ISL29021
ISL29021 is Digital Proximity Sensor manufactured by Renesas.
Digital Proximity Sensor with Interrupt Function
The ISL29021 is an integrated proximity and infrared sensor with a built-in IR LED driver and I2C Interface (SMBus patible). This device provides infrared sensing to allow proximity estimation featured with interrupt function.
For infrared and proximity sensing, an internal ADC has been designed based on the charge-balancing A/D conversion technique.
The ADC is used to digitize the output signal from the photodiode array when the internal IR LED driver is turned on and off for the programmed time periods under user-selected modulation frequency to drive the external IR LED. As this proximity sensor employs a noise cancellation scheme to highly reject unwanted IR noise, the digital output of proximity sensing decreases with distance. The driver output current is user selectable up to 100m A to drive different types of IR emitters LEDs.
Four different modes of operation can be selected via the I2C interface: programmable IR...
