u3741bm ATMEL Corporation, u3741bm Datasheet
u3741bm
Manufacturer Part Number
u3741bm
Description
Uhf Ask Receiver Ic
Manufacturer
ATMEL Corporation
Datasheet
1.U3741BM.pdf
(32 pages)
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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 f
ments made below refer to 433.92-MHz and 315-MHz applications.
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
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)
– Up to 40 dB is Thereby Achievable with Newer SAWs.
0
= 300 MHz to 450 MHz for ASK or FSK data transmission. All the state-
UHF ASK
Receiver IC
U3741BM
Rev. 4662B–RKE–10/04
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