U3741BM Ver la hoja de datos (PDF) - Atmel Corporation

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Fabricante

U3741BM

UHF ASK Receiver IC

Atmel Corporation 

Features

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

Matching to the Receiver Antenna

• High Sensitivity, Especially at Low Data Rates

• Sensitivity Reduction Possible Even While Receiving

• Fully Integrated VCO

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

Frame Check

• 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) Except Pin POUT (2KV 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 Newer SAWs.

• Programmable Output Port for Sensitivity Selection or for Controlling External

Periphery

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

• Power Management (Polling) is also Possible by Means of a Separate Pin via the

Microcontroller

• 2 Different IF Bandwidth Versions are Available (300 kHz and 600 kHz)

UHF ASK

Receiver IC

U3741BM

Description

The U3741BM is a multi-chip PLL receiver device supplied in an SO20 package. It has

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

with low data rates from 1 kBaud to 10 kBaud (1 kBaud to 3.2 kBaud for FSK) 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 state-

ments made below refer to 433.92-MHz and 315-MHz applications.

Rev. 4662B–RKE–10/04

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