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 Preliminary
RF2376
CELLULAR TDMA/CDMA LINEAR VARIABLE GAIN AMPLIFIER
Package: SOT23-6
Features
50dB Linear Gain Control Range 27dB Maximum Gain Single 2.7V to 3.3V Supply 30mA Supply Current High Linearity 7dB Noise Figure
RF OUT GND GC
1 2 3 ATTEN
6 5 4
VCC GND RF IN
Applications
CDMA Cellular Handsets TDMA Cellular Handsets
Functional Block Diagram
Product Description
The RF2376 is a linear variable gain amplifier suitable for use in TDMA and CDMA systems in the cellular band. The features of this device include linear gain control, high gain, and low noise figure. The IC is manufactured on an advanced Gallium Arsenide Heterojunction Bipolar Transistor (GaAs HBT) process and is featured in an industry-standard miniature 6-lead plastic SOT package.
Ordering Information
RF2376Cellular TDMA/CDMA Linear Variable Gain Amplifier
RF2376 PCBA
Fully Assembled Evaluation Board
Optimum Technology Matching(R) Applied
GaAs HBT GaAs MESFET InGaP HBT SiGe BiCMOS Si BiCMOS SiGe HBT GaAs pHEMT Si CMOS Si BJT GaN HEMT
RF MICRO DEVICES(R), RFMD(R), Optimum Technology Matching(R), Enabling Wireless ConnectivityTM, PowerStar(R), POLARISTM TOTAL RADIOTM and UltimateBlueTM are trademarks of RFMD, LLC. BLUETOOTH is a trademark owned by Bluetooth SIG, Inc., U.S.A. and licensed for use by RFMD. All other trade names, trademarks and registered trademarks are the property of their respective owners. (c)2006, RF Micro Devices, Inc.
Rev A2 DS010829
7628 Thorndike Road, Greensboro, NC 27409-9421 * For sales or technical support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
1 of 10
RF2376
Absolute Maximum Ratings Parameter
Supply Voltage DC Current Operating Ambient Temperature Storage Temperature
Preliminary
Rating
0 to +5.0 100 -20 to +85 -40 to +150
Unit
VDC mA C C
Caution! ESD sensitive device.
Exceeding any one or a combination of the Absolute Maximum Rating conditions may cause permanent damage to the device. Extended application of Absolute Maximum Rating conditions to the device may reduce device reliability. Specified typical performance or functional operation of the device under Absolute Maximum Rating conditions is not implied. RoHS status based on EUDirective2002/95/EC (at time of this document revision). The information in this publication is believed to be accurate and reliable. However, no responsibility is assumed by RF Micro Devices, Inc. ("RFMD") for its use, nor for any infringement of patents, or other rights of third parties, resulting from its use. No license is granted by implication or otherwise under any patent or patent rights of RFMD. RFMD reserves the right to change component circuitry, recommended application circuitry and specifications at any time without prior notice.
Parameter
Overall
Operating Frequency Usable Frequency Range Maximum Small Signal Gain Linear Gain Control Range Gain Control Slope Input VSWR Output IP3 Noise Figure Maximum Average Output Power Adjacent Channel Power Rejection Alternate Channel Power Rejection Maximum Average Output Power Adjacent Channel Power Rejection
Min.
Specification Typ.
836 800 to >1000
Max.
