RF9908 RF Micro Devices, RF9908 Datasheet

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RF9908

Manufacturer Part Number
RF9908
Description
Manufacturer
RF Micro Devices
Datasheet

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Product Description
The RF9908 is a complete upconverter designed for
CDMA/FM cellular applications. The IC contains a dou-
ble-balanced mixer stage and an output buffer amplifier
stage. This device may also be used to directly BPSK
modulate a carrier. The mixer is a Gilbert cell with emitter
degeneration resistors to provide high IP
stage is a class-B, push-pull configuration to reduce the
overall current and still provide a good 50
The unit operates at 3.6V and does not require any exter-
nal matching components other than coupling capacitors.
This circuit is designed as part of the RFMD CDMA Chip
Set, consisting of a Transmit IF AGC Amp, this Transmit
Upconverter, a Receive LNA/Mixer, and a Receive IF
AGC Amp.
Optimum Technology Matching® Applied
Rev A2 010720
Typical Applicat ions
• CDMA/FM Cellular Systems
• Supports Dual-Mode AMPS/CDMA
• Supports Dual-Mode TACS/CDMA
Si BJT
Si Bi-CMOS
GND
LO+
IF+
IF-
1
2
3
4
Funct ional Block Diagram
ü
GaAs HBT
SiGe HBT
6
GaAs MESFET
Si CMOS
8
7
6
5
RF OUT
VCC
GND
LO-
3
output match.
. The output
CDMA/FM UPCONVERTER/BPSK MODULATOR
• Commercial and Consumer Systems
• 3-Cell Battery-Operated Systems
Feat ures
Ordering Infor mat ion
RF Micro Devices, Inc.
7628 Thorndike Road
Greensboro, NC 27409, USA
• Supports Dual Mode Operation
• +8dBm Input/Output Intercept Point
• Single 3.6V Power Supply
• Internally Matched Inputs and Outputs
• Buffered Output
• Double-Balanced Mixer
RF9908
RF9908 PCBA
8° MAX
0° MIN
0.196
0.189
xxxxx
xxxxx
xxxxx
0.034
0.016
Package St yle: SOIC-8
CDMA/FM Upconverter/BPSK Modulator
Fully Assembled Evaluation Board
0.157
0.150
0.244
0.229
Dimensions in mm
0.009
0.007
0.050
0.018
0.014
RF9908
NOTES:
1. Shaded lead is Pin 1.
2. All dimensions are excluding
3. Lead coplanarity -
mold flash.
0.005 with respect to datum "A".
http://www.rfmd.com
Fax (336) 664 0454
Tel (336) 664 1233
0.008
0.004
0.068
0.053
-A-
6-57
6

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RF9908 Summary of contents

Page 1

... CDMA/FM Cellular Systems • Supports Dual-Mode AMPS/CDMA • Supports Dual-Mode TACS/CDMA Product Description The RF9908 is a complete upconverter designed for CDMA/FM cellular applications. The IC contains a dou- ble-balanced mixer stage and an output buffer amplifier stage. This device may also be used to directly BPSK modulate a carrier ...

Page 2

... RF9908 Absolute Maximum Ratings Parameter Supply Voltage Input RF Power Operating Ambient Temperature Storage Temperature Parameter Overall RF Output Frequency Range Conversion Gain Noise Figure Output IP3 Output ACP 6 Output ALT Output VSWR Spurious Product Rejection IF Input IF Frequency Differential Input Impedance Output Isolation ...

Page 3

... RF Output Pin. This pin is internally DC blocked. The output impedance IF IF- 100 pF LO+ Rev A2 010720 Applicat ion Schemat 100 pF RF9908 Interface Schematic IF+ IF- BIAS See pin 1. LO+ LO- BIAS See pin 4. RF OUT RF OUT V CC 100 pF 100 nF 6-59 6 ...

Page 4

... RF9908 1 6-60 Evaluat ion Board Schemat ic (Download Bill of Materials from www.rfmd.com P1-1 VCC 2 GND NC 3 9908400 Rev - Evaluation Board Layout Board Size 1.4” x 1.4” Board Thickness 0.031”, Board Material FR-4 50 Microstrip RF OUT 8 J3 ...

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