ISL29029中文资料带智能中断和睡眠模式的低功耗环境光和接近传感器数据手册Renesas规格书

描述 Description

The ISL29029 is an integrated ambient and infrared light-to-digital converter with a built-in IR LED driver and I2C Interface (SMBus Compatible). This device uses two independent ADCs for concurrently measuring ambient light and proximity in parallel. The flexible interrupt scheme is designed for minimal microcontroller utilization.
For ambient light sensor (ALS) data conversions, an ADC converts photodiode current (with a light sensitivity range up to 2000 Lux) in 100ms per sample. The ADC rejects 50Hz/60Hz flicker noise caused by artificial light sources.
For proximity sensor (PROX) data conversions, the built-in driver turns on an external infrared LED and the proximity sensor ADC converts the reflected IR intensity to digital. This ADC rejects ambient IR noise (such as sunlight) and has a 540µs conversion time.
The ISL29029 provides low power operation of ALS and PROX sensing with a typical 138µA normal operation current (110µA for sensors and internal circuitry, ~28µA for external LED) with 220mA current pulses for a net 100µs, repeating every 800ms (or under).
The ISL29029 uses both a hardware pin and software bits to indicate an interrupt event has occurred. An ALS or PROX interrupt is defined as a measurement which is outside a set window. The user may also require that both ALS/PROX interrupts occur at once, up to 16 times in a row before activating the interrupt pin.
The ISL29029 is designed to operate from 2.25V to 3.63V over the -40°C to +85°C ambient temperature range. It is packaged in a clear, lead-free 8 lead ODFN package.

特性 Features

• Works Under All Light Sources Including Sunlight
• Intelligent Interrupt Scheme Simplifies µC Code
• Ambient Light Sensing
• 50Hz/60Hz Flicker Noise and IR Rejection
• Selectable 125/2000 Lux Range
• Proximity Sensor with Broad IR Spectrum
• IR LED Driver with I2C Programmable Sink Currents
• Periodic Sleep Time up to 800ms Between Pulses
• Intelligent and Flexible Interrupts
• Adjustable Interrupt Persistency
• Ultra Low Power
• 110µA for Sensors and Internal Circuitry
•
• Set Registers; Wait for Interrupt
• Temperature Compensated
• Additional Features
• 2.25V to 3.63V Sensor Power Supply
• I2C Address Selection Pin

应用 Application

• Display and Keypad Dimming Adjustment and Proximity Sensing for:
• Computing Devices: Laptop PC, Netbook
• Industrial and Medical Light and Proximity Sensing