Ultra-Low-Power, Single-Channel Integrated Bioimpedance (BioZ) AFE

The MAX30002 is a complete bioimpedance (BioZ), analog front-end (AFE) solution for wearable applications. It offers high performance for clinical and fitness applications, with ultra-low-power for long battery life. The MAX30002 is a single bioimpedance channel capable of measuring respiration.

The bioimpedance channel has ESD protection, EMI filtering, internal lead biasing, DC leads-off detection, ultra-low-power leads-on detection during standby mode, and a programmable resistive load for built-in self-test. Soft power-up sequencing ensures no large transients are injected into the electrodes. The channel also has high input impedance, low noise, high CMRR, programmable gain, various low-pass and high-pass filter options, and a high resolution analog-to-digital converter. The bioimpedance channel includes integrated programmable current drive, works with common electrodes, and has the flexibility for 2 or 4 electrode measurements. It also has AC lead off detection.

The MAX30002 is available in a 28-pin TQFN and 30-bump wafer-level package (WLP), operating over the 0°C to +70°C commercial temperature range.

Applications

* Impedance Based Heart Rate Detection * Respiration and Hydration Monitors * Single-Lead Wireless Patches for In-Patient/Out-Patient Monitoring

* BioZ AFE with High Resolution Data Converter

* 17 Bits ENOB with 1.1µVP-P Noise for BioZ

* High AC Dynamic Range of 90mVP-P Will Help Prevent Saturation in the Presence of Motion/Direct Electrode Hits

* Longer Battery Life Compared to Competing Solutions

* 158µW at 1.1V Supply Voltage

* Leads-On Interrupt Feature Allows to Keep µC in Deep Sleep Mode Until Valid Lead Condition is Detected

* Lead-On Detect Current: 0.63µA (typ)

* High Accuracy Allows for More Physiological Data Extractions

* 8-Word FIFO Allows the MCU to Stay Powered Down for 256ms with Full Data Acquisition

* High-Speed SPI Interface

* Shutdown Current of 0.58µA (typ)