MAX30009ENA+

Analog Front End (AFE) Overview

The MAX30009 is a complete bioimpedance (BioZ) analog front-end (AFE) designed for wearable applications. It integrates a receive channel with ESD protection, EMI filtering, and two 20-bit sigma-delta ADCs for simultaneous I/Q acquisition. The transmit channel features a programmable sine-wave current generator operating from 16Hz to 500kHz with amplitudes ranging from 16nARMS to 1.28mARMS. The device supports bipolar and tetrapolar configurations, offers ultra-low power consumption of 250μW at 1.8V AVDD, and includes a 256-word FIFO. It operates over a -40ºC to +85ºC temperature range in a 2.03mm x 2.03mm WLP package.

Analog Front End (AFE) Feature Summary

• Simultaneous I and Q measurement capability using high-resolution 20-bit ADCs
• Programmable sine-wave stimulus with frequency range 16Hz to 500kHz and magnitude up to 1.28mARMS
• Ultra-low power operation consuming 250μW at 1.8V AVDD
• Integrated lead-off detection and ultra-low-power lead-on detection

Analog Front End (AFE) Applications

• Wearable fitness, wellness, and medical devices
• Multifrequency body composition analyzers
• Non-invasive hemodynamic monitors
• Automatic external defibrillators

Analog Front End (AFE) Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm RoHS compliance and package details. Confirm availability status directly with Analog Devices or authorized distributors as supply conditions may vary. Ensure the selected variant matches the required thermal and electrical specifications for the target application environment.

Analog Front End (AFE) Selection Notes

Select this component for applications requiring precise bioimpedance spectroscopy or analysis. Consider the 20-bit ADC resolution and low noise characteristics for high-accuracy measurements. Evaluate the flexible input/output MUX capabilities for supporting both bipolar and tetrapolar electrode configurations. Verify that the PLL-based timing subsystem meets the synchronization requirements with other biosensors if applicable.

Analog Front End (AFE) Part Context

The MAX30009 belongs to the BioZ AFE family from Analog Devices/Maxim Integrated. It is specifically engineered for wearable health monitoring solutions. The device complements other biosensors like the MAX86176 PPG/ECG AFE through its synchronized PLL timing subsystem. It addresses the need for long battery life in portable medical and wellness devices while maintaining clinical-grade measurement accuracy.

Analog Front End (AFE) Replacement Considerations

Consult the manufacturer's official documentation for verified direct replacements or pin-compatible alternatives. No substitute part numbers are confirmed in the provided source material.