SI1182-B3-GM DFN-10 Heart Rate Sensor SILICON LABS Original Stock

The module includes an IC with integrated photodetector, current

to-digital converter, and LED drivers, along with support for ECG

measurements. It also supports external LEDs and photodiodes.

This optical heart rate sensor includes I2C and SPI digital interfaces, a programmable

event interrupt output, an analog-to-digital converter, host communications processor,

four integrated LED drivers, and inputs for two external photodiodes

A large internal photodiode creates a high-quality signal with different skin types. A low

noise ECG interface (with support for leads on/off detection) allows you to take ECG

measurements independent of, or interleaved with, PPG measurements.

The Si1182 offers excellent performance under a wide dynamic range. The Si1182 is

provided in a 24-pin optical QFN module and is capable of operation from 1.71 to 3.63 V

over the –40 to +85°C temperature range.

KEY FEATURES

• Low power, high dynamic range sensor

optimized for wrist-based PPG and ECG

sensing

• Make time synchronized PPG and ECG

measurements without host intervention

• Built-in single ECG channel and leads

on/off detection optimized for high

impedance dry electrode applications

• Supports integration times from 9 μs to

multiple seconds

• Average PPG sensor current <50 μA

• 24 bit ADC with over 100 dB dynamic

range and built in averaging

• 2kB FIFO interface

• Internal photodiode

• Support for external photodiodes

• Low sleep current: 500 nA

• Low power consumption: Flexible duty

cycle optimizes power consumption

• Short delay between samples improves

ambient light rejection

• Four LED drivers,independently

programmable from 1.7 to 310 mA

• I2C host communications with interrupts

• SPI host communications with interrupts

• Supports synchronization with an

accelerometer

• 3.7×7.0×1.1 mm2 LGA module

• Rated for operation from –40 to 85 °C

Sample Applications

• Fitness wearables

• Smart watches

• Other wearable devices that require low power heart rate monitoring and ECG meas

urements