Ultra-low power 85microwatt, single-channel integrated biopotential AFE

July 22, 2016 // By Graham Prophet
Maxim Integrated has posted preliminary information on its MAX30003, which is a complete, biopotential, analogue front-end solution for wearable, clinical and fitness applications, with ultra-low power for long battery life. The MAX30003 is a single biopotential channel providing ECG waveforms and heart rate detection.

The biopotential channel has ESD protection, EMI filtering, internal lead biasing, DC leads-off detection, ultra-low power leads-on detection during standby mode, and calibration voltages for built-in self-test. Soft power-up sequencing ensures no large transients are injected into the electrodes. The biopotential channel also has high input impedance, low noise, high CMRR, programmable gain, various low-pass and high-pass filter options, and a high-resolution analogue-to-digital converter. The biopotential channel is DC coupled, can handle large electrode voltage offsets, and has a fast recovery mode to quickly recover from overdrive conditions, such as defibrillation and electrosurgery. It comes in a 28-pin TQFN and 30-bump wafer-level package (WLP), operating over the 0°C to +70°C commercial temperature range.

Use the device, Maxim suggests, in bio-authentication and ECG-on-demand applications; chest band heart rate monitors for fitness applications; single lead event monitors for arrhythmia detection; and single lead wireless patches for at-home/in-hospital monitoring.

Maxim Integrated; www.maximintegrated.com/en/products/analog/data-converters/analog-front-end-ics/MAX30003

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