CMX017 Datasheet, PDF (1/14 Pages) List of Unclassifed Manufacturers – UHF FM/FSK Transmitter

CMX017
UHF FM/FSK
Transmitter
D/017/3 April 1999
Advance Information
Features
Applications
• Direct FM/FSK UHF Modulator
• General Radio Link 860-965 MHz
• Adjustable Modulator Output Power
• General 915MHz ISM Band (USA)
• Integrated Power Amplifier with Output
• Spread Spectrum Wireless Systems
Power up to +20dBm (100mW)
• Fixed Frequency Transmissions
• Low Power 2.7V Operation
• Analogue/Digital Cordless Phones
• Powersave and Zero-Power (<10µA) Modes • Handheld Data Terminals
• 28-Pin SSOP Package
• So-Ho Wireless Data Links
GAIN
MODOUT
PAIN
IPAOUT
MODIN
FM/FSK
MODULATOR
POWER
AMPLIFIER
DRIVER
TANK
BUFFERED
OSCILLATOR
OUTPUT
OSCOUT
POWER
AMPLIFIER
BANDGAP & BIAS
CONTROL
ENLMOD ENLPA
PAOUT
1.1 Brief Description
The CMX017 is a single chip UHF FM/FSK transmitter that combines both the RF VCO Modulator and
RF Power Amplifier. It is suitable for both audio FM and digital FSK transmissions.
A buffered oscillator output provides the RF signal drive to an external synthesizer or fixed frequency
phase-locked loop for channel frequency selection. Modulator output power is adjustable over a 20dB
range and the integrated power amplifier delivers up to +20dBm. The device also includes a powersave
mode: “Transmit Standby” and a zero-power mode: “Sleep”. These allow independent power down
control of both the modulator and power amplifier, thereby maximising battery life. The device can be
used in conjunction with the CMX018, a double-conversion super-heterodyne receiver, to implement a
complete UHF radio link.
© 1999 Consumer Microcircuits Limited