数字距离传感器,带双环境光传感器和中断

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概览

NOA3315 在一个集成式单片器件中组合了先进的数字距离传感器、带双环境光传感器 (ALS) 的 LED 驱动器以及带有中断功能的三模式 I2C 接口。多功率管理功能和极低有效感应功耗直接满足了电池供电手机和移动 Internet 设备的电源要求。距离传感器测量反射光强度,且具有极高精度和绝佳环境光抑制。NOA3315 使用 16:1 可编程 LED 驱动器电流范围和 30 dB 总体距离检测范围实现一个距离传感器系统。双环境光传感器中,一个带光斑光滤波器,一个不带滤波器。两个均具有暗电流补偿和高灵敏度,避免了不准确的光度检测,即使存在暗罩玻璃也能确保恰当的背光控制。NOA3315 能够实时测量近距离/远距离检测的距离,还能针对环境照明条件作出响应以控制显示屏背光强度,因此增强了屏幕界面性能,改善了用户体验。

  • Senses human presence in terms of distance and sensesambient light conditions, saving display power inapplications such as:♦ Smart phones, mobile internet devices, MP3 players,GPS♦ Mobile device displays and backlit keypads
  • Mobile device displays and backlit keypads
  • Smart phones, mobile internet devices, MP3 players, GPS
  • Proximity Sensor, LED Driver and Dual ALS in OneDevice
  • Very Low Power Consumption
  • These Devices are Pb−Free, Halogen Free/BFR Freeand are RoHS Compliant
  • Proximity detection distance threshold I2Cprogrammable with 12−bit resolution and eightintegration time ranges (16−bit effective resolution)
  • Effective for Measuring Distances up to 200 mm andBeyond
  • Excellent IR and Ambient Light Rejection includingSunlight (up to 50K lux) and CFL Interference
  • Programmable LED Drive Current from 10 mA to160 mA in 5 mA Steps, no External Resistor Required
  • User Programmable LED Pulse Frequency
  • Dual ALS senses ambient light and provides 16−bitoutput counts on the I2C bus directly proportional to theambient light intensity
  • Photopic Spectral Response of ALS1 Nearly MatchesHuman Eye
  • Broadband response of ALS2 supports compensationfor spectral shifts encountered with different types ofcover glass
  • Dynamic Dark Current Compensation
  • Linear Response over the Full Operating Range
  • 3 ranges – 100 counts/lux, 10 counts/lux, 1 count/lux
  • Senses Intensity of Ambient Light from 0.02 lux to 52klux with 21−bit Effective Resolution (16−bit converter)
  • Programmable Integration Times (50 ms, 100 ms,200 ms, 400 ms)

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NOA3315W

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0

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75

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-40

80

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