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HMC307QS16G / 307QS16GE
v07.0505
1dB LSB GaAs MMIC 5-BIT DIGITAL ATTENUATOR, DC - 4 GHz
Typical Applications
Features
1 dB LSB Steps to 31 dB Single Control Line Per Bit +/- 0.5 dB Typical Bit Error Miniature QSOP-16 Package: 29.4 mm2
6
ATTENUATORS - SMT
The HMC307QS16G / HMC307QS16GE is ideal for: * Cellular * PCS, ISM, MMDS * Wireless Local Loop
Functional Diagram
General Description
The HMC307QS16G & HMC307QS16GE are broadband 5-bit GaAs IC digital attenuators in 16 lead QSOP grounded base surface mount plastic packages. Covering DC to 4 GHz, the insertion loss is less then 2 dB typical. The attenuator bit values are 1 (LSB), 2, 4, 8, and 16 dB for a total attenuation of 31 dB. Attenuation accuracy is excellent at 0.5 dB typical with an IIP3 of up to +44 dBm. Five bit control voltage inputs, toggled between 0 and -5V, are used to select each attenuation state at less than 50 uA each. A single Vee bias of -5V allows operation down to DC. This product is an excellent alternative to the HMC235QS16G.
Electrical Specifications, TA = +25 C, Vee = -5V & VCTL= 0/Vee
Parameter Frequency DC - 1.4 GHz 1.4 - 2.3 GHz 2.3 - 2.7 GHz 2.7 - 4.0 GHz DC - 4.0 GHz DC - 1.4 GHz 1.4 - 2.3 GHz 2.3 - 2.7 GHz 2.7 - 4.0 GHz DC - 2.7 GHz DC - 2.7 GHz 2.7 - 4.0 GHz 2.7 - 4.0 GHz 0.5 - 4.0 GHz 0.5 - 4.0 GHz 11 11 10 8 Min. Typical 1.8 1.9 2.0 2.1 31 15 17 18 15 Max. 2.2 2.4 2.5 2.7 Units dB dB dB dB dB dB dB dB dB dB dB dB dB dBm dBm
Insertion Loss
Attenuation Range
Return Loss (RF1 & RF2, All Atten. States)
Attenuation Accuracy: (Referenced to Insertion Loss) 1 - 20 dB States 21 - 31 dB States 1 - 15 dB States 16 - 31 dB States Input Power for 0.1 dB Compression Input Third Order Intercept Point (Two-tone Input Power = 0 dBm Each Tone) Switching Characteristics tRISE, tFALL (10/90% RF) tON, tOFF (50% CTL to 10/90% RF)
0.2 + 3% of Atten. Setting Max 0.3 + 5% of Atten. Setting Max 0.3 + 5% of Atten. Setting Max 0.6 + 10% of Atten. Setting Max
24 44
DC - 4.0 GHz
140 160
ns ns
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For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
HMC307QS16G / 307QS16GE
v07.0505
1dB LSB GaAs MMIC 5-BIT DIGITAL ATTENUATOR, DC - 4 GHz
Return Loss RF1, RF2
Insertion Loss
0 -0.5 INSERTION LOSS (dB)
(Only Major States are Shown)
0 -5
31 dB 8 dB 16 dB
6
ATTENUATORS - SMT
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-1.5 -2 -2.5 -3 -3.5 -4 0 0.5 1 1.5 2 2.5 3 3.5 4 FREQUENCY (GHz)
+25 -40 +85
RETURN LOSS (dB)
-1
-10 -15 -20 -25 -30
1 dB
-35
2, 4 dB
-40 0 0.5 1 1.5 2 2.5 3 3.5 4 FREQUENCY (GHz)
Normalized Attenuation
(Only Major States are Shown)
0 NORMALIZED ATTENUATION (dB) -5
Absolute Bit Error vs. Attenuation State
2
BIT ERROR (dB)
-10 -15 -20 -25 -30 -35 0 0.5 1 1.5 2 2.5 3 3.5 4 FREQUENCY (GHz)
1.5
3.5 GHz 2.4 GHz 0.1 GHz
1
1.9 GHz 0.9 GHz
1 dB 2 dB 4 dB
8 dB 16 dB 31 dB
0.5
0 1 4 7 10 13 16 19 22 25 28 31 ATTENUATION STATE (dB)
Absolute Bit Error vs. Frequency
(Only Major States are Shown)
2
Relative Phase vs. Frequency
(Only Major States are Shown)
100 80 60 40 20 0
1, 2 dB 31 dB
1.5 BIT ERROR (dB)
31 dB
1
RELATIVE PHASE (deg.)
