MAX86170A
Best-in-Class Optical Pulse Oximeter and Heart-Rate Sensor AFE for Wearable Health
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The MAX86170A is an ultra-low-power optical data-acquisition system with both transmit and receive channels. On the transmitter side, the MAX86170A has six LED driver output pins, programmable from three high-current, 8-bit LED drivers. On the receiver side, MAX86170A has two low-noise charge integrating front-ends that each includes independent 20-bit ADC and best-in-class ambient light cancellation (ALC) circuits, producing the highest performing integrated optical data acquisition system on the market today.
Due to its low power consumption, compact size, ease and flexibility of use, the MAX86170A is ideal for a wide variety of optical sensing applications such as pulseoximetry and heart-rate detection.
The MAX86170A operates on a 1.8V main supply voltage and a 3.1V to 5.5V LED driver supply voltage. The device supports both I2C- and SPI-compatible interfaces in a fully autonomous way. The device has a large 256-word builtin FIFO.
The MAX86170A is available in a compact WLP package 2.78mm x 1.71mm with 6 x 4, 0.4mm ball pitch.
主な特長
- Complete Dual-Channel Optical Data-Acquisition System
- Ultra Low-Power Operation for Wearable Devices
- Low-Power Operation, Optical Readout Channel < 11μA at 25fps
- Exposure Integration Period Ranging from 14.6μs to 117.1μs
- Low Shutdown Current < 1µA
- Excellent Top-End Dynamic Range > 91dB in White Card Loop-Back Test (Nyquist Sample-to-Sample Variance)
- Extended Dynamic Range up to 110dB (Averaging and Off-Chip Filtering)
- Supports Frame Rates from 1fps to 2.9kfps
- High Resolution 20-Bit Charge Integrating ADCs
- Supports Four PD Inputs for Multi-Parameter Measurements
- Supports Six LED Driver Output Pins Generated from Three 8-Bit LED Current Drivers
- Low Dark Current Noise of < 50pARMS (Sample-to- Sample Variance in 117.1µs Integration Time)
- Excellent Ambient Range and Rejection Capability
- > 100μA Ambient Photodetector Current
- > 70dB Ambient Rejection at 120Hz
- Miniature 2.78mm x 1.71mm 6 x 4, 0.4mm Ball Pitch WLP Package
- -40°C to +85°C Operating Temperature Range
アプリケーション/用途
- フィットネス、ウェルネス、および医療用ウェアラブル機器
- 医療用精度
- 手首、指、耳、およびその他の部位に最適
