Description

EM7028 is a low-power I2C interface module includes Heart Rate Sensor(HRS) and internal LED CurrentDrivers with 2 Green LED. It can work in both continuous mode and pulse mode. It is designed forapplications of Heart Beat Rate detection esp. such as smart watch etc.Heart Rate Sensor in continuous mode is designed to monitor heart rate by optical detection. A 16-bit ADCdetects the result constantly with adjustable gain and resolution.Heart Rate Sensor in pulse mode is designed to monitor heart rate by optical detection in low-power. It alsoacts as a proximity sensor with rejection of ambient light noise. In order to removing component variationsand eliminate offset caused by IR reflection, 2 registers were specially defined for compensation and highdynamic range of detection.HRS in continuous mode stores ADC output result into HRS1 registers, while HRS in pulse mode storesADC output result into HRS2 registers. All pixels are controlled by analog-MUX in different modes.

Features

Heart-Rate Sensors(HRS) with built-in 2 LED of 525nm wavelength integrated in a single OpticalModule 50Hz/60Hz Flicker Noise Rejection Temperature Compensation Higher Sensitivity of Proximity Sensing HRS in continuous mode with higher detection rate HRS in pulse mode with Ambient Light Rejection HRS detect rates is up to 1000/s 2048 Steps Programmable LED current driver for flexibility and part-to-part calibration 16bits ADC of Heart Rate Sensor Offset register adjustment for compensation of DC noise Programmable Interrupt modes Low Average Operation Power consumption Output Type: I2C Bus (HRS2) up to 400K Hz Operation Voltage 2.5V ~ 3.6V Logic Interface Voltage VBUS=1.8V or VBUS=VDD Minimum External Components Package: (4.0mmX2.4mmX1.35mm) RoHS package