ATA5283：轮胎压力监视(TPM)接收器,有最低的电流消耗和最高大灵敏度,工作电压2.0V-4.2V,灵敏度为1mVrms.pdf

Features • Wake-up Function for a Microcontroller with Preamble Detection • 1 mVrms Sensitivity • 1 µA 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 Interface IC for Application 125 kHz • Tire Pressure Monitoring (TPM) Wake-up 1. Description Function 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 ATA5283 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 1-1. Block Diagram Battery VDD Lx ATA5283 Amplifier with AGC COIL RESET Vref Condi- Preamble N_WAKEUP tio