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ATA5283 Datasheet

  • ATA5283

  • Interface IC for 125 kHz Wake-up Function

  • 14頁

  • ATMEL   ATMEL

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Features
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Wake-up Function for a Microcontroller with Preamble Detection
1 mV
rms
Sensitivity
1 碌A(chǔ) Standby Current
Power Supply: 2 V to 3.8 V
Baud Rate: up to 4 kbps (ASK Modulation)
Operation Temperature: up to 125擄C
Withstands +175擄C
Few External Components
Application
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Tire Pressure Monitoring (TPM)
Description
The ATA5283 is a 125 kHz ultra-low power receiver used for the wake-up function of
Tire Pressure Monitoring (TPM) application. The sensitive input stage of the IC ampli-
fies and demodulates the carrier signal from the antenna coil to a digital output signal
for a microcontroller. During the standby mode the preamble detection unit monitors
the incoming signal and activates the wake-up output and the data output, if the IC
receives a proper 125 kHz carrier signal.
By combining the IC with an antenna coil, a microcontroller, an RF transmitter/trans-
ceiver, a battery, temperature- and pressure sensor, it is possible to design a
complete Tire Pressure Monitoring system (TPM).
Figure 1.
Block Diagram
Interface IC for
125 kHz
Wake-up
Function
ATA5283
Preliminary
Battery
VDD
ATA5283
Lx
COIL
Amplifier
with AGC
RESET
Vref
Condi-
tioner
Preamble
check
N_WAKEUP
N_DATA
TST1
TST2
GND
Rev. 4598D鈥揂UTO鈥?3/04

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