MAXM86146CFU+

Sensor And Detector Interfaces Overview

The MAXM86146 is a highly integrated optical data acquisition system combining an analog front end, an Arm Cortex-M4 microcontroller, and two photodiodes. It operates from a single 1.8V supply with a flexible LED driver voltage ranging from 3.1V to 5.5V. The device features two low-noise readout channels with independent 19-bit ADCs and ambient light cancellation circuits. It supports I2C communication at speeds up to 400kHz and includes 256KB of Flash memory and 96KB of SRAM. The module measures 4.5mm x 4.1mm x 0.88mm in a 38-pin OLGA package and functions within a temperature range of 0°C to +70°C.

Sensor And Detector Interfaces Feature Summary

• Integrates a dual-channel optical analog front end with industry-leading ambient light rejection capabilities.
• Includes an ultra-low-power Arm Cortex-M4 microcontroller for on-chip processing and algorithm execution.
• Features embedded algorithms that adjust optical settings based on activity classification to maximize signal-to-noise ratio while minimizing power consumption.
• Supports simultaneous wrist-based pulse heart rate and blood oxygen saturation measurements.

Sensor And Detector Interfaces Applications

• Wearable devices for fitness and wellness
• Optimized for wrist, finger, and other body locations
• Detection of pulse heart rate (HR)
• Detection of arterial oxygen saturation (SpO2)

Sensor And Detector Interfaces Procurement Notes

Verify the component authenticity by checking the marking code against official manufacturer documentation. Ensure the ordering suffix matches the required RoHS compliance status. Confirm the package type is the specified 38-pin OLGA variant. Validate the revision number on the datasheet to ensure compatibility with current firmware requirements. Cross-reference the part number with authorized distributors to confirm availability.

Sensor And Detector Interfaces Selection Notes

Select this module when space-constrained wearable designs require integrated biometric sensing. It is suitable for applications needing simultaneous heart rate and SpO2 monitoring without external sensor hubs. Consider the need for external LEDs and an accelerometer to complete the system functionality. Evaluate the requirement for deep-sleep modes to extend battery life in portable devices. Ensure the host system supports the necessary I2C interface for configuration and data retrieval.

Sensor And Detector Interfaces Part Context

This component belongs to the Maxim Integrated biosensing portfolio, designed specifically for compact health monitoring solutions. It integrates the MAX86141 AFE and MAX32664C MCU into a single module. The design targets the growing market for non-invasive vital sign tracking in consumer electronics. It represents a shift towards highly integrated sensor hubs that reduce board space and simplify development cycles.

Sensor And Detector Interfaces Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Designers should consult the manufacturer's product selection guide for compatible alternatives or updated versions within the same family. Verify pinout and electrical specifications before considering any cross-references.

Sensor And Detector Interfaces FAQ

How does the MAXM86146 handle motion artifacts during measurement?

The device uses integrated accelerometer data to compensate for periodic motion artifacts. It supports multiple accelerometer options to allow robust detection and rejection of motion interference.

What is the dynamic range of the optical readout channels?

The dynamic range exceeds 90dB in a white card loop-back test. It is extendable to greater than 104dB for SpO2 and greater than 110dB for HRM using multiple sample modes and on-chip averaging.

Can the MAXM86146 operate independently without a host processor?

Yes, it can operate independently as a sensor hub. It processes raw and calculated data internally and provides access to results via the I2C interface, reducing host interaction through its FIFO buffer.