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RF2373
0
RoHS Compliant & Pb-Free Product Typical Applications * WLAN LNA/Driver * GPS LNA * CDMA PCS LNA Product Description
The RF2373 is a low noise amplifier with a very high dynamic range designed for WLAN and digital cellular applications. The device functions as an outstanding front end low noise amplifier or driver amplifier in the transmit chain of digital subscriber units where low transmit noise power is a concern. When used as an LNA, the bias current can be set externally. When used as a PA driver, the IC can operate directly from a single cell Li-ion battery and includes a power down feature that can be used to completely turn off the device. The IC is featured in a standard SOT 5-lead plastic package.
1.60 + 0.01 0.400
1
3V LOW NOISE AMPLIFIER/ 3V DRIVER AMPLIFIER
* Low Noise Transmit Power Amplifier * General Purpose Amplification * Driver Amplifier for TX Power Amplifier
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 InGaP/HBT GaAs HBT SiGe HBT GaN HEMT GaAs MESFET Si CMOS SiGe Bi-CMOS
Package Style: SOT 5-Lead
Features * Low Noise and High Intercept Point * Adjustable Bias Current * Power Down Control * Single 1.8V to 6.0V Power Supply
RF IN 1
5 GND2
* 400MHz to 3GHz Operation * Extremely Small SOT 5-Lead Package
GND1 2
BIAS 3
4 RF OUT
Ordering Information
RF2373 3V Low Noise Amplifier/ 3V Driver Amplifier RF2373PCK-414 Fully Assembled Evaluation Board with 5 Sample Parts
RF Micro Devices, Inc. 7628 Thorndike Road Greensboro, NC 27409, USA Tel (336) 664 1233 Fax (336) 664 0454 http://www.rfmd.com
Functional Block Diagram
Rev A5 060907
4-1
RF2373
Absolute Maximum Ratings Parameter Rating Unit
Caution! ESD sensitive device.
RF Micro Devices believes the furnished information is correct and accurate at the time of this printing. RoHS marking based on EUDirective2002/95/EC (at 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).
Supply Voltage -0.5 to +6.0 VDC Bias Voltage, VBIAS +10dBm, a small dropping resistor of 10 is recommended in series with the VCC.
Parameter
Overall
Supply Voltage (VCC) Bias Voltage (VBIAS) RF Frequency Range Power Down Current Isolation Current Drain IP2
Min.
2.7 2.7
Specification Typ. Max.
3.3 3.3 800 to 2500 23 14 18 55 5.0 5.0 10
Unit
Condition
25C, VCC =3.3V, at typical frequencies unless otherwise specified
(LNA) (Driver)
8 12
19 23
V V MHz A dB mA mA dBm
VBIAS =0V
Cellular Low Noise Amplifier
Frequency Gain Noise Figure IIP3 IP1dB Input VSWR Output VSWR 820 19.5 -3 -13 880 21.5 1.1 -1 -11 2.0 4.0 1575 19.0 1.1 5 -5 1.7 1.6 1920 18.0 1.2 6 -5 1.8 1.6 960 23.5 1.3 MHz dB dB dBm dBm ICC =10mA
2.5 4.5 MHz dB dB dBm dBm
GPS Low Noise Amplifier
Frequency Gain Noise Figure IIP3 IP1dB Input VSWR Output VSWR 17.0 3 -7 21.0 1.3 ICC =10mA
2.2 2.1 1990 20.0 1.4 MHz dB dB dBm dBm
PCS Low Noise Amplifier
Frequency Range Gain Noise Figure IIP3 IP1dB Input VSWR Output VSWR 1850 16.0 4 -7 ICC =10mA
2.3 2.1
4-2
Rev A5 060907
RF2373
Parameter
W-CDMA Low Noise Amplifier
Frequency Range Gain Noise Figure IIP3 IP1dB Input VSWR Output VSWR 1920 15.5 6 -3 2045 17.5 1.2 8 -1 1.8 1.6 2170 19.5 1.4 MHz dB dB dBm dBm ICC =10mA
Specification Min. Typ. Max.
Unit
Condition
2.3 2.1
WLAN Low Noise Amplifier
Frequency Gain Noise Figure IIP3 P1dB Input VSWR Output VSWR 2400 13.0 7.5 -5.5 2450 15.0 1.3 9.5 -3.5 1.7 1.1 880 22.0 1.2 21 11 2.0 4.0 1920 18.5 1.3 23.5 12.5 1.8 1.6 2045 17.5 1.3 25.5 16.5 1.8 1.6 2450 15.5 1.4 25 12 1.7 1.1 2500 17.0 1.5 MHz dB dB dBm dBm ICC =10mA
2.2 1.6 960 24.0 1.4 MHz dB dB dBm dBm
Cellular Driver
Frequency Gain Noise Figure OIP3 OP1dB Input VSWR Output VSWR 820 20.0 19 9 ICC =18mA
2.5 4.5 1990 20.5 1.5 MHz dB dB dBm dBm
PCS Driver
Frequency Range Gain Noise Figure OIP3 OP1dB Input VSWR Output VSWR 1850 16.5 21.5 10.5 ICC =18mA
2.3 2.1 2170 20.0 1.5 MHz dB dB dBm dBm
W-CDMA Driver
Frequency Range Gain Noise Figure OIP3 OP1dB Input VSWR Output VSWR 1920 15.0 23.5 14.5 ICC =18mA
2.3 2.1 2500 17.5 1.6 MHz dB dB dBm dBm
WLAN Driver
Frequency Gain Noise Figure OIP3 OP1dB Input VSWR Output VSWR 2400 13.5 23 10 ICC =18mA
2.2 1.6
Rev A5 060907
4-3
RF2373
Pin 1 Function RF IN Description
RF input pin. This pin is DC coupled.
