ISL29023

Integrated Digital Light Sensor with Interrupt

Product Status: Mass Production

OVERVIEW

The ISL29023 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 90ms and is user adjustable from 11µs to 90ms, depending on oscillator frequency and ADC resolution. In normal operation, typical current consumption is 70µA. 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 ISL29023 supports a software and hardware interrupt that remains asserted until the host clears it through 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 ISL29023 is specified for operation over the -40°C to +85°C ambient temperature range.

KEY FEATURES

  • Resolution: 16-bits ADC
  • Integrated noise reduction: 50/60Hz
  • Light sensor close to human eye response
  • Excellent light sensor IR and UV rejection
  • Range selection via I2C
  • Range1 = 0.015 to 1,000 Lux
  • Range2 = 0.06 to 4,000 Lux
  • Range3 = 0.24 to 16,000 Lux
  • Range4 = 0.96 to 64,000 Lux
  • Shutdown modes: Software and Automatic
  • Supply current (Max) : 85µA
  • Shutdown current (Max): 0.3µA
  • Control interface: I2C and SMB Compatible
  • I2C 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 2.0x2.1x0.7 ODFN

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL29023
Basic Information
Production Status
Mass Production
Peak Spectral Sensitivity
540 nm
VS (min)
2.25 V
VS (max)
3.63 V
ICC
70
Resolution Bits
16
Lux Range (min) (lux)
0.015
Lux Range (max) (lux)
65535
Counts/Lux (max) (Counts)
65
Dark ADC Code @ Ev=0Lux (max) (Counts)
5
Gain Selection?
Yes
Qualification Level
Standard
Bus/Output Interface
I2C
Address Selection Pins?
No
Package Dimensions (mm)
2.0x2.1x0.70
Features
ALS interrupt
Enable Pin?
Software Enabled
Can Sample
YES
Temperature Range
-40 to +85

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