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MAX30112
Optimized Pulse-Oximeter and Heart Rate AFE for Wearable Health
Optimized Pulse-Oximeter and Heart Rate AFE for Wearable Health
MyMaxim SubscriptionsProduct Details
Key Features
Applications/Uses
Parametric specs for Bio-Sensors
| ISUPPLY (µA) (typ) | 23 |
| Shutdown Mode Supply Current (µA) (typ) | 1.4 |
| VSUPPLY (V) (min) | 1.7 |
| VSUPPLY (V) (max) | 2 |
| Resolution (bits) (ADC) | 19 |
| SNR (dB) | 89 |
| Oper. Temp. (°C) | -40 to +85 |
| Package/Pins | WLP/24 |
| Budgetary Price (See Notes) | 3.04 |
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Simplified Block Diagram
Technical Docs
| Data Sheet | Optimized Pulse-Oximeter and Heart Rate AFE for Wearable Health | Aug 30, 2017 |
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .
Parameters
Parametric specs for Bio-Sensors
| ISUPPLY (µA) (typ) | 23 |
| Shutdown Mode Supply Current (µA) (typ) | 1.4 |
| VSUPPLY (V) (min) | 1.7 |
| VSUPPLY (V) (max) | 2 |
| Resolution (bits) (ADC) | 19 |
| SNR (dB) | 89 |
| Oper. Temp. (°C) | -40 to +85 |
| Package/Pins | WLP/24 |
| Budgetary Price (See Notes) | 3.04 |
Key Features
- 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
Applications/Uses
- Fitness Wearable Devices
- In-Ear Wearable Devices
- SpO2 Monitoring Devices
- Wrist-Worn Wearable Devices
Description
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.
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.
Technical Docs
| Data Sheet | Optimized Pulse-Oximeter and Heart Rate AFE for Wearable Health | Aug 30, 2017 |
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .
Request a Quote