ATA5283| Datasheet

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Features

Wake-up Function for a Microcontroller with Preamble Detection 1 mVrms Sensitivity 1 uA Standby Current Power Supply: 2V to 3.8V Baud Rate: up to 4 kbps (ASK Modulation) Operation Temperature: up to 125 C Withstands +175 C Few External Components

Application
Tire Pressure Monitoring (TPM)

1. 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 amplifies 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/transceiver, a battery, temperature- and pressure sensor, it is possible to design a complete Tire Pressure Monitoring system (TPM). Figure 1-1. Block Diagram
Battery

Interface IC for 125 kHz Wake-up Function ATA5283

VDD Lx COIL Amplifier with AGC

ATA5283

RESET

Vref

Conditioner

Preamble check

N_WAKEUP

N_DATA TST1 TST2 GND

4598H AUTO 03/07

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ATA5283 DATASHEET