isl76671 Intersil Corporation, isl76671 Datasheet

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isl76671

Manufacturer Part Number
isl76671
Description
Low Power,
Manufacturer
Intersil Corporation
Datasheet
Low Power, <100 Lux Optimized, Analog Output
Ambient Light Sensor
ISL76671
The ISL76671 is a low cost, light-to-voltage silicon optical sensor
combining a photodiode array, a non-linear current amplifier and
a micro-power op amp on a single monolithic IC. Similar to the
human eye, the photodiode array has peak sensitivity at 550nm
and spans the wavelength range 400nm to 600nm, rejecting UV
and IR light. The input luminance range is from 0.01 lux to 100
lux.
The integrated non-linear current amplifier boosts and converts
the photodiode signal into a square root output format, extending
dynamic range while maintaining excellent sensitivity in dimly lit
conditions. As such, the part is ideal for measuring incident
daylight when mounted behind heavily smoked bezels used
around displays or behind mirrors.
The device consumes minimum power. A dark current
compensation circuit minimizes the effect of temperature
dependent leakage currents in the absence of light, improving
the light sensitivity at low lux levels. The output gain has been
optimized to require a relatively low value external bias resistor
that falls within recommended automotive EMI limits. The
built-in 1µA op amp gives the ISL76671 an output voltage driving
advantage for heavier loads that can drive an ADC directly.
The ISL76671 is housed in an ultra compact 2mmx2.1mm ODFN
plastic surface mount package. Operation is rated from -40°C to
+105°C, Grade 2 per AECQ100.
December 12, 2011
FN7716.1
1
GND
VDD
2
1
LIGHT DATA
PROCESS
PHOTODIODE
FIGURE 1. SIMPLIFIED BLOCK DIAGRAM
ARRAY
OUTPUT CURRENT a √LIGHT INTENSITY
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
AMPLIFIER
CURRENT
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
Features
• Square Root Voltage Output
• 0.01 lux to 100 lux Range
• 1.8V to 3V Supply Range
• Close to Human Eye Spectral Response
• Fast Response Time
• Internal Temperature Compensation
• Good IR Rejection
• Low Supply Current
• Operating Temperature Range -40°C to +105°C
• 6 Lead ODFN: 2mmx2.1mmx0.7mm
• Pb-Free (RoHS Compliant)
• AECQ100 Qualified
Applications
• Display Backlight Control - Central Info Display &
• Anti-glare Mirror Systems - Specified to Operate Behind Bezel
Instrumentation
Mounting
All other trademarks mentioned are the property of their respective owners.
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Copyright Intersil Americas Inc. 2011. All Rights Reserved
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REXT
VOUT
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isl76671 Summary of contents

Page 1

... EMI limits. The built-in 1µA op amp gives the ISL76671 an output voltage driving advantage for heavier loads that can drive an ADC directly. The ISL76671 is housed in an ultra compact 2mmx2.1mm ODFN plastic surface mount package. Operation is rated from -40° ...

Page 2

... RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020. 3. For Moisture Sensitivity Level (MSL), please see device information page for ISL76671. For more information on MSL please see techbrief TB477. 2 ...

Page 3

... SR Slew Rate of Op Amp V Offset Voltage of Op Amp OS NOTE: 6. Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified. Temperature limits established by characterization and are not production tested. 3 ISL76671 Thermal Information (T = +25 C) ° A Thermal Resistance (Typical ODFN (Notes ...

Page 4

... WAVELENGTH (nm) FIGURE 4. SPECTRAL RESPONSE RADIATION PATTERN 0° 10° 10° 20° LUMINOSITY 30° ANGLE 40° 50° 60° 70° 80° 90° 0.2 RELATIVE SENSITIVITY FIGURE 6. RADIATION PATTERN 4 ISL76671 INPUT LIGHT DD V OUT OUTPUT R EXT +25° 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 1.0k 1.1k 350 FIGURE 5 ...

Page 5

... TEMPERATURE ( °C ) FIGURE 10. OUTPUT VOLTAGE vs TEMPERATURE AT 0 LUX 1.001 10 LUX 0.999 0.997 50 LUX 50 LUX 0.995 0.993 1.8 2.0 2.2 2.4 2.6 SUPPLY VOLTAGE (V) FIGURE 12. NORMALIZED OUTPUT VOLTAGE vs SUPPLY VOLTAGE 5 ISL76671 +25° 0.45 0.40 0.35 0.30 0.25 0.20 0.15 0.10 0.05 10 100 1000 FIGURE 9. OUTPUT VOLTAGE vs LIGHT INTENSITY 0.01 LUX TO 3.0 2.5 2.0 1.5 1 ...

Page 6

... FIGURE 14. SUPPLY CURRENT vs SUPPLY VOLTAGE 1.10 1.05 10 LUX 1.00 100 LUX 50 LUX 0.95 0.90 50 LUX 50 LUX 0.85 -60 -40 - TEMPERATURE (° FIGURE 16. NORMALIZED OUTPUT VOLTAGE vs TEMPERATURE FREQUENCY = 100Hz LIGHT SOURCE ISL76671 OUTPUT (V) 100µs/DIV FIGURE 18. DELAY TIME vs LUX CHANGE FROM 0 LUX 6 ISL76671 +25° EXT 23.50 100 LUX 23.45 23.40 23.35 23.30 23.25 23.20 2.8 3.0 3.2 2 ...

Page 7

... ISL76671 Optical Sensor Location Outline The green area in Figure 20 shows the optical sensor location outline of ISL76671. Along the pinout direction, the center line (CL) of the sensor coincides with that of the packaging. The sensor width in this direction is 0.39mm. Perpendicular to the pinout direction, the CL of the sensor has an 0.19mm offset from the CL of packaging away from pin 1 ...

Page 8

... However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries. For information regarding Intersil Corporation and its products, see 8 ISL76671 www.intersil.com/askourstaff http://rel.intersil.com/reports/sear For additional products, see www ...

Page 9

... LEAD OPTICAL DUAL FLAT NO-LEAD PLASTIC PACKAGE (ODFN) Rev 3, 5/11 2.10 6 PIN 1 INDEX AREA (4X) 0.10 TOP VIEW 2.50 PACKAGE OUTLINE 2.10 0.65 (4x0.65) (6x0.30) (6x0.55) TYPICAL RECOMMENDED LAND PATTERN 9 ISL76671 A B 0.65 2. 0.30±0.05 BOTTOM VIEW MAX 0.75 (1.35) C (6x0.20) NOTES: 1. Dimensions are in millimeters. Dimensions for Reference Only. 2. Dimensioning and tolerancing conform to ASME Y14.5m-1994. ...

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