TRF1400

RF TELEMETRY RECEIVERS

VHF/UHF RZ ASK REMOTE CONTROL RECEIVER

SLWS014E – JUNE 1996 – REVISED APRIL 1998

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POST OFFICE BOX 655303

200 MHz to 450 MHz for World-Wide

Remote Control Frequency Compatibility

315 MHz

to 10 kHz

Outputs for Easy Interface to Serial Data

Decoders and Microcontrollers

Eliminates Local Oscillator (No Emissions)

and Reduces Many Government Type

Approvals (Including FCC)

External Components

Amplification and Shaping of Low-Level

Input Signals With Average-Detecting

Autobias Adaptive Threshold Circuitry for

Improved Sensitivity

Surface-Mount Packaging for Extremely

Small Circuit Footprint – Typically Replaces

More Than 40 Components in an Equivalent

Discrete Solution

Filters

Technology for Minimum Power

Consumption

description

The TRF1400 VHF/UHF RZ ASK remote control

receiver is specifically designed for RZ ASK

(return-to-zero amplitude-shift keyed) commu-

nications systems operating in the 200-MHz to

450-MHz band. This device is targeted for use in

automotive and home security systems, garage

door openers, remote utility metering, and other

low-power remote control and telemetry systems.

A complete RZ ASK receiver solution on a chip,

the TRF1400 requires only a minimum of external

components for operation. This significantly

reduces the complexity and footprint of new

designs compared with current discrete receiver

designs. The TRF1400 requires no manual

alignment when using external SAW (surface

acoustic wave) filters. For a lower-cost solution,

the device is also compatible with external LC

components.

The TRF1400 also includes several on-chip features that normally require additional circuitry in a receiver

system design. These include two low-noise front-end amplifiers, an RF amplifier/comparator for detection and

shaping of input signals, and a demodulated RZ ASK baseband TTL-level output that readily interfaces to

self-synchronizing devices. Also included is on-chip Manchester decoding logic that provides a specially

formatted TTL data output, synchronized with a trigger output, for easy interface to any microcontroller using

Manchester-encoded data.

These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam

during storage or handling to prevent electrostatic damage to the MOS gates.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

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LPF

AGND

RFIN3

AVCC

AGND

AVCC

AGND

OFFSET

AGND

OSCR

OSCC

DVCC

RFOUT2

LNA2T

RFIN2

AGND

RFOUT1

LNA1T

RFIN1

AGND

DOUT

TRIG

BBOUT

DGND

DW PACKAGE

(TOP VIEW)

Copyright

© 1998, Texas Instruments Incorporated

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.