ADPD142RG-BCEZ-RL

Overview

The ADPD142RG-BCEZ-RL is a fully integrated photometric system module measuring 2.8 mm by 5 mm, designed for optical heart rate monitoring and reflective SpO2 measurement. It incorporates red and green LEDs, a photodiode, and a true dual-channel 250 mA LED driver with separate settings per channel. The analog front end features a 14-bit ADC with a 20-bit burst accumulator, enabling up to 27 bits of resolution per data read via an on-board sample-to-sample accumulator. The device provides best-in-class ambient light rejection and communicates through a 1.8 V I2C interface.

Feature Summary

• Integrated optical components including red and green LEDs and a photodiode within a compact module.
• True dual-channel 250 mA LED driver allowing independent configuration for each channel.
• Advanced signal processing with a 14-bit ADC, 20-bit burst accumulator, and up to 27-bit effective resolution.
• Robust ambient light rejection capabilities for both DC and AC interference.

Applications

• Optical heart rate monitoring
• Reflective SpO2 measurement

Procurement Notes

Verify the specific suffix BCEZ against the manufacturer's official documentation to confirm package type and reel specifications. Ensure compatibility with the 1.8 V I2C interface requirements for your system design. Confirm that the red and green LED configuration matches your application needs, as other variants exist. Check for any recent product change notifications regarding assembly or material composition updates.

Selection Notes

Select this component when a complete, miniaturized photometric solution is required for wearable health devices. The integrated nature reduces board space and simplifies design compared to discrete LED and sensor combinations. Consider the 27-bit effective resolution for high-sensitivity applications requiring accurate signal extraction in noisy environments. Verify power supply constraints align with the module's operational requirements.

Part Context

The ADPD142RG is part of Analog Devices' family of fully integrated photometric systems, specifically designed for biomedical sensing. It complements the ADPD142RI variant, which uses infrared LEDs instead of green. These modules are engineered to simplify the development of non-invasive physiological monitoring devices by combining optical stimulation, detection, and signal conditioning into a single small form factor.

Replacement Considerations

The ADPD142RI serves as a functional alternative if infrared illumination is preferred over green LEDs for specific tissue penetration depths. Both share the same footprint and interface but differ in LED spectrum. No direct pin-for-pin replacements from other manufacturers are officially documented; system redesign may be necessary for cross-brand substitution.