ATA5283P-6AQJ

The ATA5283P-6AQJ from Microchip Technology is an ultra-low power ASK receiver operating at 125 kHz, primarily designed for the wake-up function in Tire Pressure Monitoring (TPM) applications. This IC amplifies and demodulates carrier signals from an antenna coil to a digital output for a microcontroller.

Key features include a sensitivity of 1 m Vrms, a standby current of just 1 µA, and a wide operating voltage range of 2V to 3.8V. It supports ASK modulation with baud rates up to 4 kbps and operates across a temperature range of -40°C to 125°C, withstanding temperatures up to +175°C. The device requires few external components for a complete TPM system design when combined with an antenna coil, microcontroller, RF transmitter/transceiver, battery, and sensors.

The receiver operates in a standby listen mode with minimal current consumption. Upon detecting a preamble carrier burst, the IC activates, adjusts its gain, and enables wake-up and data outputs. The preamble detection unit monitors incoming signals and activates the wake-up output (N_WAKEUP) and data output (N_DATA) if a proper 125 kHz carrier signal is received. A reset input (RESET) is used to return the IC to standby mode.

Packaged in an 8-TSSOP or 8-MSOP, the ATA5283P-6AQJ is designed for surface mount applications. Its sensitive input stage and automatic gain control (AGC) amplifier enable operation with input signals ranging from 1 m Vrms to 1.1 Vrms.