ISL29023 Digital Light Sensor

ISL29023 Digital Light Sensor

Renesas' ISL29023 is an integrated ambient and infrared light to digital converter with an I2C Interface that is SMBus compatible. The advanced self-calibrated photodiode array emulates human eye response with excellent IR rejection. The on-chip ADC is capable of rejecting 50 Hz and 60 Hz 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 90 ms and is user adjustable from 11 µs to 90 ms, depending on oscillator frequency and ADC resolution. In normal operation, typical current consumption is 70 µA. 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 I2C interface. The power consumption can be reduced to less than 0.3 µA when powered down. The ISL29023 supports a software and hardware interrupt that remains asserted until the host clears it through the I2C interface. The function of the ADC conversion continues without stopping after interrupt is asserted. Designed to operate on supplies from 2.25 V to 3.63 V with an I2C supply from 1.7 V to 3.63 V, the ISL29023 is specified for operation over the -40°C to +85°C ambient temperature range. The rich feature set of the ISL29023 makes it suitable for mobile devices, digital cameras, TV’s, smart phones, IoT, industrial and medical light sensing applications.

Features
  • Resolution: 16-bits ADC
  • Integrated noise reduction: 50/60 Hz
  • Light sensor close to human eye response
  • Excellent light sensor IR and UV rejection
  • Range selection via I2C:
    • Range1: 0.015 lux to 1,000 lux
    • Range2: 0.06 lux to 4,000 lux
    • Range3: 0.24 lux to 16,000 lux
    • Range4: 0.96 lux to 64,000 lux
  • Shutdown modes: software and automatic
  • Supply current (max.): 85 µA
  • Shutdown current (max.): 0.3 µA
  • Control interface: I2C and SMB compatible
  • I2C power supply: 1.7 V to 3.63 V
  • Sensor power supply: 2.25 V to 3.63 V
  • Operating temperature range: -40°C to +85°C
  • Small form factor package: 6 Ld 2.0 ODFN x 2.1 ODFN x 0.7 ODFN
Applications
  • Mobile devices:
    • Smart phone
    • PDA
    • GPS
  • Computing devices
    • Notebook PC
    • Webpad
  • Consumer devices:
    • LCD-TVs
    • Digital picture frame
    • Digital camera
  • Industrial and medical light sensing
Manufacturer