The devices are highly integrated system-on-chip (SoC) ultrasonic transducer drivers and a signal conditioners with an advanced DSP core. They feature two driver-based topologies: a transformer-based topology that uses a complimentary low-side driver pair that can drive a transducer using a step-up transformer, or a direct-drive topology that uses external high-side FETs.
Echo-based object detection operates from 5cm to 11m. The architecture is an analogue front-end (AFE), consisting of a low-noise amplifier followed by a programmable time-varying gain stage feeding into an analogue-to-digital converter (ADC). The digitized signal is then processed in the DSP core for both near-field and far-field object detection using time-varying thresholds.
Communication interfaces include a time-command interface (TCI), a one-wire USART asynchronous interface and a CMOS-level USART. The devices also feature on-chip system diagnostics, which provide information such as transducer voltage, frequency and decay time. TI PGA460 devices are supported by the BOOSTXL-PGA460 evaluation module, which works with a TI MSP430 USB LaunchPad evaluation kit to create a USB-to-PC graphical user interface (GUI) communication bridge.