Shiratech Solutions LTE and Sensor Mezzanine for 96Boards – User Manual
10
Analog Devices ADUX1020
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.
The Analog Devices ADUX1020 gesture and proximity sensor is powered by 1.8V. It is
connected to I2C1 bus and GPIO G.
The sensor controls a high power infrared emitter, SFH4056. It receives the IR returning from
an object for gesture and proximity analysis.
Sensor I2C address: 0x64