The PGA460-Q1 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 direct-drive topology using external high-side FETs. The device can receive and condition
the reflected echo signal for reliable object detection. This feature is accomplished using an
analog front-end (AFE) consisting of a low-noise amplifier followed by a programmable time-varying
gain stage feeding into an ADC. The digitized signal is processed in the DSP core for both
near-field and far-field object detection using time-varying thresholds.
The main communication with an external controller is achieved by either a time-command
interface (TCI) or a one-wire USART asynchronous interface on the IO pin, or a CMOS-level USART
interface on the RXD and TXD pins. The PGA460-Q1 can be put in ultra-low quiescent current
low-power mode to reduce power consumption when not in use and can be woken up by commands on the
The PGA460-Q1 also includes on-chip system diagnostics which monitor transducer voltage
during burst, frequency and decay time of transducer to provide information about the integrity of
the excitation as well as supply-side and transceiver-side diagnostics for overvoltage,
undervoltage, overcurrent and short-circuit scenarios.
For all available packages, see the orderable addendum at the
end of the data sheet.
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