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參數(shù)資料
| 型號(hào)： | RF2721 |
| 廠商： | RF MICRO DEVICES INC |
| 元件分類： | 無(wú)繩電話/電話 |
| 英文描述： | QUADRATURE DEMODULATOR |
| 中文描述： | TELECOM, CELLULAR, BASEBAND CIRCUIT, PDSO14 |
| 封裝： | SOIC-14 |
| 文件頁(yè)數(shù)： | 1/6頁(yè) |
| 文件大?。?/td> | 66K |
| 代理商： | RF2721 |
2-27
7
Q
D
Preliminary
Produc t Desc ription
Ordering Information
Typic al Applic ations
Features
Func tional Block Diagram
RF Micro Devices, Inc.
7628 Thorndike Road
Greensboro, NC 27409, USA
Tel (336) 664 1233
Fax (336) 664 0454
http://www.rfmd.com
Optimum Technology Matching Applied
Si BJT
GaAs HBT
Si Bi-CMOS
SiGe HBT
GaAs MESFET
Si CMOS
1
2
3
4
5
6
7
14
13
12
11
10
9
8
IF1+
GND
OSCB
OSCE
GND
LO2-
LO2+
IF IN-
VCC
PD
GND
I OUT
REF IN
Q OUT
QUAD
DIV.
BY 2
POWER
CONTROL
5 k
5 k
RF2721
QUADR AT UR E DEMODULAT OR
UHF Digital and Analog Receivers
Digital Communication Systems
Spread-Spectrum Communication Systems
Commercial and Consumer Systems
Portable Battery-Powered Equipment
General Purpose Frequency Conversion
The RF2721 is a monolithic integrated quadrature
demodulator intended for use in digital mobile radio
receivers. In this application it is used to recover the in-
phase and quadrature baseband signals from the ampli-
fied and filtered IF. The RF2721 is intended for IF sys-
tems where the IF frequency ranges from 100kHz to
500MHz, and the LO frequency is two times the IF. The
IC contains all of the required components to implement
the demodulation function of the receiver and contains a
digital divider type 90° phase shifter, two double-balanced
mixers, and baseband amplifiers designed to interface
with analog to digital converters. The output DC offset
may be slaved to the reference of the ADCs to maintain
DC accuracy.
5V Power Supply
On-Chip Active Device for Oscillator
ADC Compatible Outputs
Low LO Power Requirement
Digitally Controlled Power Down Mode
100kHz to 500MHz IF Operation
RF2721
RF2721 PCBA
Quadrature Demodulator
Fully Assembled Evaluation Board
2
Rev A2 010509
0.156
0.148
0.059
0.057
0.252
0.236
0.010
0.004
.018
.014
8° MAX
0° MIN
0.0500
0.0164
0.010
0.007
0.347
0.339
0.050
Package Style: S OIC-14
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