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RF2365
4
Typical Applications * DCS GSM * PCS CDMA * PCS TDMA * 2.4GHz Systems * General Purpose Amplification * Commercial and Consumer Systems
3V LOW NOISE AMPLIFIER
Product Description
The RF2365 is a low noise amplifier with a high dynamic range designed for the receive front end of digital cellular applications at PCS/DCS frequencies. It is designed to amplify low level signals with minimum noise contribution while operating in the harsh, interference-rich environments of newly deployed digital subscriber units. The part provides excellent performance as a LNA for 2.4GHz radio applications. The IC is featured in a standard SOT5-lead plastic package.
1.60 + 0.01 0.400
1
4
GENERAL PURPOSE AMPLIFIERS
0.15 0.05
2.90 + 0.10
0.950
2.80 + 0.20 3 MAX 0 MIN 0.45 + 0.10 0.127
1.44 1.04
Dimensions in mm.
Optimum Technology Matching(R) Applied
Si BJT Si Bi-CMOS
!
Package Style: SOT 5-Lead
GaAs HBT SiGe HBT
GaAs MESFET Si CMOS
Features * 1.6dB Noise Figure @ 1850MHz * 1.75dB Noise Figure @ 2450MHz * 18.0dB Gain at PCS/DCS
RF IN
1
5
RF OUT
* 15.5dB Gain at 2.45GHz * External Bias Control * Extremely Small SOT23-5 Package
GND1
2
PD
3
4
GND2
Ordering Information
RF2365 RF2365 PCBA 3V Low Noise Amplifier Fully Assembled Evaluation Board
Functional Block Diagram
RF Micro Devices, Inc. 7625 Thorndike Road Greensboro, NC 27409, USA
Tel (336) 664 1233 Fax (336) 664 0454 http://www.rfmd.com
Rev A4 001201
4-215
RF2365
Absolute Maximum Ratings Parameter
Supply Voltage Input RF Level Operating Ambient Temperature Storage Temperature
Rating
-0.5 to +8.0 +10 -40 to +85 -40 to +150
Unit
VDC dBm C C
Caution! ESD sensitive device.
RF Micro Devices believes the furnished information is correct and accurate at the time of this printing. However, RF Micro Devices reserves the right to make changes to its products without notice. RF Micro Devices does not assume responsibility for the use of the described product(s).
Parameter
Overall
Specification Min. Typ. Max.
1500 2500
Unit
MHz
Condition
4
GENERAL PURPOSE AMPLIFIERS
RF Frequency Range
PCS Performance
Gain Noise Figure Off Mode Gain |S12| Input IP3 16 18 1.6 -15 25 -3.5 +2.0 +4.0 Output IP3 Input VSWR Output VSWR 20.0 22.0 1.7 1.4 28.0 20 dB dB dB dB dBm dBm dBm dBm
Schematic per 1.9GHz LNA Application Schematic, VPD = 3.0 VCC = 3.0V, T=25C VCC =3.0V, ICC =8.0mA VCC =3.0V, VPD =0 VCC =3.0V, ICC =5.0mA, R1 =150 (see application schematic) VCC =3.0V, ICC =6.5mA, R1 =75 (see application schematic) VCC =3.0V, ICC =8.0mA, R1 =0 (see application schematic) VCC =3.0V, ICC =8.0mA, R1 =0 (see application schematic)
2.4GHz Performance
Gain Noise Figure Input IP3 Input VSWR Output VSWR 15.5 1.75 +2.0 1.3 1.75 3 8.0 6.5 5.0 dB dB dBm
Schematic per 2.4GHz LNA Application Schematic T=25C VCC =3.0V, ICC =8.0mA VCC =3.0V, ICC =8.0mA
Power Supply
Voltage (VCC) Current Consumption 5.0 11.0 V mA mA mA A
T = 25 C VCC =3.0V, IIP3=+4.0dBm VCC =3.0V, IIP3=+2.0dBm VCC =3.0V, IIP3=-3.5dBm VCC =3.0V; VPD 0.9V
Power Down
0
1
4-216
Rev A4 001201
RF2365
Pin 1 Function RF IN Description
RF input pin. This pin is DC coupled.
