• Fully integrated solution for ultrasonic sensing
• AEC-Q100 qualified with the following results:
  • Device temperature grade 2: –40°C to +105°C ambient operating temperature
  • Device HBM ESD classification level 2
  • Device CDM ESD classification level C4B
• 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

• Ultrasonic radar
• Automotive park assist
• Lane-departure and collision warning
• Object distance and position sensing
• Presence and proximity detection
• Drone and robotics landing assist and obstacle detection
• Automotive and industrial door-opening sensing
• Automotive motion sensor for intrusion detection alarm
• Occupancy and motion sensors

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 communication interfaces.

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.

Typical Application Diagram (Transformer Drive)