ADPD105BCPZ

Overview

The ADPD105BCPZ is a multifunction photometric front end from Analog Devices, featuring an integrated analog-to-digital converter (ADC), LED drivers, and timing core. It provides best-in-class ambient light rejection without requiring external optical filters. The device includes three 370 mA LED drivers and utilizes a 20-bit burst accumulator for high-resolution data acquisition. It supports flexible sampling frequencies ranging from 0.122 Hz to 3820 Hz and offers both I²C and SPI interfaces. The component operates on a 1.8 V supply and is designed for low-power applications in wearable health monitors and clinical measurements.

Feature Summary

• Integrated AFE with 14-bit ADC and 20-bit burst accumulator enabling up to 27 bits per data read
• Three 370 mA LED drivers with flexible pulse configurations for optimal ambient light rejection
• Dual interface support: I²C (ADPD105) and SPI (ADPD106/ADPD107)
• Low power operation with standby mode current of 0.3 μA

Applications

• Wearable health and fitness monitors
• Clinical measurements such as SpO₂
• Industrial monitoring systems
• Background light measurements

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to ensure correct package type and interface configuration. Confirm that the procurement source provides valid traceability and authenticity guarantees for Analog Devices components. Check for any regional distribution restrictions or compliance certifications required for your specific market.

Selection Notes

Select the ADPD105BCPZ when an I²C interface is required alongside the full feature set including GPIOs and multiple photodiode inputs. Compare against ADPD106/ADPD107 if SPI communication is preferred or if a smaller WLCSP footprint is necessary. Ensure the application benefits from the integrated LED drivers and high-resolution accumulation capabilities before choosing this part over discrete solutions.

Part Context

The ADPD105 belongs to the ADPD10x family of photometric front ends, which also includes the ADPD106 and ADPD107. While all three share similar internal architectures and performance characteristics, they differ primarily in their digital interface options and available package types. The ADPD105 specifically supports I²C communication and is offered in both LFCSP and WLCSP packages, providing design flexibility for various form factors.

Replacement Considerations

Direct replacements within the same family include the ADPD106 and ADPD107, though these utilize SPI interfaces instead of I²C. Designers must account for interface differences and pinout variations when substituting these parts. No other cross-manufacturer equivalents are officially documented by Analog Devices.