Analog Devices / Maxim Integrated MAX30002 Bioimpedance Analog Front-End
Analog Devices MAX30002 Bioimpedance (BioZ) Analog Front-End (AFE) offers high performance for clinical and fitness applications, with ultra-low power for extended 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 an integrated programmable current drive, works with common electrodes, and has the flexibility for 2 or 4 electrode measurements. The Analog Devices MAX30002 also has AC lead-off detection.
Features
- BioZ AFE with high-resolution data converter
- 17-bits ENOB with 1.1μVP-P noise for BioZ
- A 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
- The leads-on interrupt feature allows to keep μC in deep sleep mode until a valid lead condition is detected
- 0.63μA (typ.) lead-on detect current
- 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.)
Applications
- Single-lead wireless patches for in-patient/out-patient monitoring
- Respiration and hydration monitors
- Impedance-based heart rate detection
Functional Diagram
Publié le: 2018-06-27
| Mis à jour le: 2023-04-25