ADPD144RI-ACEZ-RL7

Overview

The ADPD144RI is a highly integrated optical sensor module designed for photoplethysmography (PPG) applications. It features a 2.8 mm × 5.0 mm package containing a 660 nm red LED, an 880 nm infrared LED, and a four-segment deep-diffusion photodiode with a total active area of 1.2 mm². The module includes a fully integrated analog front end (AFE), a 14-bit ADC, programmable LED drivers capable of 8.5 mA to 370 mA peak current, and a digital control block. It operates on a 1.8 V supply voltage and communicates via an I²C interface. The device supports burst accumulation up to 20 bits per sample period and sample-to-sample accumulation up to 27 bits.

Feature Summary

• Synchronous detection architecture that rejects DC and AC ambient light interference while minimizing power consumption.
• Custom optical package providing isolation between integrated emitters and detection photodiodes to improve signal-to-noise ratio.
• Two independent time slots allowing separate configuration of AFE settings, gain, filters, and LED timing for each wavelength.

Applications

• Optical heart rate monitoring
• Reflective SpO2 measurement

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to ensure correct packaging and tape specifications. Confirm that the component meets all relevant RoHS compliance standards required for your manufacturing process before finalizing procurement orders.

Selection Notes

Select this module when space constraints require a compact solution integrating both emitters and the photometric front end. Ensure the application environment stays within the specified operating temperature range of −40°C to +85°C and that the host system provides a stable 1.8 V logic supply for the I²C interface.

Part Context

This component belongs to the Analog Devices ADPD family of optical sensor modules. It is specifically engineered for reflective PPG measurements where low power and high sensitivity are critical. The integration of the ASIC with the optical components simplifies the design process by reducing the number of external discrete components required.

Replacement Considerations

Consult the official datasheet for alternative part numbers within the same product family that may offer different pin configurations or performance characteristics suitable for specific design modifications.