Unit
MHz MHz
Condition
VCC =2.8V, VGC =2.0V, T=25C
24 50
27 70 1.5:1
30
dB dB dB/V Maximum gain. Over entire gain control range dBm dB dBm Maximum gain TDMA modulation TDMA modulation; POUT =+8dBm TDMA modulation; POUT =+8dBm CDMA modulation; VCC =3.0V, maximum gain setting, ACPR<-52dBc. CDMA modulation; VCC =3.0V. For PIN >-23dBm, adjustment of PIN is required to maintain ACPR performance over gain control range. For PIN < -23dBm, ACPR performance is maintained over entire gain control range. CDMA modulation; POUT =+10dBm, VCC =3.0V. T = 25C Specifications Operating range VCC =2.8V, VGC =2.0V VCC =3.0V, VGC =2.0V VCC =2.8V, VGC =0.4V
2.5:1
+22
+25 7 +8 -33 -61 +10 -53 -32 -57
dBc dBc dBm dBc
Alternate Channel Power Rejection
-67
dBc
Power Supply
Supply Voltage Gain Control Voltage Supply Current 25 2.8 2.7 to 3.3 0 to 2.0 30 34 18 VGC Current 1.5 40 V V V mA mA mA mA
2 of 10
7628 Thorndike Road, Greensboro, NC 27409-9421 * For sales or technical support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
Rev A2 DS010829
Preliminary
Pin 1 2 3 4 5 6 Function RF OUT GND GC RF IN GND VCC Description
RF output pin. This pin is DC coupled and requires VCC through a bias inductor sized accordingly to provide a high pass transformation with a series capacitor. Ground connection. Keep traces physically short and connect immediately to ground plane for best performance. Analog gain control pin. This pin controls the gain of the IC. Minimum gain occurs at VGC <0.4V and maximum gain is achieved with VGC =2.0V. 50dB of linear gain control with little variation of input P1dB is available. RF input pin. This pin is AC coupled. Ground connection. Keep traces physically short and connect immediately to ground plane for best performance. Power supply. This pin should be connected to a regulated supply and requires a bypass capacitor. Voltage is supplied through this pin to the first stage collector; this voltage also controls the bias. Gain may be tuned by adjusting the value of the feed inductor.
RF2376
Interface Schematic
Rev A2 DS010829
7628 Thorndike Road, Greensboro, NC 27409-9421 * For sales or technical support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
3 of 10
RF2376
Preliminary
Package Drawing SOT23-6
1.80 1.40 0.50 0.35 0.10 MAX.
TEXT*
1.90
3.10 2.70
3.00 2.60
Shaded lead is pin 1.
Dimensions in mm.
1.30 1.00
0.90 0.70
9 1
0.25 0.10 0.37 MIN.
*When Pin 1 is in upper left, text reads downward (as shown).
Application Schematic
47 nH RF IN 4 5 4.7 nH VCC 47 nF Note orientation of package in this schematic. 6 1 12 nH VCC ATTEN 3 2 2.7 pF RF OUT GC
4 of 10
7628 Thorndike Road, Greensboro, NC 27409-9421 * For sales or technical support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
Rev A2 DS010829
Preliminary
Evaluation Board Schematic
P1 P1-1 1 2 P1-3 P1-4 3 4 5 CON5 C2* J1 RF IN L1 6.8 nH C5 47 nF L3 12 nH C7 100 pF C6 2.7 pF VGC GND VREG/VCC VREG/VCC GND C9 33 pF C4 47 nH VREG/VCC C16 1 uF +
RF2376
4 5 6
2376400B
3 ATTEN 2 1 Note orientation of package in this schematic.
VGC R1* DNI
C1 100 pF
VREG
L2 4.7 nH
J2 RF OUT
C3 47 nF
C8 33 pF
Rev A2 DS010829
7628 Thorndike Road, Greensboro, NC 27409-9421 * For sales or technical support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
5 of 10
RF2376
Preliminary
Evaluation Board Layout Board Size 2.0" x 2.0"
Board Thickness 0.028"; Board Material FR-4
6 of 10
