ISL29002 Intersil Corporation, ISL29002 Datasheet

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ISL29002

Manufacturer Part Number
ISL29002
Description
Manufacturer
Intersil Corporation
Datasheet
Light-to-Digital I
The ISL29002 is an integrated light sensor with a built-in
integrating type ADC and a standard I
device transforms illuminance, ambient light level in lux, into
a digital output signal accessible through I
precisely converts illuminance from 1lux to 100,000lux. The
ADC features up to 15-bit effective resolution. The sensor
includes another photodiode covered with metal to reduce
the effects of dark output reading that may be significant in
low lux levels.
The ISL29002 can control display panel backlighting depending
on ambient light conditions, adding artificial intelligence by
approximating the response of a human eye. The ISL29002
can also manage portable peripheral illumination based upon
lighting conditions extending battery life.
In normal operation, the ISL29002 consumes less than 300µA
of supply current. A software power down mode is controlled
via the I
supply current is then reduced to less than 88µA.
Designed to operate on supplies from 2.5V to 3.3V, the
ISL29002 is specified for operation over the 0°C to +70°C
ambient temperature range. It is packaged in a clear, Pb-free
8 Ld ODFN package.
Block Diagram
PHOTODIODE 1
PHOTODIODE 2
2
REXT
C interface and disables all but the I
3
MUX
FOSC
IREF
VDD
1
2
INTEGRATING
C Sensor
GND
ADC
®
2
1
COUNTER
2
16
Data Sheet
2
C interface. The
2
2
C. The sensor
A2
6
C interface. The
COMMAND
REGISTER
REGISTER
DATA
I
A1
2
5
C
A0
4
1-888-INTERSIL or 1-888-468-3774
7
8
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
SCL
SDA
Features
• I
• 88µA disabled current
• Adjustable max lux range: 10,000 to 100,000lux
• Up to 15-bit effective resolution
• Adjustable resolution: 0.15 to 1.65 counts per lux
• Simple output code proportional to lux
• Flicker/noise rejection
• Variable integration time; 50ms to 550ms
• 2.5V to 3.3V supply
• 8 Ld ODFN (3mm x 3mm)
• Temperature compensation
• Pb-free available (RoHS compliant)
Applications
• Backlight sensing
• Automatic backlight adjustment
• Backlight linearity adjustments
Ordering Information
NOTE: Intersil Pb-free ODFN products employ special Pb-free
material sets; molding compounds/die attach materials and 100%
matte tin plate termination finish, which are 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.
Pinout
ISL29002CROZ
ISL29002CROZ-T7 0 to 70
PART NUMBER
2
C interface fast mode at 400kHz
(Note)
August 2, 2006
All other trademarks mentioned are the property of their respective owners.
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
REXT
GND
VDD
A0
Copyright © Intersil Americas Inc. 2006. All Rights Reserved.
RANGE
0 to 70
TEMP.
ISL29002 (8 LD ODFN)
1
2
3
4
(°C)
TOP VIEW
THERMAL
TAPE &
REEL
PAD
7”
-
8 Ld 3x3 ODFN MDP0052
8 Ld 3x3 ODFN MDP0052
PACKAGE
(Pb-Free)
8
7
6
5
SDA
SCL
A2
A1
ISL29002
FN7465.1
DWG. #
PKG.

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ISL29002 Summary of contents

Page 1

... Data Sheet 2 Light-to-Digital I C Sensor The ISL29002 is an integrated light sensor with a built-in 2 integrating type ADC and a standard I device transforms illuminance, ambient light level in lux, into a digital output signal accessible through I precisely converts illuminance from 1lux to 100,000lux. The ADC features up to 15-bit effective resolution. The sensor ...

Page 2

... Minimum I C Clock Rate is guaranteed by design. 3. Fluorescent light is substituted by an LED at production. 4. The voltage threshold levels of the SDA and SCL pins are VDD dependent ISL29002 = 25°C) Maximum Die Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . +125°C Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . .-45°C to +100°C ESD, Human Body Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2kV ...

Page 3

... SUPPLY VOLTAGE (V) FIGURE 3. OUTPUT CODE vs SUPPLY VOLTAGE 3 ISL29002 2 C address. The address pins have an open gate equivalent circuit. These are the least-significant bits of the address. 40(hex) through 48(hex address serial clock line ...

Page 4

... FIGURE 7. OUTPUT CODE vs TEMPERATURE k = 7.5 100 HUMAN VISIBILITY CIE STANDARD 300 400 500 600 700 WAVELENGTH (nm) FIGURE 9. RELATIVE INTENSITY 4 ISL29002 R = 100kΩ (Continued) ext 10 1000 lux 60 100 o C) FIGURE 6. OUTPUT CODE FOR 0LUX vs TEMPERATURE 330 329 328 327 1000 lux 326 325 ...

Page 5

... Then ISL29002 will hold the SDA line to send data to master. Note that the master need not send an address register to access the data. As soon as the ISL29002 receives the read bit. It will send 4 bytes. The 1st byte is the LSB of the sensor reading. The 2nd byte is the MSB of the sensor reading. The 3rd byte is LSB of the counter reading ...

Page 6

... R = 100kΩ). EXT COMMAND 8C(hex) ADC is powered-down. To enable ADC from a powered-down state, send any command to the ISL29002. 0C(hex) ADC is reset. A reset restarts the counter value to zero and returns the clock cycle to zero. 00(hex) Internal Timing Mode. Integration time is 110ms per photodiode. ...

Page 7

... See Table 3 for R When using one of the three internal timing modes, the ISL29002’s resolution is determined by the ratio of the max lux 2 C interface is the range to 32,768, the number of clock cycles per integration. ...

Page 8

... AC unwanted signal’s sum from 0ms to n*16.66ms (n = 1,2... zero. Similarly, setting the i ISL29002’s integration time to an integer multiple of periodic noise signal greatly improves the light sensor output signal in the presence of noise. The integration time, T ISL29002 is set by an external resistor R ...

Page 9

... A2 REXT A1 100k A0 FIGURE 12. TYPICAL CIRCUIT Layout Considerations The ISL29002 is relatively insensitive to layout. Like other devices intended to provide excellent performance even in significantly noisy environments. There are only a few considerations that will ensure best performance. Route the supply and I sources of noise. Use two power-supply decoupling capacitors, 4.7µ ...

Page 10

... 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 www.intersil.com 10 ISL29002 MDP0052 0. ...

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