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 4.5V 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) Except Pin POUT (2 KV 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)
1.
Description
The ATA3741 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 f
0
= 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.
UHF ASK
Receiver IC
ATA3741
4899B–RKE–10/06
