MAXIM MAX30004CWV+

The MAX30004 is a complete, biopotential, analog frontend solution for wearable applications. It offers high performance for clinical and fitness applications, with ultra-low power for long battery life. The MAX30004 is a single biopotential channel providing 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. Soft powerup 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 analog-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. The MAX30004 is available in a 30-bump wafer-level package (WLP), operating over the 0℃ to +70℃ commercial temperature range.

• Heart Rate Detection with Interrupt Feature Eliminates the Need to Extract and Process the ECG Data on the Microcontroller
• Robust R-R Detection in High Motion Environment at Extremely Low Power
• Clinical-Grade Biopotential AFE with High-Resolution Data Converter
• 15.5 Bits Effective Resolution with 5μVP-P Noise
• Better Dry Starts Due to Much Improved Real World CMRR and High Input Impedance
• Fully Differential Input Structure with CMRR > 100dB
• Offers Better Common-Mode to Differential Mode Conversion Due to High Input Impedance
• High Input Impedance >500MΩ for Extremely Low Common-to-Differential Mode Conversion
• Minimum Signal Attenuation at the Input During Dry Start Due to High Electrode Impedance
• High DC Offset Range of ±650mV (1.8V, typ) Allows to Be Used with Wide Variety of Electrodes
• High AC Dynamic Range of 65mV P-P Will Help the AFE Not Saturate in the Presence of Motion/Direct Electrode Hits
• Longer Battery Life Compared to Competing Solutions
• 85μW at 1.1V Supply Voltage
• Leads-On Interrupt Feature Keeps the μC in Deep Sleep Mode with RTC Off Until Valid Lead Condition is Detected
• Lead-On Detect Current: 0.7μA (typ)
• Configurable Interrupts Allows the μC Wake-Up Only on Every Heart Beat Reducing the Overall System Power
• High-Speed SPI Interface
• Shutdown Current of 0.5μA (typ)

• Single Lead Wireless Patches for At-Home/ In-Hospital Monitoring
• Chest Band Heart Rate Monitors for Fitness Applications