RF9958 Datasheet, PDF (1/12 Pages) RF Micro Devices – CDMA/FM TRANSMIT MODULATOR, IF AGC, AND UPCONVERTER

5
Typical Applications
• CDMA/FM Cellular Systems
• CDMA PCS Systems
• Wireless Local Loop Systems
RF9958
CDMA/FM TRANSMIT MODULATOR, IF AGC,
AND UPCONVERTER
• Spread Spectrum Cordless Phones
• High Speed Data Modems
• General Purpose Digital Transmitters
Product Description
6.20
5.79
3.99
0.25
The RF9958 is an integrated complete Quadrature Modu-
PIN 1
3.81
0.10
lator, IF AGC amplifier, and Upconverter designed for the
INDENT
0.36
0.23
TYP
5
transmit section of dual-mode CDMA/FM cellular and
PCS applications. It is designed to modulate baseband I
and Q signals, amplify the resulting IF signals while pro-
10.01
9.80
0.635
TYP
viding 95dB of gain control range, and perform the final
upconversion to UHF. Noise Figure, IP₃, and other specifi-
cations are designed to be compatible with the IS-98
1.73
7°
1.47
Interim Standard for CDMA cellular communications. This
circuit is designed as part of RFMD’s newest CDMA Chip
Set, which also includes the RF9957 CDMA/FM Receive
IF AGC and Demodulator. The IC is manufactured on an
advanced 15GHz F_T Silicon Bipolar process, and is sup-
plied in a 28-lead plastic SSOP package.
0.25
0.10
8°
1.27
0°
0.38
NOTES:
1. Shaded lead is Pin1.
2. Lead frame material: Copper 194
3. Mold flash shall not exceed 0.006 (0.15 mm) per end.
4. Interlead flash shall not exceed 0.010 (0.25 mm) per side.
5. All dimensions are excluding mold flash and protrusions.
Optimum Technology Matching® Applied
ü^{Si BJT}
GaAs HBT
GaAs MESFET
Si Bi-CMOS
SiGe HBT
Si CMOS
1
27
Q SIG 2
Q REF 3
LO1- 8
LO1+ 9
I REF 5
I SIG 4
Quad.
÷2
Gain
Control
Σ
Band Gap
Reference
25 MOD OUT+
24 MOD OUT-
21 MIX IN-
22 MIX IN+
10 13 15 17 19 20
Package Style: QSOP-28
Features
• Supports Dual Mode Operation
• Digitally Controlled Power Down Modes
• 2.7V to 3.3V Operation
• Digital First LO Quadrature Divider
• Double-Balanced UHF Upconvert Mixer
• IF AGC Amp with 95 dB Gain Control
Ordering Information
RF9958
RF9958 PCBA
CDMA/FM Transmit Modulator, IF AGC, and Upcon-
verter
Fully Assembled Evaluation Board
Functional Block Diagram
RF Micro Devices, Inc.
7628 Thorndike Road
Greensboro, NC 27409, USA
Tel [phone]
Fax [phone]
http://www.rfmd.com
Rev B11 010720
5-93