The ADUX1020BCPZRL7 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 ADUX1020BCPZRL7 is specified over an operating temperature range of −40°C to +85°C.
Feature
- 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
Applications
- Gesture for user interface (UI )control in portable devices
- Industrial/automation monitoring
- Presence detection
- Angle sensing
(Picture: Pinout)
