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Texas Instruments PGA460/PGA460-Q1超聲波處理器和驅動器

Texas Instruments PGA460/PGA460-Q1超聲波處理器和驅動器是一種高度整合的晶圓上系統超聲波傳感器驅動器，以及一種具有進階DSP內核的訊號調節器。該裝置擁有一個互補低側驅動器對，可使用升壓器以基於變壓器的拓撲，或使用外部高側FET以直接驅動拓撲方式驅動傳感器。PGA460/PGA460-Q1可接收和調節反射的迴聲訊號用於可靠的物體偵測。該功能透過類比前端(AFE)實現，包括一個低雜訊放大器，以及一個饋送至ADC的可編程變時增益階段。數位化訊號隨後在DSP內核中進行處理，用於透過變時閾值進行近場和遠場物體偵測。

The Texas Instruments PGA460-Q1 variant of this device is AEC-Q100 qualified for use in automotive applications 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

特點

  • Fully integrated solution for ultrasonic sensing
  • Complimentary low-side drivers with configurable current limit supporting both transformers 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 90dB) with DSP (BPF, demodulation) for echo envelope detection
  • Two presets of the 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 11m
  • 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

應用

  • Ultrasonic radar
  • Object distance and position sensing
  • Presence and proximity detection
  • Drone and robotics landing assist and obstacle detection
  • Occupancy and motion sensors

Additional Resources

Functional Block Diagram

結構圖 - Texas Instruments PGA460/PGA460-Q1超聲波處理器和驅動器

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發佈日期: 2017-06-02 | 更新日期: 2023-10-25