To Bias Circuit RF IN GND1
Interface Schematic
PD
2 3
GND1 PD
Ground connection. See evaluation board schematic notes. Power down pin. This pin serves as the interstage for the 2-stage LNA. An inductor is required to pull pin 3 to VCC (see application schematic). If desired, this voltage can be lowered to trade off IP3 versus ICC,TOTAL. (See table below.)
PD
To RF Stages
4
GENERAL PURPOSE AMPLIFIERS
4 5
GND2 RF OUT
Ground connection. See evaluation board schematic notes. Amplifier Output pin. This pin is an open-collector output. It must be biased to either VCC or pin 4 through a choke or matching inductor. This pin is typically matched to 50 with a shunt bias/matching inductor and series blocking/matching capacitor. Refer to application schematics.
To Bias Circuit
GND2
R1
0 75 150
IIP3
+4.0dBm +2.0dBm -3.5dBm
ICC 8.0mA 6.5mA 5.0mA
Rev A4 001201
4-217
RF2365
Application Schematic - 1.9GHz
47 pF
VCC
3.9 nH RF IN 22 nF 1 5 1 pF 2 0 EN 47 pF 3.3 nH 3 4 RF OUT
4
GENERAL PURPOSE AMPLIFIERS
Application Schematic - 2.4GHz
NOTES: * R1 is left open.
22 pF
VCC
3.9 nH RF IN 22 nF 2 2.2 nH EN 22 pF R1* 3 4 1 5 1.5 pF RF OUT
4-218
Rev A4 001201
RF2365
Evaluation Board Schematic - 1.9GHz
(Download Bill of Materials from www.rfmd.com.)
P1 1 P 1 -2 2 GND VCC P 2 -2 C1 22 nF 1 P2 1 2 GND EN
2365400, Rev A
C2 47 pF L2 3 .9 n H 5 C4 1 pF
C3 10 nF VCC
J1 R F IN
5 0 strip
5 0 strip
J2 RF OUT
* R1 0 EN C6 10 nF C5 47 pF L1 3 .3 n H
2
4
4 *
3
NOTES: *G ro u n d tra ce s o n p in s 2 a n d 4 a re e q u iva le n t to a 1 .8 n H in d u cto r. If a n in d u cto r is n o t u se d , th e d im e n sio n s a re a s fo llo w s: L e n g th = 1 4 0 m ils W id th = 2 0 m ils H e ig h t = 3 1 m ils fro m th e g o u n d p la n e . D ie le ctric is F R -4 .
Evaluation Board Schematic - 2.4GHz
P1 1 P 1-2 2 GND VCC P 2-2 C1 22 nF 1 P2 1 2 GND EN
2 36 54 01 , R e v -
C2 22 pF L2 3.9 nH 5 C4 1.5 pF
C3 10 nF VCC
J1 R F IN
50 strip
50 strip
J2 RF O UT
** L1 2.2 nH EN C6 10 nF C5 22 pF R 1*
2
3
4
N OTES: * R 1 is left o p en . **G ro u nd trace o n p in 2 is e qu iva le nt to a 1.0 n H in d ucto r. If a n in du ctor is n ot u se d, th e dim e nsio ns a re a s fo llo w s: L en g th = 8 5 m ils W idth = 2 0 m ils H eig ht = 3 1 m ils from th e go u nd p la n e. D ie le ctric is F R -4 .
