PGA460/PGA460-Q1 Ultrasonic Processor & Driver

Texas Instruments PGA460/PGA460-Q1 Ultrasonic Processor & Driver is a highly integrated system-on-chip ultrasonic transducer driver and a 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 direct-drive topology using external high-side FETs. The PGA460/PGA460-Q1 can receive and condition the reflected echo signal for reliable object detection. This feature is accomplished using an analogue front-end (AFE) consisting of a low-noise amplifier followed by a programmable time-varying gain stage feeding into an ADC. The digitised signal is then processed in the DSP core for both near-field and far-field object detection using time-varying thresholds.