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RF2629
10
Typical Applications
* 3V CDMA/FM Cellular Systems * 3V CDMA PCS Systems * 3V TDMA Cellular/PCS Systems * Supports Dual-Mode AMPS/CDMA * Supports Dual-Mode TACS/CDMA * Portable Battery-Powered Equipment
3V CDMA/FM TRANSMIT AGC AMPLIFIER
Product Description
The RF2629 is a complete AGC amplifier designed for the transmit section of 3V dual-mode CDMA/FM cellular and PCS applications. It is designed to amplify IF signals while providing more than 84dB of gain control range. Noise Figure, IP3, and other specifications are designed for CDMA and dual mode CDMA/AMPS handsets. This circuit is designed as part of the RFMD CDMA Chip Set, consisting of this Transmit IF AGC Amp, a Transmit Upconverter, a Receive LNA/Mixer, and a Receive IF AGC Amp. The IC is manufactured on an advanced high frequency Silicon Bipolar process and is packaged in a standard miniature 8-lead plastic MSOP package.
0.192 + 0.008 0.012 0.006 + 0.003 -A-
0.0256
0.118 + 0.004 sq. 6 MAX 0 MIN
0.034
NOTES: 1. Shaded lead is pin 1. 2. All dimensions are exclusive of flash, protrusions or burrs. 3. Lead coplanarity: 0.002 with respect to datum "A".
0.021 + 0.004
0.006 + 0.002
Optimum Technology Matching(R) Applied
Si Bi-CMOS
SiGe HBT
Si CMOS
* Supports Dual Mode Operation * Supports PCS and Cellular Applications * -48dB to +38dB Gain Control Range
IN+ 1 IN- 2 GND 3 GC 4 GAIN CONTROL 8 VCC1 7 VCC2 6 OUT+ 5 OUT-
* Single 3V Power Supply * 12MHz to 175MHz Operation * Miniature Surface Mount Package
Ordering Information
RF2629 RF2629 PCBA 3V CDMA/FM Transmit AGC Amplifier Fully Assembled Evaluation Board
Functional Block Diagram
RF Micro Devices, Inc. 7628 Thorndike Road Greensboro, NC 27409, USA
Tel (336) 664 1233 Fax (336) 664 0454 http://www.rfmd.com
Rev B4 010720
10-39
IF AMPLIERS
uSi BJT
Package Style: MSOP-8
10
GaAs HBT
GaAs MESFET
Features
RF2629
Absolute Maximum Ratings Parameter
Supply Voltage Control Voltage Input Power Levels Operating Ambient Temperature Storage Temperature
Rating
-0.5 to +7.0 -0.5 to +5.0 +10 -40 to +85 -40 to +150
Unit
VDC V 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
Specification Min. Typ. Max.
Unit
Condition
T=25C, 130MHz, VCC =3.0V, Pin=-40dBm, ZS =1k, ZL =1k, 1k External Output Terminating Resistor (Effective ZL =500) (See Application Example)
Overall
Frequency Range Maximum Gain Minimum Gain Gain Slope Gain Control Voltage Range Gain Control Input Impedance Noise Figure Input IP3 12 to 175 +38 -48 57 0 to 2.4 30 10.5 -25 -26 1 10:1 2.7 to 3.3 23 22 V mA mA MHz dB dB dB/V VDC k dB dBm dBm k
+35
-45
VGC =2.3V VGC =0.3V Measured in 0.5V increments
13
-26 -28
Input Impedance Stability (Max VSWR)
At maximum gain and 130MHz At +10dB gain and referenced to 1k, Pin=-45dBm per tone At +35dB gain and referenced to 1k, Pin=-45dBm per tone Differential Spurious<-70dBm
10
IF AMPLIERS
Power Supply
Voltage Current Consumption Current Consumption 25 24 Maximum gain, VCC =3.0V Minimum gain, VCC =3.0V
10-40
Rev B4 010720
RF2629
Pin 1 Function IN+ Description
Balanced input pin. This pin is internally DC-biased and should be DC blocked if connected to a device with a DC level, other than VCC, present. A DC to connection to VCC is acceptable. For single-ended input operation, one pin is used as an input and the other input is ACcoupled to ground. The balanced input impedance is 1k, while the single-ended input impedance is 500. Same as pin 2, except complementary input. Ground connection. For best performance, keep traces physically short and connect immediately to ground plane. Analog gain adjustment for all amplifiers. Valid control ranges are from 0V to 3.0V. Maximum gain is selected with 3.0V. Minimum gain is selected with 0V. These voltages are valid only for a 3.3k DC source impedance.
