ams TSL2740 Ambient Light Sensor

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描述

The TSL2740 includes both proximity detection and very-high sensitivity light-to-digital converter ambient light sensing (ALS) features. The proximity detection feature provides object detection using photodiode detection with reflected IR energy. The detect/release events are interrupt driven, and occur when proximity result crosses upper and/or lower threshold settings. The proximity engine features offset adjustment registers to compensate for unwanted IR energy reflection at the sensor. Proximity results are further improved by automatic ambient light subtraction. The ALS feature approximates the human eye response to light intensity under varying lighting conditions and transforms this light intensity to a digital signal output capable through a 1.8V I²C interface. The ALS sensor features 2 output channels, a visible channel and an IR channel. The visible channel has a photodiode with a photopic Interferometric UV and IR blocking filter and the IR channel has a photodiode with an IR pass filter. Each channel has a dedicated integrating data converter which converts photodiode current into a 16-bit digital output. This digital output can be interfaced with a microprocessor where illuminance in lux is derived to accurately measure ambient light to control a displays baklight.

详情

特点

  • Integrated on-chip photopic filter
  • High Sensitivity down to mLux levels
  • 0.18µm process technology with 1.8V I²C
  • 1M:1 dynamic range
  • Programmable proximity offset adjustment
  • Proximity automatic ambient light subtraction

优势

  • Provides near photopic responsiveness
  • Design flexibility for dark glass & placement
  • Reduces power consumption
  • Enables dark room to sunlight operation
  • Compensates for unwanted IR energy system crosstalk reflection
  • Compensates for unwanted ambient light photodiode current

产品参数

Function
ambient light sensing
proximity detection
电源电压
典型值
1.8 V
最小值
1.7 V
最大值
1.98 V
接口
输入
I²C slave (400kHz)
输出
I²C slave (400kHz)
工作环境温度
最小值
-30 °C
最大值
85 °C
Emitter quantity
external
Integrated diffuser
No
封装
QFN
封装尺寸
l 典型值
2.0 mm
w 典型值
2.0 mm
h 典型值
0.5 mm
Input/Output Voltage
1.8 V

订单代码

产品类别 描述 单号 可行
TSL27403M
TSL27403

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