PGA460 Ultrasonic Signal Processor and Transducer Driver

1 Features

Fully integrated solution for ultrasonic sensing
Complimentary low-side drivers with configurable current limit supporting both transformer based and direct drive topology for transducer excitation
Single transducer for both burst/listen or a transducer pair, one for burst and the other for listen operation
Low-noise receiver with programmable 6-point time-varying gain (32 to 90 dB) with DSP (BPF, demodulation) for echo envelope detection
Two presets of 12-point time-varying threshold for object detection
Timers to measure multiple echo distance and duration
Integrated temperature sensor
Record time for object detection up to 11 m
128 bytes of RAM for echo recording
42 bytes of user EEPROM to store configuration for fast initialization
One-wire high-voltage time-command interface or USART asynchronous interface
CMOS level USART interface
Sensor diagnostics (decay frequency and time, excitation voltage), supply, and transceiver diagnostics