ATA3742 Datasheet, PDF (1/34 Pages) ATMEL Corporation – UHF ASK/FSK Receiver

Features
• IC Distinguishes the Signal Strength of Several Transmitters via RSSI (Received Signal
Strength Indicator) Output
• 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 4.5V to 5.5V
• 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 (4 KV HBM)
• High Image Frequency Suppression Due to 1 MHz IF in Conjunction With a SAW
Front-end Filter (Up to 40 dB Achievable With Newer 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
UHF ASK/FSK
Receiver
ATA3742
1. Description
The ATA3742 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 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 IC U2741B. Its main applications in the area of wireless control are
telemetering, security technology, tire-pressure monitoring and keyless-entry sys-
tems. 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 in this datasheet refer both to
433.92 MHz and 315 MHz applications.
Rev. 4900A–RKE–11/05