs. LO FREQUENCY (L-C BPF TUNED FOR 810MHz RF FREQUENCY)
MAX2031 toc85
LO - 3IF REJECTION vs. LO FREQUENCY (L-C BPF TUNED FOR 810MHz RF FREQUENCY)
PIF = 0dBm VCC = 5.25V LO - 3IF REJECTION (dBc) 80 VCC = 4.75V 70 VCC = 5.0V 60
MAX2031 toc86
90
PIF = 0dBm
TC = -40C, -25C, +25C
90
PIF = 0dBm
90
LO - 3IF REJECTION (dBc)
LO - 3IF REJECTION (dBc)
80 TC = +85C 70
80 PLO = -3dBm, 0dBm, +3dBm 70
60
60
50 910 960 1010 1060 1110 1160 1210 LO FREQUENCY (MHz)
50 910 960 1010 1060 1110 1160 1210 LO FREQUENCY (MHz)
50 910 960 1010 1060 1110 1160 1210 LO FREQUENCY (MHz)
14
______________________________________________________________________________________
High-Linearity, 650MHz to 1000MHz Upconversion/ Downconversion Mixer with LO Buffer/Switch MAX2031
Typical Operating Characteristics (continued)
(Typical Application Circuit, L1 = 4.7nH, C4 = 6pF, C5 not used, VCC = 5.0V, PLO = 0dBm, PIF = 0dBm, fRF = fLO + fIF, fIF = 160MHz, TC = +25C, unless otherwise noted.)
Upconverter Curves
LO LEAKAGE AT RF PORT vs. LO FREQUENCY (L-C BPF TUNED FOR 810MHz RF FREQUENCY)
MAX2031 toc87
LO LEAKAGE AT RF PORT vs. LO FREQUENCY (L-C BPF TUNED FOR 810MHz RF FREQUENCY)
MAX2031 toc88
LO LEAKAGE AT RF PORT vs. LO FREQUENCY (L-C BPF TUNED FOR 810MHz RF FREQUENCY)
MAX2031 toc89
-15
-15
-15
LO LEAKAGE AT RF PORT (dBm)
LO LEAKAGE AT RF PORT (dBm)
LO LEAKAGE AT RF PORT (dBm)
-20
TC = -40C, -25C
-20
-20
VCC = 5.25V
-25
-25
-25
-30
TC = +85C
TC = +25C
-30
PLO = -3dBm, 0dBm, +3dBm
-30
VCC = 4.75V
VCC = 5.0V
-35 910 960 1010 1060 1110 1160 1210 LO FREQUENCY (MHz)
-35 910 960 1010 1060 1110 1160 1210 LO FREQUENCY (MHz)
-35 910 960 1010 1060 1110 1160 1210 LO FREQUENCY (MHz)
IF LEAKAGE AT RF vs. LO FREQUENCY (L-C BPF TUNED FOR 810MHz RF FREQUENCY)
MAX2031 toc90
IF LEAKAGE AT RF vs. LO FREQUENCY (L-C BPF TUNED FOR 810MHz RF FREQUENCY)
MAX2031 toc91
IF LEAKAGE AT RF vs. LO FREQUENCY (L-C BPF TUNED FOR 810MHz RF FREQUENCY)
MAX2031 toc92
-50 TC = +25C TC = -40C, -25C IF LEAKAGE (dBm)
-50 PLO = -3dBm -60 IF LEAKAGE (dBm) PLO = 0dBm -70 PLO = +3dBm -80
-50 VCC = 5.0V VCC = 5.25V
-60
-60 IF LEAKAGE (dBm)
-70 TC = +85C
-70 VCC = 4.75V -80
-80
-90
-90
-90
-100 910 960 1010 1060 1110 1160 1210 LO FREQUENCY (MHz)
-100 910 960 1010 1060 1110 1160 1210 LO FREQUENCY (MHz)
-100 910 960 1010 1060 1110 1160 1210 LO FREQUENCY (MHz)
RF PORT RETURN LOSS vs. RF FREQUENCY (L-C BPF TUNED FOR 810MHz RF FREQUENCY)
L1 AND C4 BPF REMOVED L1 AND C4 BPF INSTALLED
MAX2031 toc93
0 5 RF PORT RETURN LOSS (dB) 10 15 20 25 30 35 750 800 850 THE OPTIONAL L-C BPF ENHANCES PERFORMANCE IN THE UPCONVERTER MODE BUT LIMITS RF BANDWIDTH 900 950 1000
1050
RF FREQUENCY (MHz)
______________________________________________________________________________________
15
High-Linearity, 650MHz to 1000MHz Upconversion/ Downconversion Mixer with LO Buffer/Switch MAX2031
Pin Description
PIN 1, 6, 8, 14 2 3 4, 5, 10, 12, 13, 16, 17, 20 7 9 11 15 18, 19 -- NAME VCC RF TAP GND FUNCTION Power-Supply Connection. Bypass each VCC pin to GND with capacitors as shown in the Typical Application Circuit. Single-Ended 50 RF Input/Output. This port is internally matched and DC shorted to GND through a balun. Center Tap of the Internal RF Balun. Connect to ground. Ground
LOBIAS Bias Resistor for Internal LO Buffer. Connect a 523 1% resistor from LOBIAS to the power supply. LOSEL LO1 LO2 IF-, IF+ EP Local Oscillator Select. Logic-control input for selecting LO1 or LO2. Local Oscillator Input 1. Drive LOSEL low to select LO1. Local Oscillator Input 2. Drive LOSEL high to select LO2. Differential IF Input/Outputs Exposed Pad. Internally connected to GND. Solder this exposed pad to a PCB pad that uses multiple ground vias to provide heat transfer out of the device into the PCB ground planes. These multiple ground vias are also required to achieve the noted RF performance.
