MAX30112
Optimized Pulse-Oximeter and Heart Rate AFE for Wearable Health
Optimized Pulse-Oximeter and Heart Rate AFE for Wearable Health
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Overview
Features and Benefits
- Reflective or Transmissive Heart Rate, Heart Rate Variability, or SpO2 Monitoring
- Transmit Section
- Two 8-bit LED Current DACs
- Four Current Ranges 50mA, 100mA, 150mA, 200mA
- Low Noise Current Sources for High Peak Transmit to Receive Dynamic Range
- Low 160mV Dropout to Support Direct Drive From Rechargeable Li Battery
- High Output Impedance and High Supply Rejection to Support Unregulated Supply or Direct Drive From Boost Switcher Supply
- Receive Section
- 19-bit Optical ADC Path to Support the Lowest Perfusions Situations
- Low 25pA-RMS Input Referred Noise to Minimize LED Power Under Most Conditions
- High Ambient Light Input Range of 200μA and to Support Extraction of HRM Signal in the Most Adverse Lighting Conditions
- Built-in Front And Back End Ambient Light Cancellation, Improving Rejection and Eliminating System Complexity of Dealing with Ambient Light
- Short Exposure Pulse Widths of 52μs, 104μs, 206μs, 417μs for Efficient Uses of LED Light
- Multiple Sample Rate Options from 20sps to 3.2ksps
- Ultra-Low-Power Operation for Mobile and Body-Wearable Device
- Dynamic Power Down Modes to 100sps for Low-Power Consumption
- Full AFE Power Consumption of Less Than 25μA (typ) at 25sps
- Large 32 Sample FIFO to Support Batch Processing in the Microcontroller
- Variety of System Monitors Mappable to Interrupts to Off-Load System Monitoring Functions From the Microcontroller
- Low Shutdown Current = 1.4μA (typ)
- I2C interface
- Supports a Single 1.8V Supply with Separate 3.1V to 5.25V LED Supply
- Miniature 2.8mm x 2.0mm, 6x4, 0.4mm Ball Pitch WLP Package
- -40°C to +85°C Operating Temperature Range
Product Details
The MAX30112 is a complete optical pulse oximetry and heart rate detection integrated analog front-end. The MAX30112 has a high-resolution, optical readout signal-processing channel with built-in ambient light cancellation, as well as high-current LED driver DACs, to form a complete optical readout signal chain. With external LED(s) and photo diode(s), the MAX30112 offers the lowest power, highest performance heart rate detection solution for wrist applications.
The MAX30112 operates on a 1.8V main supply voltage, with a separate 3.1V to 5.25V LED driver power supply. The device supports a standard I2C compatible interface, as well as shutdown modes through the software with near-zero standby current, allowing the power rails to remain powered at all times.
Applications
- Fitness Wearable Devices
- In-Ear Wearable Devices
- SpO2 Monitoring Devices
- Wrist-Worn Wearable Devices
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Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
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IBIS Models
IBS
MAX30112 IBIS Model
113.52K
Reference Designs (1)
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