EM31919_Proximity with Ambient Light Sensor_Optical Sensor_Product_Leading optical sensor company in Chinese Mainland

Overview

The EM31919 is a general-purpose, monolithic, fully integrated optoelectronic device for proximity detection and ambient light detection. The internal integrated ALS+PS (940nm IR_VCSEL) allows long-distance proximity detection (30cm) and ambient light detection. Based on the reflective principle, a high-sensitivity receiver IC is used, and a class1 VCSEL emitter is used at the transmitter end, which ultimately reflects the distance in numbers. Detect the distance from the screen to the face (reflective surface) and set the corresponding distance limit through the software so as to remind the user to adjust the distance and posture at the right time to achieve the purpose of preventing myopia. The series can be used in mobile phones, tablets, learning machines and other electronic products with screens.

Features and advantages

Features:

The light source differentiation algorithm effectively differentiates between different light sources such as A light, D65, CWF, TL84, etc.
940nm high power VCSEL, small start current, flat pulse
Receiver: sensor built-in PD array, internal integration of 4 channels PD (green+red+IR+dark)
Transmitter: maximum peak current of 48 Ma, meeting class 1 standard
Receiver: internal crosstalk reduction process to reduce 50Hz/60Hz interference and random interference
Calibration: internal 32bytes OTP trimming, factory calibrated working frequency, ALS, PS, drive current, crosstalk and other parameters

Advantages:

PS narrow band filter coating for improved resistance to sunlight interference
ALS/PS with temperature compensation function
Internal crosstalk reduction processing, PS bottom noise is small, sunlight rejection up to 90k Lux
High precision, low power consumption

Parameter

Operating voltage: TX: 2.8V~4.5V; RX: 1.7V~2.0V;
Package: DFN8
Package size: 4.0*1.5*1.0
Operating temperature range: -40°C~85°C
Interface Type: I2C-1.8V