7628 Thorndike Road, Greensboro, NC 27409-9421 * For sales or technical support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
Rev A2 DS010829
Preliminary
Gain versus VGC (CDMA)
40.0
RF2376
Noise Figure versus VGC @ Room Temperature
30.0
(Frequency 836MHz @ -18dBm, VCC=3.0V, VGC=2.0V to 0.0V)
Gain[dB]@-40C
(Frequency 836MHz, VCC=3.0V, VGC=2.0V to 0.5V)
30.0
Gain[dB]@+25C Gain[dB]@+85C
25.0
NF [dB]
20.0
Gain (dB)
10.0
Noise Figure (dB)
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0
20.0
15.0
0.0
-10.0
10.0
-20.0
5.0
-30.0 0.0 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0
VGC (V)
VGC (V)
4.5 4.0 3.5 3.0
VSWR versus VGC @ Room Temperature (Frequency 836MHz, VCC=3.0V, VGC=2.0V to 0.1V)
RF INPUT PORT [S11] RF OUTPUT PORT [S22]
ACPR versus VGC (CDMA)
0.0
(Frequency 836MHz @ -18dBm, VCC=3.0V, VGC=2.0V to 0.0V)
ACPR[dBc]@-40C
-10.0
ACPR[dBc]@+25C ACPR[dBc]@+85C
Adjacent Channel Power (dBc)
-20.0
VSWR S11
2.5 2.0 1.5 1.0
-30.0
-40.0
-50.0
-60.0 0.5 -70.0 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0
VGC (V)
VGC (V)
Alternate Channel Power versus VGC (CDMA)
0.0 -10.0
Gain versus VGC (Single Tone Test)
40.0 30.0 20.0 10.0
(Frequency 836MHz @ -18dBm, VCC=3.0V, VGC=2.0V to 0.0V)
Altr.Ch.Power[dBc]@-40C Altr.Ch.Power[dBc]@+25C Altr.Ch.Power[dBc]@+85C
(RF Frequency 836MHz @ -17dBm, VCC=3.0V, VGC=2.0V to 0.0V)
Gain [dB] @ -40C Gain [dB] @ +25C Gain [dB] @ +85C
Alternate Channel Power (dBc)
-20.0 -30.0 -40.0 -50.0 -60.0 -70.0 -80.0 -90.0 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0
Gain (dB)
0.0 -10.0 -20.0 -30.0 -40.0 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0
VGC (V)
VGC (V)
Rev A2 DS010829
7628 Thorndike Road, Greensboro, NC 27409-9421 * For sales or technical support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
7 of 10
RF2376
1500.0 1000.0 500.0 0.0 Igc [uA]
Preliminary
IGC versus VGC (VCC=3.0V, VGC=2.0V to 0.0V) Gain & OIP3 versus VGC
40.0 30.0 20.0 10.0
(CDMA Frequency 836MHz, VCC=3.0V, VGC=2.0V to 0.0V)
Gain [dB] OIP3 [dBm]
IGC (uA)
-500.0 -1000.0 -1500.0 -2000.0 -2500.0 -3000.0 0. 0. 0. 0. 0. 0. 0. 0. 0. 0. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 2. 012345678901234567890
Gain (dB)
0.0 -10.0 -20.0 -30.0 -40.0 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0
VGC (V)
VGC (V)
Gain versus Input Power
40.0
Output Power versus Input Power
30.0 20.0 10.0
(Frequency 836MHz, VCC=3.0V)
Gain[dB]@Vgc 2.0V Gain[dB]@Vgc 1.5V Gain[dB]@Vgc 1.0V Gain[dB]@Vgc 0.5V Gain[dB]@Vgc 0.3V
(Frequency 836MHz, VCC=3.0V, VGC=2.0V)
30.0
20.0
10.0
Output Power (dBm)
0.0 -10.0 -20.0 -30.0 -40.0 -50.0 -60.0 Pout[dBm]@Vgc 2.0V Pout[dBm]@Vgc 1.5V Pout[dBm]@Vgc 1.0V Pout[dBm]@Vgc .5V Pout[dBm]@Vgc 0.3V
Gain (dB)
0.0
-10.0
-20.0
-30.0
-40.0 -25.0 -20.0 -15.0 -10.0 -5.0 0.0 5.0 10.0
-25.0
-20.0
-15.0
-10.0
-5.0
0.0
5.0
10.0
Input Power (dBm)
Input Power (dBm)
8 of 10
7628 Thorndike Road, Greensboro, NC 27409-9421 * For sales or technical support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
Rev A2 DS010829
Preliminary
RF2376
Rev A2 DS010829
7628 Thorndike Road, Greensboro, NC 27409-9421 * For sales or technical support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
9 of 10
RF2376
Preliminary
10 of 10
7628 Thorndike Road, Greensboro, NC 27409-9421 * For sales or technical support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
Rev A2 DS010829


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