To Bias Circuit RF OUT RF IN
Interface Schematic
2 3
GND1 BIAS
Ground connection. For best performance, keep traces physically short and connect immediately to ground plane. This pin is used to control the bias current. An external resistor can be used to set the bias current for any VBIAS voltage. See table with evaluation board schematic.
VBIAS
4
RF OUT
5
GND2
Amplifier output pin. This pin is an open-collector output. It must be biased to VCC 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. Ground connection. For best performance, keep traces physically short and connect immediately to ground plane.
4-4
Rev A5 060907
RF2373
Evaluation Board Schematic
C2 22 nF LNA IN C1 0.5 pF 2 C6* R1* VPD C3
Do Not Place
1
5
3
4 L1* C7* VCC
LNA OUT
* Refer to table for the values
C4 100 pF C5 10 nF
Component L1 (nH) C6 (pF) C7 (pF)
Cellular GPS PCS W-CDMA WLAN 900 MHz 1575 MHz 1950 MHz 2140 MHz 2450 MHz 3.9 4.3 2.0 2.7 1.5 1.2 2.7 0.5 1.0 2.7 DNP 1.0 2.2 DNP 1.0
P1 P1-1 1 2 P1-3 3 HDR_3 VPD GND VCC
VPD 2.7 3.0 3.3 3.6 4.0 4.5
ICC ICC ICC R1 = 300 R1 = 430 R1 = 560 12 16 20 25 31 Over Limit 9 12 15 19 24 31 7 9 11 14 18 23
ICC R1 = 1 k 5 6 7 8 10 13
ICC R1 = 1.5 k 4 5 5 6 7 8 10
5.0 Over Limit Over Limit 29 16 Note: VCC set to 3.3 V. ICC only slightly dependent on VCC.
Rev A5 060907
4-5
RF2373
This information pertains to the following charts. Test condition unless otherwise specified: VCC =3.3V, use evaluation board for corresponding frequencies.
Collector Current versus VBIAS
35.0
(R1 = 560 ohms)
30.0
25.0
IC (mA)
20.0
15.0
10.0
5.0
-40C +25C +85C
0.0 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
VBIAS (V)
4-6
Rev A5 060907
RF2373
Noise Figure versus Collector Current
LNA 880 MHz
1.8 1.6 24.5 1.4 24.0 1.2 25.0
Gain versus Collector Current
LNA 880 MHz
Noise Figure (dB)
Gain (dB)
-40C
1.0 0.8 0.6
23.5
23.0
22.5 0.4 22.0 -40C +25C +85C 21.5 0.0 5.0 10.0 15.0 20.0 25.0 30.0 0.0 5.0 10.0 15.0 20.0 25.0 30.0 0.2 0.0 +25C +85C
IC (mA)
IC (mA)
Noise Figure versus Collector Current
1575 MHz
1.8 1.6 1.4 1.2 19.0 1.0 0.8 0.6 0.4 -40C 0.2 0.0 0.0 5.0 10.0 15.0 20.0 25.0 30.0 +25C +85C 16.5 0.0 5.0 17.0 17.5 20.5
Gain versus Collector Current
1575 MHz
20.0
19.5
Noise Figure (dB)
Gain (dB)
18.5
18.0
-40C +25C +85C 10.0 15.0 20.0 25.0 30.0
IC (mA)
IC (mA)
Noise Figure versus Collector Current
1920 MHz
1.8 1.6 18.5 1.4 18.0 1.2 19.0
Gain versus Collector Current
1920 MHz
Noise Figure (dB)
Gain (dB)
-40C
1.0 0.8 0.6
17.5
17.0
16.5 0.4 16.0 -40C +25C +85C 15.5 0.0 5.0 10.0 15.0 20.0 25.0 30.0 0.0 5.0 10.0 15.0 20.0 25.0 30.0 0.2 0.0
+25C +85C
IC (mA)
IC (mA)
Rev A5 060907
4-7
RF2373
Noise Figure versus Collector Current
2025 MHz
1.8 1.6 19.0 1.4 18.5 1.2 19.5
Gain versus Collector Current
2025 MHz
Noise Figure (dB)
Gain (dB)
-40C
1.0 0.8 0.6
18.0
17.5
17.0 0.4 16.5 -40C +25C +85C 16.0 0.0 5.0 10.0 15.0 20.0 25.0 30.0 0.0 5.0 10.0 15.0 20.0 25.0 30.0 0.2 0.0
+25C +85C
IC (mA)
IC (mA)
Noise Figure versus Collector Current
2450 MHz
2.0 1.8 1.6 1.4 17.5 17.0 16.5 16.0
Gain versus Collector Current
2450 MHz
Noise Figure (dB)
Gain (dB)
-40C +25C +85C
1.2 1.0 0.8
15.5 15.0 14.5
0.6 0.4 0.2 0.0 0.0 5.0 10.0 15.0 20.0 25.0 30.0 14.0 -40C 13.5 13.0 0.0 5.0 10.0 15.0 20.0 25.0 30.0 +25C +85C
IC (mA)
IC (mA)
4-8
Rev A5 060907

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