rf9938 RF Micro Devices, rf9938 Datasheet

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rf9938

Manufacturer Part Number
rf9938
Description
Pcs Upconverter/bpsk Modulator
Manufacturer
RF Micro Devices
Datasheet

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RF9938
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Product Description
The RF9938 is a complete upconverter designed for PCS
applications. The IC contains a double-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 resis-
tors to provide high IP
push-pull configuration to reduce the overall current and
still provide a good 50
at 3.6V and is designed as part of the RFMD PCS 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 A3 010720
Typical Applicat ions
• CDMA/TDMA/DCS1900 PCS Systems
• PHS 1500/ WLAN 2400 Systems
• General Purpose Upconverter
Si BJT
Si Bi-CMOS
GND
LO+
IF+
IF-
1
2
3
4
Funct ional Block Diagram
ü
GaAs HBT
SiGe HBT
3
. The output stage is a class-B,
output match. The unit operates
6
GaAs MESFET
Si CMOS
8
7
6
5
RF OUT
VCC
GND
LO-
• BPSK Modulation
• Micro-Cell PCS Base Stations
• Portable Battery-Powered Equipment
Feat ures
Ordering Infor mat ion
RF Micro Devices, Inc.
7628 Thorndike Road
Greensboro, NC 27409, USA
• Supports Dual Mode Operation
• +8dBm Output Intercept Point
• Single 3.6V Power Supply
• Internally Matched Inputs and Outputs
• Buffered Output
• Double-Balanced Mixer
RF9938
RF9938 PCBA
PCS UPCONVERTER/BPSK MODULATOR
8° MAX
0° MIN
0.196
0.189
xxxxx
xxxxx
xxxxx
0.034
0.016
Package St yle: SOIC-8
PCS 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
RF9938
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-
6-61
6

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rf9938 Summary of contents

Page 1

... CDMA/TDMA/DCS1900 PCS Systems • PHS 1500/ WLAN 2400 Systems • General Purpose Upconverter Product Description The RF9938 is a complete upconverter designed for PCS applications. The IC contains a double-balanced mixer stage and an output buffer amplifier stage. This device may also be used to directly BPSK modulate a carrier. ...

Page 2

... RF9938 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 6 Output ACP Output VSWR Spurious Product Rejection IF Input IF Frequency Differential Input Impedance Output Isolation Isolation ...

Page 3

... The ground side of the bypass capacitors should connect immediately to ground plane OUT RF Output Pin. This pin is internally DC blocked. The output impedance IF IF Rev A3 010720 Applicat ion Schemat RF9938 Interface Schematic RF OUT 100 nF 6-63 6 ...

Page 4

... RF9938 IF IN SMA SMA J2 6-64 Evaluat ion Board Schemat ic (Download Bill of Materials from www.rfmd.com P1-1 VCC 2 GND NC 3 Drawing 9938400 Rev - 1:4 SETUP strip Evaluation Board Layout 1.4” x 1.4” RF OUT 50 strip SMA ...

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