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MAX30100 Datasheet(PDF) 9 Page - Maxim Integrated Products |
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MAX30100 Datasheet(HTML) 9 Page - Maxim Integrated Products |
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9 / 29 page  880nm 660nm ADC AMBIENT LIGHT CANCELLATION ANALOG ADC TEMP OSCILLATOR DIGITAL FILTER DIGITAL DATA REGISTER LED DRIVERS I2C COMMUNICATION INT SDA SCL VDD IR_LED+ R_LED+ IR_DRV R_DRV GND PGND RED IR RED+IR www.maximintegrated.com Maxim Integrated │ 9 MAX30100 Pulse Oximeter and Heart-Rate Sensor IC for Wearable Health Detailed Description The MAX30100 is a complete pulse oximetry and heart- rate sensor system solution designed for the demanding requirements of wearable devices. The MAX30100 pro- vides very small total solution size without sacrificing opti- cal or electrical performance. Minimal external hardware components are needed for integration into a wearable device. The MAX30100 is fully configurable through software reg- isters, and the digital output data is stored in a 16-deep FIFO within the device. The FIFO allows the MAX30100 to be connected to a microcontroller or microprocessor on a shared bus, where the data is not being read continu- ously from the device’s registers. SpO2 Subsystem The SpO2 subsystem in the MAX30100 is composed of ambient light cancellation (ALC), 16-bit sigma delta ADC, and proprietary discrete time filter. The SpO2 ADC is a continuous time oversampling sigma delta converter with up to 16-bit resolution. The ADC out- put data rate can be programmed from 50Hz to 1kHz. The MAX30100 includes a proprietary discrete time filter to reject 50Hz/60Hz interference and low-frequency residual ambient noise. Temperature Sensor The MAX30100 has an on-chip temperature sensor for (optionally) calibrating the temperature dependence of the SpO2 subsystem. The SpO2 algorithm is relatively insensitive to the wave- length of the IR LED, but the red LED’s wavelength is criti- cal to correct interpretation of the data. The temperature sensor data can be used to compensate the SpO2 error with ambient temperature changes. LED Driver The MAX30100 integrates red and IR LED drivers to drive LED pulses for SpO2 and HR measurements. The LED current can be programmed from 0mA to 50mA (typical only) with proper supply voltage. The LED pulse width can be programmed from 200µs to 1.6ms to optimize measurement accuracy and power consumption based on use cases. Functional Diagram |
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