MTX-405
ASK/FSK TRANSMITTER MODULE
The MTX-405 is a 290MHz-980MHz RF transmitter IC
designed for unlicensed ISM band operations. Its designed
to work in the North American 315MHz and 915MHz bands
as well as the European 433MHz and 868MHz bands.
The transmitter consists of an FSK/ASK modulator, PLL
frequency synthesizer and a power amplifier. The frequency
synthesizer consists of a voltage controlled oscillator (VCO),
a crystal oscillator, dual modulus prescaler, programmable
Typical Applications
Meter reading
Automotive
Smart home
Remote control systems
Residential automation
Wireless security system
General wire elimination
Key Features
FSK/ASK transmitter
Low cost
Commonly employed RKE frequencies
Wide operating temperature range
Easily integrated
Compact surface-mount packages/Small size
Frequency Programmable
ASK modulation depth programmable
Power down pin
No production tuning
High efficiency power amplifier
Programmable output power
Base band package engine
TX buffer
No external tuning circuitry
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frequency dividers and a phase-detector. The output power of the power amplifier can be programmed
to eight levels. A lock detect circuit detects when the PLL is in lock.
In FSK mode, the user can select between three different modulation types allowing a data rate up to
200kbps. When selecting FSK modulation applied with dividers, the MTX-405 is switching between to
sets of register values. The second modulation type is closed loop VCO modulation using the internal
modulator that applies the modulated data to the VCO. The third FSK modulation type is Open loop
VCO modulation.
In ASK modulation, the user can select between two modulation types, with or without spreading. In
both modes the modulation depth is programmable.
Contact Information
Radios, Inc.
1408 Center Avenue
Oostburg, WI 53070
Phone: 920-564-6622
Fax: 920-564-6630
Email: sales@radiosinc.com
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