16 dB
8 dB
4 dB
0.5
1, 2 & 4 dB
16 dB
8 dB
0 0 0.5 1 1.5 2 2.5 3 3.5 4 FREQUENCY (GHz)
-20 0 0.5 1 1.5 2 2.5 3 3.5 4 FREQUENCY (GHz)
For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
HMC307QS16G / 307QS16GE
v07.0505
1dB LSB GaAs MMIC 5-BIT DIGITAL ATTENUATOR, DC - 4 GHz
Control Voltage
Truth Table
Control Voltage Input V1 16 dB Low Low Low V2 8 dB Low Low Low Low High Low High V3 4 dB Low Low Low High Low Low High V4 2 dB Low Low High Low Low Low High V5 1 dB Low High Low Low Low Low High Attenuation State RF1 - RF2 Reference I.L. 1 dB 2 dB 4 dB 8 dB 16 dB 31 dB Max. Atten.
6
ATTENUATORS - SMT
State Low High
Bias Condition 0 to -3V @ 70 uA Typ. Vee + 0.8V @ 5 uA Typ.
Note: Vee = -5V 10%
Bias Voltage & Current
Vee Range = -5.0 Vdc 10% Vee (VDC) -5.0 lee (Typ.) (mA) 3 lee (Max.) (mA) 6
Low Low High High
Any combination of the above states will provide an attenuation approximately equal to the sum of the bits selected.
Application Circuit
DC Blocking Capacitors C1 & C2 are required on RF1 & RF2. Choose C1 = C2 = 100 pF ~ 0.1 uF to allow lowest customer specific frequency to pass with minimal loss. R1= 5K Ohm is required to supply voltage to the circuit through either Pin 11 or Pin 14.
Suggested Driver Circuit (One Circuit Required Per Bit Control Input)
Simple driver using inexpensive standard logic ICs provides fast switching using minimum DC current. * Recommended value to suppress unwanted RF signals at V1 - V5 control lines.
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For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
HMC307QS16G / 307QS16GE
v07.0505
1dB LSB GaAs MMIC 5-BIT DIGITAL ATTENUATOR, DC - 4 GHz
Absolute Maximum Ratings
Control Voltage (V1 - V5) Bias Voltage (Vee) Storage Temperature Operating Temperature RF Input Power (0.5 - 4 GHz) Vee - 0.5 Vdc -7.0 Vdc -65 to +150 C
6
ATTENUATORS - SMT
NOTES: 1. LEADFRAME MATERIAL: COPPER ALLOY 2. DIMENSIONS ARE IN INCHES [MILLIMETERS]. 3. DIMENSION DOES NOT INCLUDE MOLDFLASH OF 0.15mm PER SIDE. 4. DIMENSION DOES NOT INCLUDE MOLDFLASH OF 0.25mm PER SIDE. 5. ALL GROUND LEADS AND GROUND PADDLE MUST BE SOLDERED TO PCB RF GROUND.
-40 to +85 C +26 dBm
ELECTROSTATIC SENSITIVE DEVICE OBSERVE HANDLING PRECAUTIONS
Outline Drawing
Package Information
Part Number HMC307QS16G HMC307QS16GE Package Body Material Low Stress Injection Molded Plastic RoHS-compliant Low Stress Injection Molded Plastic Lead Finish Sn/Pb Solder 100% matte Sn MSL Rating MSL1 MSL1
[1]
Package Marking [3] HMC307 XXXX HMC307 XXXX
[2]
[1] Max peak reflow temperature of 235 C [2] Max peak reflow temperature of 260 C [3] 4-Digit lot number XXXX
For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
6 - 69
HMC307QS16G / 307QS16GE
v07.0505
1dB LSB GaAs MMIC 5-BIT DIGITAL ATTENUATOR, DC - 4 GHz
Evaluation Circuit Board
6
ATTENUATORS - SMT
* R2 - R6 = 100 Ohm. These resistors are optional and may be used to enhance decoupling of the RF path from the control inputs.
List of Materials for Evaluation PCB 103397 [1]
Item J1 - J2 J3 - J9 R1 R2 - R6 C1, C2 U1 PCB [2] Description PCB Mount SMA Connector DC Pin 5k Ohm Resistor, 0402 Pkg. 100 Ohm Resistor, 0402 Pkg. 0402 Chip Capacitor, Select Value for Lowest Frequency of Operation HMC307QS16G / HMC307QS16GE Digital Attenuator 103395 Evaluation PCB 1.5" x 1.5"
The circuit board used in the final application should use RF circuit design techniques. Signal lines should have 50 ohm impedance while the package ground leads and exposed paddle should be connected directly to the ground plane similar to that shown. A sufficient number of via holes should be used to connect the top and bottom ground planes. The evaluation circuit board shown is available from Hittite upon request.
[1] Reference this number when ordering complete evaluation PCB [2] Circuit Board Material: Rogers 4350
6 - 70
For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
HMC307QS16G / 307QS16GE
v07.0505
1dB LSB GaAs MMIC 5-BIT DIGITAL ATTENUATOR, DC - 4 GHz
Notes:
6
ATTENUATORS - SMT
For price, delivery, and to place orders, please contact Hittite Microwave Corporation: 20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
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