Rev A4 001201
4-219
GENERAL PURPOSE AMPLIFIERS
RF2365
Evaluation Board Layout Board Size 1" x 1" 1.9GHz
Board Thickness 0.031"; Board Material FR-4
4
GENERAL PURPOSE AMPLIFIERS
2.4GHz
4-220
Rev A4 001201
RF2365
Gain versus Frequency and VCC (Temp = +25C, RF IN = -36 dBm)
18.80 18.60 18.40 18.20 Gain, 2.8V Gain, 3.0V Gain, 3.2V 19.20 19.00 18.80 18.60 18.40 18.20 18.00
Gain versus Frequency and Temp (VCC = 2.8 V, RF IN = -35 dBm)
Gain, -40C Gain, +25C Gain, +85C
Gain (dB)
18.00 17.80 17.60 17.40 17.20 17.00 16.80 1805.00 1823.75 1842.50 1861.25 1880.00
Gain (dB)
17.80 17.60 17.40 17.20 17.00 16.80 16.60 16.40 16.20 16.00 1805.00 1823.75 1842.50 1861.25 1880.00
4
GENERAL PURPOSE AMPLIFIERS
Frequency (MHz)
Frequency (MHz)
-2.20 -2.40 -2.60 -2.80 -3.00 -3.20 -3.40 -3.60 -3.80 -4.00 -4.20 -4.40 -4.60 -4.80 -5.00 -5.20 -5.40 -5.60 -5.80 -6.00 -6.20 -6.40 -6.60 -6.80 -7.00 -7.20 1805.00
Input P1dB versus Frequency and VCC (Temp = +25C)
IP1dB, 2.8V IP1dB, 3.0V IP1dB, 3.2V
-2.80 -3.00 -3.20 -3.40 -3.60 -3.80 -4.00 -4.20 -4.40 -4.60 -4.80 -5.00 -5.20 -5.40 -5.60 -5.80 -6.00 -6.20 -6.40 -6.60 -6.80 -7.00 -7.20 -7.40 -7.60 -7.80 -8.00 1805.00
Input P1dB versus Frequency and Temp (VCC = 2.8 V)
IP1dB, -40C IP1dB, +25C IP1dB, +85C
Input P1dB (dBm)
1823.75
1842.50
1861.25
1880.00
Input P1dB (dBm)
1823.75
1842.50
1861.25
1880.00
Frequency (MHz)
Frequency (MHz)
7.50 7.00 6.50 6.00 5.50 5.00
IIP3 versus Frequency and VCC (Temp = +25C)
IIP3, 2.8V IIP3, 3.0V IIP3, 3.2V
4.50 4.00 3.50 3.00 2.50 2.00 1.50 1.00 0.50 1805.00 1823.75 1842.50 1861.25 1880.00
6.00 5.50 5.00 4.50 4.00 3.50 3.00 2.50 2.00 1.50 1.00 0.50 0.00 -0.50 -1.00 -1.50 -2.00 -2.50 -3.00 -3.50 -4.00 -4.50 1805.00
IIP3 versus Frequency and Temp (VCC = 2.8 V)
IIP3, -40C IIP3, +25C IIP3, +85C
IIP3 (dBm)
IIP3 (dBm)
1823.75
1842.50
1861.25
1880.00
Frequency (MHz)
Frequency (MHz)
Rev A4 001201
4-221
RF2365
ICC versus VCC and Temp
10.50 10.00 9.50 9.00 Icc, -40C Icc, +25C Icc, +85C 1.33 1.34
Noise Figure versus Frequency and VCC (Temp = Ambient)
NF, 2.8V NF, 3.0V NF, 3.2V
ICC (mA)
8.00 7.50 7.00 6.50
Noise Figure (dB)
8.50
1.32
1.31
1.30
4
GENERAL PURPOSE AMPLIFIERS
6.00 5.50 5.00 4.50 2.80 3.00 3.20 1.28 1805.00 1823.75 1842.50 1861.25 1880.00 1.29
VCC
Frequency (MHz)
Input/Output Impedance @ 2.8 V
1.0
0.6
Swp Max 3.5GHz
2. 0
0.8
10.0
0.2
0.4
0.6
0.8
1.0
2.0
3.0
4.0
5.0
0
-0
.4
-0.
6
.0 -2
Swp Min 0.1GHz
-0.8
4-222
-1.0
-5.0
-0.2
-10.0
-4.
0
-3
.0
0.
4
0.2
3.0
4.0
5.0
10.0
S[1,1]
S[2,2]
Rev A4 001201

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