RF2629 10 3V CDMA/FM TRANSMIT AGC AMPLIFIER Typical Applications • 3V CDMA/FM Cellular Systems • Supports Dual-Mode AMPS/CDMA • 3V CDMA PCS Systems • Supports Dual-Mode TACS/CDMA • 3V TDMA Cellular/PCS Systems • Portable Battery-Powered Equipment Product Description 0.012 Si Bi-CMOS GaAs HBT GaAs MESFET SiGe HBT Si CMOS -A- 0.0256 0.118 + 0.004 sq. 0.034 6° MAX 0° MIN 0.021 + 0.004 Optimum Technology Matching® Applied üSi BJT 0.006 + 0.003 0.192 + 0.008 0.006 + 0.002 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". 10 Package Style: MSOP-8 Features • Supports Dual Mode Operation • Supports PCS and Cellular Applications • -48dB to +38dB Gain Control Range IN+ 1 8 VCC1 IN- 2 7 VCC2 GND 3 6 OUT+ • Single 3V Power Supply • 12MHz to 175MHz Operation • Miniature Surface Mount Package GC 4 GAIN CONTROL 5 OUT- Ordering Information RF2629 RF2629 PCBA Functional Block Diagram Rev B4 010720 3V CDMA/FM Transmit AGC Amplifier Fully Assembled Evaluation Board RF Micro Devices, Inc. 7628 Thorndike Road Greensboro, NC 27409, USA Tel (336) 664 1233 Fax (336) 664 0454 http://www.rfmd.com 10-39 IF AMPLIERS 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. RF2629 Absolute Maximum Ratings Parameter Supply Voltage Control Voltage Input Power Levels Operating Ambient Temperature Storage Temperature Parameter Rating Unit -0.5 to +7.0 -0.5 to +5.0 +10 -40 to +85 -40 to +150 VDC V dBm °C °C Specification Min. Typ. Max. 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). Unit T=25°C, 130MHz, VCC =3.0V, Pin=-40dBm, ZS =1kΩ, ZL =1kΩ, 1kΩ External Output Terminating Resistor (Effective ZL =500Ω) (See Application Example) Overall Frequency Range Maximum Gain Minimum Gain Gain Slope Gain Control Voltage Range Gain Control Input Impedance Noise Figure Input IP3 Input Impedance Stability (Max VSWR) IF AMPLIERS 10 Condition -26 12 to 175 +38 -48 57 0 to 2.4 30 10.5 -25 -28 -26 dBm 1 kΩ +35 -45 13 MHz dB dB dB/V VDC kΩ dB dBm 10:1 VGC =2.3V VGC =0.3V Measured in 0.5V increments At maximum gain and 130MHz At +10dB gain and referenced to 1kΩ, Pin=-45dBm per tone At +35dB gain and referenced to 1kΩ, Pin=-45dBm per tone Differential Spurious<-70dBm Power Supply Voltage Current Consumption Current Consumption 10-40 2.7 to 3.3 23 22 25 24 V mA mA Maximum gain, VCC =3.0V Minimum gain, VCC =3.0V Rev B4 010720 RF2629 Pin 1 Function IN+ 2 3 INGND 4 GC 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 1kΩ, while the single-ended input impedance is 500Ω. 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 3.3kΩ DC source impedance. Interface Schematic VCC 580 Ω 580 Ω CDMA+ CDMA- See pin 1 schematic. VCC 12.7 kΩ 23.5 kΩ 15 kΩ 5 OUT- 6 7 OUT+ VCC1 VCC2 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 Balanced output pin. This is an open-collector output, designed to operate into a 500Ω 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. Rev B4 010720 10-41 RF2629 Application Schematic Measurement Reference Plane ZS=1 kΩ 10 nF 10 nF IN+ 1 8 2 7 3 6 VCC 10 nF IN- C1 ZLOAD=1 kΩ L1 C2 ZIN=1 kΩ GAIN 4 3.3 kΩ GAIN CONTROL CDMA Filter OUT+ R2: 1 kΩ C2 OUT- 5 ZLOAD,EFF=500 Ω R2 sets the balanced output impedance to 1 k Ω . 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 Ω . 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 Ω. C1 L1 ZOUT=1 kΩ Measurement Reference Plane VCC 10 nF Evaluation Board Schematic (Download Bill of Materials from www.rfmd.com.) 10 IF AMPLIERS CDMA J1 SMA 50 Ω µ strip C3 5 pF L1 270 nH C4 5 pF C1 10 nF VCC C2 10 nF GC 10-42 1 8 2 7 3 4 R1 3.3 kΩ P1 P1-3 C10 10 nF T1 1 L2 270 nH P1-1 C7 10 nF 1 VCC 2 GND 3 GC C5 1 nF R3 510 Ω L4 100nH 6 GAIN CONTROL 2629400, Rev A C8 33 pF C9 33 pF OUT C11 22 pF 50 Ω µ strip T2 J2 SMA 1 5 R2 510 Ω L3 100nH C6 10 nF C12 22 pF VCC Rev B4 010720 RF2629 Evaluation Board Layout Board Size 2.750" x 2.000" Board Thickness 0.031”, FR-4 IF AMPLIERS 10 Rev B4 010720 10-43 RF2629 Gain versus Gain Control Voltage (VCC = 3.0 V, 130 MHz) IIP3 versus Gain (VCC = 3.0 V, 130 MHz) 60.0 10.0 -30 C 50.0 +25 C +25 C 40.0 +85 C 0.0 +85 C -30 C 30.0 -10.0 10.0 IIP3 (dB) Gain (dB) 20.0 0.0 -10.0 -20.0 -20.0 -30.0 -30.0 -40.0 -40.0 -50.0 -60.0 0.0 0.5 1.0 GC (Volts) 1.5 2.0 2.5 -50.0 -60.0 -40.0 -20.0 0.0 20.0 40.0 60.0 Gain (dB) IF AMPLIERS 10 10-44 Rev B4 010720