Interface Schematic
VCC
580 CDMA+
580 CDMA-
2 3 4
INGND GC
See pin 1 schematic.
VCC
12.7 k 23.5 k 15 k
5
OUT-
6 7
OUT+ VCC1
Balanced output pin. This is an open-collector output, designed to operate into a 500 balanced load. The load sets the operating impedOUT+ OUTance, but an external choke or matching inductor to VCC must also be supplied in order to correctly bias this output. This bias inductor is typically incorporated in the matching network between the output and next stage. Because this pin is biased to VCC, a DC-blocking capacitor must be used if the next stage's input has a DC path to ground. Same as pin 5, except complementary output. See pin 5 schematic. Supply voltage pin. External bypassing is required. The trace length between the pin and the bypass capacitors should be minimized. The ground side of the bypass capacitors should connect immediately to ground plane. Pins 7 and 8 may share one bypass capacitor if trace lengths are kept minimal. Same as pin 7.
10
IF AMPLIERS
8
VCC2
Rev B4 010720
10-41
RF2629
Application Schematic
Measurement Reference Plane ZS=1 k IN+ 10 nF INZIN=1 k GAIN 3.3 k 2 3 4 GAIN CONTROL 7 6 5 ZLOAD,EFF=500 R2 sets the balanced output impedance to 1 k . L1 and C2 serve dual purposes. L1 serves as an output bias choke, and C2 serves as a series DC block. In addition, the values of L1 and C2 may be chosen to form an impedance matching network if the load impedance is not 1 k . Otherwise, the values of L1 and C1 are chosen to form a parallel-resonant tank circuit at the IF when the IF filter's input impedance is 1 k . C1 L1 ZOUT=1 k VCC 10 nF Measurement Reference Plane C1 L1 C2 R2: 1 k C2 OUT-
10 nF 1 8
10 nF
VCC ZLOAD=1 k CDMA Filter OUT+
Evaluation Board Schematic
(Download Bill of Materials from www.rfmd.com.)
10
CDMA J1 SMA 50 strip T1 1
C3 5 pF C4 5 pF L2 270 nH
L1 270 nH C1 10 nF C2 10 nF 1 2 3 4 GAIN CONTROL
2629400, Rev A
C7 10 nF 8 7 6 5 R2 510 L3 100nH C6 10 nF C9 33 pF R3 510 L4 100nH
C10 10 nF VCC
IF AMPLIERS
C8 33 pF C11 22 pF T2 1 50 strip
OUT
J2 SMA
GC P1 P1-1 1 2 P1-3 3 VCC GND GC R1 3.3 k C5 1 nF
C12 22 pF
VCC
10-42
Rev B4 010720
RF2629
Evaluation Board Layout Board Size 2.750" x 2.000"
Board Thickness 0.031", FR-4
10
IF AMPLIERS
Rev B4 010720
10-43
RF2629
Gain versus Gain Control Voltage (VCC = 3.0 V, 130 MHz)
60.0 50.0 40.0 30.0 20.0 -10.0 -30 C +25 C +85 C 0.0 10.0 +25 C +85 C -30 C
IIP3 versus Gain (VCC = 3.0 V, 130 MHz)
Gain (dB)
0.0 -10.0 -20.0 -30.0 -40.0 -50.0 -60.0 0.0 0.5 1.0 1.5 2.0 2.5
IIP3 (dB)
10.0
-20.0
-30.0
-40.0
-50.0 -60.0
-40.0
-20.0
0.0
20.0
40.0
60.0
GC (Volts)
Gain (dB)
10
IF AMPLIERS
10-44
Rev B4 010720

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