ADPD144RI-ACEZ-RL7

Lighting Controller IC 12Pin LGA T/R

Product Details

The ADPD144RI is a complete photometric system designed to measure optical signals from ambient light and from synchronous reflected light emitting diode LED pulses. Synchronous measurement offers best-in-class rejection of ambient light interference, both dc and ac. The module integrates a highly efficient photometric front end, two LEDs, and a 4-channel photodiode PD. All of these components are housed in a custom package that prevents light from going directly from the LED to the photodiode without first entering the subject.

The front end of the application specific integrated circuit ASIC consists of a control block, a 14-bit analog-to-digital converter ADC with a 20-bit burst accumulator, and two flexible, independently configurable LED drivers. The control circuitry includes flexible LED signaling and synchronous detection. The analog front end AFE processes data on two separate data paths in parallel, with the option of separate AFE settings. The data output and functional configuration occur over a 1.8 V I2C interface.

Applications

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Optical heart rate monitoring

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Reflective SpO2 measurement

### Features and Benefits

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2.8 mm × 5.0 mm module with integrated optical components

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One 660 nm LED1, one 880 nm LED2, one 4-channel photodiode

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True 2-channel, 370 mA LED driver

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Specifically designed for ultralow direct optical reflections

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Separate LED and AFE settings for each channel

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Dual data registers for each LED return signal

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14-bit ADC

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20-bit burst accumulator enabling 20 bits per sample period

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On-board sample to sample accumulator enabling up to 27 bits per data read

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Custom optical package made to work under a glass window