ADPD142RG

Obsolete

Fully Integrated Photometric System with Ambient Light Rejection

Data Sheet (Rev. SpB) Product Selection Table

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Overview

2.8 mm × 5 mm module with integrated optical components
- Red and green LEDs
- Photodiode
True dual channel 250 mA LED driver
Separate LED and AFE settings for each channel
Dual data registers for each LED return signal
14-bit ADC
20-bit burst accumulator enabling 20 bits per sample period
On-board sample to sample accumulator enabling up to 27 bits per data read

The ADPD142RG/ADPD142RI are complete photometric systems designed to stimulate LEDs and measure the corresponding optical return signals. These systems feature best-in-class rejection of ambient light interference, both dc and ac. Each module contains a highly efficient photometric front end, two LEDs, and a photodiode. The front end consists of a control block, a 14-bit analog-to-digital converter (ADC) with 20-bit burst accumulator and two flexible, independently configurable LED drivers. The analog front end (AFE) handles return data from each LED on separate data paths, and with the option of separate AFE settings. The data output and functional con-figuration occur over a 1.8 V I²C interface. The control circuitry includes flexible LED signaling and synchronous detection.

Applications