MAX86171ENI+

MAX86171ENI+ is a low-noise AFE for pulse oximeter and heart rate monitor. It is an ultra-low-power optical data acquisition system with both transmit and receive channels. On the transmitter side, the MAX86171 has nine LED driver output pins, programmable from three high-current, 8-bit LED drivers. On the receiver side, MAX86171 has two low-noise charge integrating front-ends that each includes independent 19.5 bit ADCs and best-in-class ambient light cancellation (ALC) circuits, producing the highest-performing integrated optical data acquisition system on the market today. It is used in applications such as wearable devices for fitness, wellness, and medical applications, clinical accuracy, suitable for wrist, finger, ear, and other locations, optimized performance to detect: optical heart rate, heart-rate variability, oxygen saturation (SpO₂), body hydration, muscle and tissue oxygen saturation (SmO₂ and StO₂), maximum oxygen consumption (VO₂ max).

• Complete dual-channel optical data acquisition system
• Extended dynamic range up to 110dB (averaging and off-chip filtering)
• High resolution 19.5-bit charge integrating ADCs
• Supports four PD inputs for multi-parameter measurements
• Supports nine LED driver output pins generated from three 8-bit LED current drivers
• ADC integration time is 117.1μs typical at (MEASx-TINT = 0x3)
• Supports frame rates from 1fps to 2.9kfps
• Dynamic ambient light rejection is 80dB typ at (VDD = 1.8V, VLED = 5.0V, MEASx-PPGy-ADC-RGE = 16μA)
• Power-supply voltage range from 1.7V to 2V
• Operating temperature range from -40°C to +85°C, 28-pin WLP package

บันทึก

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