Detailed Description
The MAX2031 can operate either as a downconverter or an upconverter mixer that provides approximately 7dB of conversion loss with a typical 7dB noise figure. IIP3 is +36dBm for both upconversion and downconversion modes. The integrated baluns and matching circuitry allow for 50 single-ended interfaces to the RF port and the two LO ports. The RF port can be used as an input for downconversion or an output for upconversion. A single-pole, double-throw (SPDT) switch provides 50ns switching time between the two LO inputs with 49dB of LO-to-LO isolation. Furthermore, the integrated LO buffer provides a high drive level to the mixer core, reducing the LO drive required at the MAX2031's inputs to a -3dBm to +3dBm range. The IF port incorporates a differential output for downconversion, which is ideal for providing enhanced IIP2 performance. For upconversion, the IF port is a differential input. Specifications are guaranteed over broad frequency ranges to allow for use in cellular band WCDMA, cdmaOneTM, cdma2000, and GSM 850/GSM 900 2.5G EDGE base stations. The MAX2031 is specified to operate over a 650MHz to 1000MHz RF frequency range, a 650MHz to 1250MHz LO frequency range, and a DC to 250MHz IF frequency range. Operation beyond these ranges is possible; see the Typical Operating Characteristics for additional details. The MAX2031 is optimized for high-side LO injection architectures. However, the device can operate in lowcdmaOne is a trademark of CDMA Development Group.
16
side LO injection applications with an extended LO range, but performance degrades as fLO decreases. See the Typical Operating Characteristics for measurements taken with fLO below 960MHz. For a pin-compatible device that has been optimized for LO frequencies below 960MHz, refer to the MAX2029.
RF Port and Balun
For using the MAX2031 as a downconverter, the RF input is internally matched to 50, requiring no external matching components. A DC-blocking capacitor is required because the input is internally DC shorted to ground through the on-chip balun. For upconverter operation, the RF port is a single-ended output similarly matched to 50.
LO Inputs, Buffer, and Balun
The MAX2031 is optimized for high-side LO injection architectures with a 650MHz to 1250MHz LO frequency range. For a device with a 570MHz to 900MHz LO frequency range, refer to the MAX2029. As an added feature, the MAX2031 includes an internal LO SPDT switch that can be used for frequency-hopping applications. The switch selects one of the two single-ended LO ports, allowing the external oscillator to settle on a particular frequency before it is switched in. LO switching time is typically less than 50ns, which is more than adequate for nearly all GSM applications. If frequency hopping is not employed, set the switch to either of the LO inputs. The switch is controlled by a digital input (LOSEL): logic-high selects LO2, logic-low selects LO1.
______________________________________________________________________________________
High-Linearity, 650MHz to 1000MHz Upconversion/ Downconversion Mixer with LO Buffer/Switch
To avoid damage to the part, voltage MUST be applied to VCC before digital logic is applied to LOSEL (see the Absolute Maximum Ratings). LO1 and LO2 inputs are internally matched to 50, requiring an 82pF DC-blocking capacitor at each input. A two-stage internal LO buffer allows a wide inputpower range for the LO drive. All guaranteed specifications are for a -3dBm to +3dBm LO signal power. The on-chip low-loss balun, along with an LO buffer, drives the double-balanced mixer. All interfacing and matching components from the LO inputs to the IF outputs are integrated on-chip.
Applications Information
Input and Output Matching
The RF and LO inputs are internally matched to 50. No matching components are required. As a downconverter, the return loss at the RF port is typically better than 15dB over the entire input range (650MHz to 1000MHz), and return loss at the LO ports are typically 15dB (960MHz to 1180MHz). RF and LO inputs require only DC-blocking capacitors for interfacing (see Table 1). An optional L-C bandpass filter (BPF) can be installed at the RF port to improve upconverter performance. See the Typical Application Circuit and Typical Operating Characteristics for upconverter operation with an L-C BPF tuned for 810MHz RF frequency. Performance can be optimized at other frequencies by choosing different values for L1 and C4. Removing L1 and C4 altogether results in a broader match, but performance degrades. Contact factory for details. The IF output impedance is 50 (differential). For evaluation, an external low-loss 1:1 (impedance ratio) balun transforms this impedance to a 50 single-ended output (see the Typical Application Circuit).
