ADUX1020 Photometric Sensor for Gesture and Proximity

The ADUX1020 is a highly efficient photometric sensor with an integrated 14-bit analog-to-digital converter (ADC) and a 20-bit burst accumulator that works in concert with a flexible light emitting diode (LED) driver. It is designed to modulate a LED and measure the corresponding optical return signal. The digital engine includes circuitry and control for data aggregation and proximity detection.

The data output and device configuration use a 1.8 V I2C interface. The control circuitry includes flexible LED pulse width and period generation combined with synchronous detection. This circuitry is complemented by a low noise, low power, and wide dynamic range configurable analog front end (AFE), clock generation, LED driver, and digital logic for position and smart sample mode (event driven x, y coordinates, relative z data). This complete AFE features ambient light rejection, avoiding corruption due to external interference.

One inexpensive standard surface mount, broad angle or narrow angle IR LED (depending upon application) is required. This LED mounts externally to the ADUX1020.

Packaged in a small clear mold 2 mm × 3 mm, 8-lead LFCSP, the ADUX1020 is specified over an operating temperature range of −40°C to +85°C.

Applications
  • Gesture for user interface (UI )control in portable devices
  • Industrial/automation monitoring
  • Presence detection
  • Angle sensing
Features and Benefits
  • Multifunction photometric sensor and signal conditioning
  • Fully integrated AFE, ADC, LED driver, and timing core
  • Usable for multiple optical measurement applications, including gesture control and proximity sensing
  • Enables an ambient light rejection capability using both optical and analog filtering
  • On-chip programmable flexible current sink for external LED
  • High sensitivity and signal-to-noise ratio (SNR)
  • High resolution position measurement
  • Gesture recognition with 0.5 cm to 15 cm range
  • Proximity sensing to 20 cm
  • 400 kHz I2C interface
  • Gesture/proximity works under infrared (IR) transparent glass or other materials
  • Simple integration with optics; no need for precise alignment and no lens is required
  • Low power operation
  • 1.8 V analog/digital core
  • 8-lead, 2 mm × 3 mm, 0.65 mm height LFCSP
  • Optical
    Data Sheets
    Documentnote
    ADUX1020: Photometric Sensor for Gesture and Proximity Data Sheet (Rev. A)PDF 500.53 K
    Application Notes
    Documentnote
    AN-1419: Using the ADUX1020 for Gesture Recognition (Rev. 0)PDF 184.07 K
    User Guides
    Documentnote
    UG-1022: Evaluating the ADUX1020 Photometric Sensor for Gesture and Proximity (Rev. 0)PDF 440.83 K
    Order Information
    Part NumberPackagePacking QtyTemp RangePrice 100-499Price 1000+RoHS
    ADUX1020BCPZRL7 Production8 ld LFCSP (2x3mm 1.59x1.89mm EP)REEL 300003.49Y
    Evaluation Boards
    Part NumberDescriptionPriceRoHS
    ADUX1020-EVAL-SDPEvaluation Board119Y
    ADUX1020-EVALZ-LEDDaughter Board (Optional)29Y
    ADUX1020: Photometric Sensor for Gesture and Proximity Data Sheet (Rev. A) adux1020
    AN-1419: Using the ADUX1020 for Gesture Recognition (Rev. 0) adux1020
    UG-1022: Evaluating the ADUX1020 Photometric Sensor for Gesture and Proximity (Rev. 0) adux1020