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RF2679 Datasheet

  • RF2679

  • Analog IC

  • 207.54KB

  • 10頁

  • ETC

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Preliminary
7
Typical Applications
鈥?W-CDMA Systems
RF2679
W-CDMA RECEIVE AGC AND DEMODULATOR
Product Description
The RF2679 is an integrated complete IF AGC amplifier
and Quadrature Demodulator designed for the receive
section of W-CDMA applications. It is designed to amplify
received IF signals, while providing 60dB of gain control
range, a total of 90dB gain, and demodulate to baseband
I and Q signals. This circuit is designed as part of
RFMD鈥檚 single-mode W-CDMA Chipset, which also
includes the RF2678 W-CDMA Transmit Modulator and IF
AGC. The IC is manufactured on an advanced 25GHz F
T
Silicon Bi-CMOS process, and is packaged in a
4mmx4mm LPCC-24.
4.00
+0.20
0.90
+0.10
4.00
+0.20
2.80
+0.05 sq
7
QUADRATURE
DEMODULATORS
Tel (336) 664 1233
Fax (336) 664 0454
http://www.rfmd.com
2.50
sq
0.40
+0.05
0.500
+0.025
Optimum Technology Matching廬 Applied
Package Style: LPCC-24
!
Si Bi-CMOS
BG OUT
24
GC 1
DEC 2
CDMA IN+ 3
CDMA IN- 4
VCC1 5
VCC2 6
7
VCC3
Si BJT
GaAs HBT
SiGe HBT
ENABLE
CALEN
GaAs MESFET
Si CMOS
QDCFB
Features
鈥?Digitally Controlled Power Down Mode
鈥?2.7V to 3.3V Operation
鈥?Digital LO Quadrature Divide-by-4
鈥?IF AGC Amp with 70dB Gain Control
鈥?85dB Maximum Voltage Gain
FL+
22
23
21
FL-
20
19
18 IDCFB
Band Gap
Reference
Gain
Control
BB Filter
17 I OUT+
16 I OUT-
BB Filter
15 GND2
14 Q OUT+
13 Q OUT-
10
GND1
11
VCC4
12
FCLK
Quad.
梅4
8
LO+
9
LO-
Ordering Information
RF2679
RF2679 PCBA
W-CDMA Receive AGC and Demodulator
Fully Assembled Evaluation Board
Functional Block Diagram
RF Micro Devices, Inc.
7625 Thorndike Road
Greensboro, NC 27409, USA
Rev A0 000825
7-39

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