MAX2031
High-Linearity Mixer
The core of the MAX2031 is a double-balanced, highperformance passive mixer. Exceptional linearity is provided by the large LO swing from the on-chip LO buffer.
Differential IF
The MAX2031 mixer has a DC to 250MHz IF frequency range. Note that these differential ports are ideal for providing enhanced IIP2 performance. Single-ended IF applications require a 1:1 balun to transform the 50 differential IF impedance to 50 single-ended. Including the balun, the IF return loss is better than 15dB. The differential IF is used as an input port for upconverter operation. The user can use a differential IF amplifier following the mixer, but a DC block is required on both IF pins.
Bias Resistor
Bias current for the LO buffer is optimized by fine tuning resistor R1. If reduced current is required at the
Table 1. Typical Application Circuit Component List
DESIGNATION QTY DESCRIPTION 82pF microwave capacitor (0603). Use for 800MHz/900MHz cellular band applications. C1 1 7pF microwave capacitor (0603). Use for 700MHz band applications C2, C7, C8, C10, C11, C12 C3, C6, C9 C4* 6 3 1 82pF microwave capacitors (0603) 0.01F microwave capacitors (0603) 6pF microwave capacitor (0603) 2pF microwave capacitor (0603). Use for 800MHz/900MHz cellular band applications. C5** 1 3.3pF microwave capacitor (0603). Use for 700MHz band applications L1* R1 T1 U1 1 1 1 1 4.7nH inductor (0603) 523 1% resistor (0603) MABAES0029 1:1 transformer (50:50) MAX2031 IC (20 TQFN) Digi-Key Corp. M/A-Com, Inc. Maxim Integrated Products, Inc. -- Murata Electronics North America, Inc. Murata Electronics North America, Inc. Murata Electronics North America, Inc. -- Murata Electronics North America, Inc. SUPPLIER
*C4 and L1 installed only when mixer is used as an upconverter. **C5 installed only when mixer is used as a downconverter. ______________________________________________________________________________________ 17
High-Linearity, 650MHz to 1000MHz Upconversion/ Downconversion Mixer with LO Buffer/Switch MAX2031
expense of performance, contact the factory for details. If the 1% bias resistor values are not readily available, substitute standard 5% values.
Power-Supply Bypassing
Proper voltage-supply bypassing is essential for highfrequency circuit stability. Bypass each VCC pin with the capacitors shown in the Typical Application Circuit. See Table 1.
Layout Considerations
A properly designed PC board is an essential part of any RF/microwave circuit. Keep RF signal lines as short as possible to reduce losses, radiation, and inductance. For the best performance, route the ground-pin traces directly to the exposed pad under the package. The PC board exposed pad MUST be connected to the ground plane of the PC board. It is suggested that multiple vias be used to connect this pad to the lower-level ground planes. This method provides a good RF/thermal conduction path for the device. Solder the exposed pad on the bottom of the device package to the PC board. The MAX2031 evaluation kit can be used as a reference for board layout. Gerber files are available upon request at www.maxim-ic.com.
Exposed Pad RF/Thermal Considerations
The exposed pad (EP) of the MAX2031's 20-pin thin QFN-EP package provides a low-thermal-resistance path to the die. It is important that the PC board on which the MAX2031 is mounted be designed to conduct heat from the EP. In addition, provide the EP with a low-inductance path to electrical ground. The EP MUST be soldered to a ground plane on the PC board, either directly or through an array of plated via holes.
18
______________________________________________________________________________________
High-Linearity, 650MHz to 1000MHz Upconversion/ Downconversion Mixer with LO Buffer/Switch
Typical Application Circuit
T1 1 3 4 5
MAX2031
IF
C5 GND GND 17 GND 16 C12 VCC C4 L1 RF TAP GND GND 1 2 3 4 E.P. 5 11 15 LO2 VCC GND GND LO1 C10 6 VCC 7 LOBIAS 8 VCC 9 LOSEL 10 GND LO1 C11 LO2 VCC 14 13 12 LOSEL C6 C7 VCC 20
IF+ 19 C8
C3 C1 RF
C2
+
18
R1 VCC
IF-
MAX2031
VCC NOTE: L1 AND C4 USED ONLY FOR UPCONVERTER OPERATION. C5 USED ONLY FOR DOWNCONVERTER OPERATION.
C9
Chip Information
PROCESS: SiGe BiCMOS
PACKAGE TYPE 20 Thin QFN-EP
Package Information
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. PACKAGE CODE T2055+3 DOCUMENT NO. 21-0140
______________________________________________________________________________________
19
High-Linearity, 650MHz to 1000MHz Upconversion/ Downconversion Mixer with LO Buffer/Switch MAX2031
Revision History
REVISION NUMBER 0 1 REVISION DATE 7/05 6/09 Initial release Added new Electrical Characteristics tables and Typical Operating Characteristics DESCRIPTION PAGES CHANGED -- 1-16
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
20 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 2009 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.

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