SPRF2738A
LOW POWER FM/FSK IF IC
1. GENERAL DESCRIPTION
SPRF2738A is a highly integrated IF (Intermediate Frequency) IC
which is popularly used in FM / FSK (Frequency Modulation /
Frequency-Shift Keying) or OOK (On-Off Keying) communication
systems.
It also contains a low noise amplifier, mixer, oscillator, IF limiting
amplifier with RSSI (Received Signal Strength Indicator, metal
optioned), quadrature demodulator, amplifier, and digital data
slicer. The SPRF2738A is designed for single channel receiver at
10MHz - 50MHz band. It is also applicable for dual conversions
communication system.
2. FEATURES
Operation voltage: 2.4V - 5.5V
Low current consumption: 2.5mA @ VDD = 3.0V.
Operating frequency up to 50MHz
Power down function
Single chip FM/FSK or OOK receiver.
RSSI function (metal option)
-107dBm sensitivity (SNR = 12dB)
Full ESD protection
3. APPLICATION FIELD
Dual conversion IF
Voice/data communication.
Radio control toy
Wireless keyboard, mouse receiver
4. BLOCK DIAGRAM
MXO
LMI
QUAD
LNAI
LNA
QDEM
CF
VDD
1.8K
Ω
DO
CP
OPP
OPO
VSS
LMO
60k
OSC
OSCO
OSCI
DEMO
RSSI
RSSI
PD
CN
OPN
60k
100k
1.9V
DOB
1.8K
Ω
© Sunplus Technology Co., Ltd.
Proprietary & Confidential
3
APR. 30, 2003
Version: 1.2
Sunplus
Confidential
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