ISL76683_1103 Datasheet, PDF (1/17 Pages) Intersil Corporation – Light-to-Digital Output Sensor

Light-to-Digital Output Sensor with Gain Selection,
Interrupt Function and I²C Interface
ISL76683
The ISL76683 is an integrated light sensor with an internal
integrating ADC intended for automotive applications. The ADC
provides 16-bit resolution and is capable of rejecting 50Hz and
60Hz flicker caused by artificial light sources. The I²C interface
provides four user programmable lux sensitivity ranges for
optimized counts/lux in a variety of lighting conditions. In
addition, the I²C interface provides multi-function control of the
sensor and remote monitoring capabilities.
In normal operation, power consumption is less than 300µA.
Furthermore, a software power-down mode controlled via the I²C
interface reduces power consumption to less than 1µA.
The ISL76683 supports twin (upper & lower) user programmed
thresholds and provides a hardware interrupt that remains
asserted low until the host clears it via the I²C control interface.
Designed to operate on supplies from 2.5V to 3.3V, the ISL76683 is
qualified to AECQ100 and specified for operation over the -40°C to
+105°C (grade 2) ambient temperature range. To achieve this, the
ISL76683 is packaged in a special extended temperature clear
package.
Features
• Range select via I²C
- Range 1 = 0 lux to 1000 lux
- Range 2 = 0 lux to 4000 lux
- Range 3 = 0 lux to 16,000 lux
- Range 4 = 0 lux to 64,000 lux
• Human Eye Response (540nm Peak Sensitivity)
• Temperature Compensated
• 16-bit Resolution
• Adjustable Sensitivity: up to 65 Counts per Lux
• User-programmable Upper and Lower Threshold Interrupt
• Simple Output Code, Directly Proportional to Lux
• IR + UV Rejection
• 50Hz/60Hz Rejection
• 2.5V to 3.3V Supply
• 6 Ld ODFN (2.1mmx2mm)
• Pb-free (RoHS compliant)
Applications
• Automotive Ambient Light Sensing
• Backlight Control
• Lighting Controls
PHOTODIODE 1
VDD
1
MUX
INTEGRATING
ADC
COMMAND
REGISTER
DATA
REGISTER
PHOTODIODE 2
EXT
I²C
IREF
TIMING
3
REXT
FOSC
2¹⁶
COUNTER
2
GND
ISL76683
INT
INTERRUPT
FIGURE 1. BLOCK DIAGRAM
5 SCL
6 SDA
4 INT
March 17, 2011
1
FN7697.2
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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