ISL29035

Integrated Digital Light Sensor with Interrupt

Product Status: Mass Production(*)

OVERVIEW

The ISL29035 is an integrated ambient and infrared light-to-digital converter with I2 C (SMBus compatible) Interface. Its advanced self-calibrated photodiode array emulates human eye response with excellent IR rejection. The on-chip ADC is capable of rejecting 50Hz and 60Hz flicker caused by artificial light sources. The Lux range select feature allows users to program the Lux range for optimized counts/Lux.

For ambient light sensing, an internal 16-bit ADC has been designed based upon the charge-balancing technique. The ADC conversion time is nominally 105ms and is user adjustable from 11μs to 105ms, depending on oscillator frequency and ADC resolution. In normal operation, typical current consumption is 57μA. In order to further minimize power consumption, two power-down modes have been provided. If polling is chosen over continuous measurement of light, the auto power-down function shuts down the whole chip after each ADC conversion for the measurement. The other power-down mode is controlled by software via the I2 C interface. The power consumption can be reduced to less than 0.3μA when powered down.

The ISL29035 supports a software brownout condition detection. The device powers up with the brownout bit asserted until the host clears it through the I2 C interface.

The ISL29035 supports a software and hardware interrupt that remains asserted until the host clears it through the I2 C interface. Function of ADC conversion continues without stopping after interrupt is asserted.

Designed to operate on supplies from 2.25V to 3.63V with an I2 C supply from 1.7V to 3.63V, the ISL29035 is specified for operation across the -40°C to +85°C ambient temperature range.

KEY FEATURES

  • Resolution: 16-bit ADC
  • Wide dynamic range: 1:4,200,000
  • Integrated noise reduction: 50/60Hz
  • Close to human eye response with excellent IR/UV rejection
  • Shutdown modes: software and automatic
  • Programmable interrupt threshold with persistence filter
  • Supply current (typical): 57μA
  • Shutdown current (maximum): 0.51μA
  • I2C (SMB compatible) power supply: 1.7V to 3.63V
  • Sensor power supply: 2.25V to 3.63V
  • Operating temperature range: -40°C to +85°C
  • Small form factor package: 6 Ld 1.5x1.6x0.75 ODFN

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL29035
Basic Information
生产状态
Mass Production(*)
峰值光谱灵敏度
550 nm
VS (最小值)
2.25 V
VS (最大值)
3.63 V
ICC
57
分辨率位
16
照度范围 (最小值) (lux)
0.015
照度范围 (最大值) (lux)
64000
计数/Lux (最大值) (计数)
65
暗ADC代码@ Ev=0Lux (最大值) (计数)
5
增益选择?
Yes
资质级别
Standard
总线/输出接口
I2C
地址选择引脚?
No
封装尺寸 (mm)
1.5X1.6X0.75
特性
ALS interrupt
启用引脚?
Software Enabled
CAN 采样
YES
温度范围
-40 to +85

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