CMX018
UHF FM/FSK Receiver
D/018/3 April 1999
Advance Information
Features
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Applications
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Double Conversion Super-Heterodyne
Receiver and FM/FSK Demodulator
LNA with Switched Gain
High Performance UHF Down-Converter
Stage with Integrated VCO
2.7V Operation
Zero-Power Mode (<10
µ
A)
28-Pin SSOP Package
Temperature Compensated RSSI
High Performance Analogue/Digital
Radio Links (860-965MHz)
General ISM 915MHz Band
Analogue/Digital Cordless Phones
Spread Spectrum Receivers
Analogue FM Receivers
Handheld Data Terminals
So-Ho Wireless Data Links
GAINSEL
TANK
OSCOUT
OSCBA
OSCEM
ENABLE
RSSI
BUFFERED
OSCILLATOR
OUTPUT
BANDGAP
& BIAS
CONTROL
2nd DOWN
CONVERTER
1st DOWN
CONVERTER
LNAIN
50Ω
Ω
Ω
50Ω
VCO
IF LIMITING
AMPLIFIER
FM/FSK
DISCRIMINATOR
LNA
DETOUT
Ω
50Ω
Ω
100Ω
Ω
100Ω
Ω
430Ω
430Ω
Ω
LNADEC
LNAOUT
MIX1IN
MIX1OUT
MIX2IN
MIX2OUT
LIMIN
LIMDEC1 LIMDEC2
LIMOUT
QUADIN
1.1
Brief Description
The CMX018 is a single chip UHF FM/FSK double-conversion super-heterodyne receiver. It combines
a dual gain mode Low Noise Amplifier (LNA), two down-converters (including integrated oscillators),
limiting amplifier, RSSI, FM/FSK demodulator and zero-power mode control.
The CMX018 can be used in conjunction with the CMX017, an integrated FM/FSK modulator and
transmitter, to implement a complete UHF radio link.
CMLMICRO [ CML MICROCIRCUITS ]
