T5743P3-TGQ Просмотр технического описания (PDF) - Atmel Corporation

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T5743P3-TGQ

UHF ASK/FSK Receiver

Atmel Corporation 

Features

• Two Different IF Receiving Bandwidth Versions Are Available (BIF = 300 kHz or 600 kHz)

• 5 V to 20 V Automotive Compatible Data Interface

• IC Condition Indicator, Sleep or Active Mode

• Low Power Consumption Due to Configurable Self Polling with a Programmable

Timeframe Check

• High Sensitivity, Especially at Low Data Rates

• Data Clock Available for Manchester- and Bi-phase-coded Signals

• Minimal External Circuitry Requirements, no RF Components on the PC Board Except

Matching to the Receiver Antenna

• Sensitivity Reduction Possible Even While Receiving

• Fully Integrated VCO

• SO20 Package

• Supply Voltage 4.5 V to 5.5 V, Operating Temperature Range -40°C to +105°C

• Single-ended RF Input for Easy Adaptation to λ/4 Antenna or Printed Antenna on PCB

• Low-cost Solution Due to High Integration Level

• ESD Protection According to MIL-STD. 883 (4KV HBM)

• High Image Frequency Suppression Due to 1 MHz IF in Conjunction with a SAW Front-

end Filter. Up to 40 dB is Thereby Achievable With State-of-the-art SAWs.

• Communication to Microcontroller Possible Via a Single, Bi-directional Data Line

• Power Management (Polling) Is Also Possible by Means of a Separate Pin Via the

Microcontroller

• Programmable Digital Noise Suppression

UHF ASK/FSK

Receiver

T5743

Preliminary

Description

The T5743 is a multi-chip PLL receiver device supplied in an SO20 package. It has

been especially developed for the demands of RF low-cost data transmission systems

with data rates from 1 kBaud to 10 kBaud in Manchester or Bi-phase code. The

receiver is well suited to operate with Atmel's PLL RF transmitter U2741B. Its main

applications are in the areas of telemetering, security technology and keyless-entry

systems. It can be used in the frequency receiving range of f0 = 300 MHz to 450 MHz

for ASK or FSK data transmission. All the statements made below refer to 433.92 MHz

and 315 MHz applications.

System Block Diagram

Figure 1. System Block Diagram

UHF ASK/FSK

Remote control transmitter

U2741B

XTO

PLL

VCO

Antenna

Power

amp.

T5743

UHF ASK/FSK

Remote control receiver

Demod.

Control

1...5

µC

Antenna

IF Amp

PLL

XTO

LNA

VCO

Rev. 4569A–RKE–12/02

1

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