PGA460 - Texas Instruments

PGA460 Ultrasonic Signal Processor and Transducer Driver

The PGA460 device is a highly-integrated system on-chip ultrasonic transducer driver and signal conditioner with an advanced DSP core. The device has a complimentary low-side driver pair that can drive a transducer either in a transformer based topology using a step-up transformer or in a directdrive topology using external high-side FETs. The device can re.

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 temperatur.