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U3745BM-MFLG3 Datasheet

  • U3745BM-MFLG3

  • UHF ASK RECEIVER IC

  • 29頁(yè)

  • ATMEL   ATMEL

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Features
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Supply Voltage 4.5 V to 5.5 V
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Operating Temperature Range -40擄C to +85擄C
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Minimal External Circuitry Requirements, No RF Components on the PC Board Except
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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
Single-ended RF Input for Easy Matching to
l/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
UHF ASK
Receiver IC
U3745BM
Description
The U3745BM 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 in Manchester or Bi-phase code. The
receiver is well suited to operate with Atmel鈥檚 PLL RF transmitter U2745B. It can be
used in the frequency receiving range of f
0
= 310 MHz to 440 MHz for ASK data trans-
mission. All the statements made below refer to 433.92-MHz and 315-MHz
applications.
The main applications of the U3745BM are in the areas of outside temperature meter-
ing, socket control, garage door opener, consumption metering, light/fan or air-
condition control, jalousies, wireless keyboard and various other consumer market
applications.
Rev. 4663A鈥揜KE鈥?6/03
1

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