ISL29015 Intersil Corporation, ISL29015 Datasheet

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ISL29015

Manufacturer Part Number
ISL29015
Description
Integrated Digital Ambient Light Sensor and Proximity Sensor
Manufacturer
Intersil Corporation
Datasheet

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Integrated Digital Ambient Light Sensor
and Proximity Sensor
The ISL29015 is an integrated ambient and infrared light to
digital converter with a built-in IR LED driver and I
interface. This device provides not only ambient light sensing
to allow robust backlight/display brightness control but also
infrared sensing to allow proximity estimation.
For ambient light sensing, an internal 16-bit ADC has been
designed based on the charge-balancing A/D conversion
technique. The ADC conversion time is nominally 100ms
and is user adjustable from 25µs to 100ms depends on
oscillator frequency and ADC resolution. This ADC is
capable of rejecting 50Hz and 60Hz flicker noise caused by
artificial light sources. The lux-range-select feature allows
users to program the lux range for optimized counts/lux.
For proximity sensing, the ADC is used to digitize the output
signal from the photodiode array when the internal IR LED
driver is turned on and off for the programmed time periods
under user-selected modulation frequency to drive the
external IR LED. As this proximity sensor employs a noise
cancellation scheme to highly reject unwanted IR noise, the
digital output of proximity sensing decreases with distance.
The driver output current is user selectable up to 100mA to
drive different types of IR emitters LEDs.
Six different modes of operation can be selected via the I
interface: Programmable ALS once with auto power-down,
programmable IR sensing once, programmable proximity
sensing once, programmable continuous ALS sensing,
programmable continuous IR sensing and programmable
continuous proximity sensing. The programmable one-time
operation modes greatly reduce power because an
immediate automatic shutdown reduces overall supply
current less than 1µA.
Designed to operate on supplies from 2.25V to 3.3V, the
ISL29015 is specified for operation over the -40°C to +85°C
ambient temperature range. It is packaged in a clear, Pb-free
6 Ld ODFN package.
Pinout
www.DataSheet4U.com
*EXPOSED PAD CAN BE CONNECTED TO GND OR
ELECTRICALLY ISOLATED
REXT
GND
VDD
1
2
3
(6 LD ODFN)
TOP VIEW
ISL29015
®
1
Data Sheet
6
5
4
IRDR
SDA
SCL
2
C/SMBus
1-888-INTERSIL or 1-888-468-3774
2
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
C
Features
Proximity Sensing
• Ambient IR Cancellation During Proximity Sensing
• IR LED Driver with Programmable Source Current
• Programmable LED current Modulation Frequency
• Variable Conversion Resolution up to 16-bits
Ambient Light Sensing
• Simple Output Code Directly Proportional to lux
• Adjustable Sensitivity up to 65 Counts per lux
• Selectable Range (via I
• Integrated 50/60Hz Noise Rejection
• Works Under Various Light Sources, Including Sunlight
Ideal Spectral Response for Light and Proximity Sensor
• Light Sensor Close to Human Eye Response
• Proximity sensor range from 850nm to 950nm
Ultra Low Power
• 90μA Max Operating Current
• Software Shutdown and Automatic Shutdown
Easy to Use
• I
• No Complex Algorithms Needed
• Temperature Compensated
• Small Form Factor
Additional Features
• I
• 1.7V to 3.63V Supply for I
• 2.25V to 3.3V Supply
• Pb-Free (RoHS compliant)
Applications
• Display and Keypad Dimming Adjustment and Proximity
• Industrial and Medical Light and Proximity Sensing
- Works Under Direct Sunlight
- Adjustable Current Drive from 100mA to 12.5mA
- Range 1 = 0.015 lux to 1,000 lux
- Range 2 = 0.06 lux to 4,000 lux
- Range 3 = 0.24 lux to 16,000 lux
- Range 4 = 0.96 lux to 64,000 lux
- Excellent Light Sensor IR and UV Rejection
- Can use either 850nm or 950nm LED solution
- 1.0μA Max Shutdown Current
- 2.0x2.1x0.7mm 6 Ld ODFN Package
Sensing for:
- Mobile Devices: Smart Phone, PDA, GPS
- Computing Devices: Notebook PC, Webpad
- Consumer Devices: LCD-TV, Digital Picture Frame, Digital
2
2
C (SMBus Compatible) Output
C and SMBus Compatible
Camera
October 31, 2008
All other trademarks mentioned are the property of their respective owners.
|
Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2008. All Rights Reserved.
2
C)
2
C Interface
ISL29015
FN6522.0

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ISL29015 Summary of contents

Page 1

... Data Sheet www.DataSheet4U.com Integrated Digital Ambient Light Sensor and Proximity Sensor The ISL29015 is an integrated ambient and infrared light to digital converter with a built-in IR LED driver and I interface. This device provides not only ambient light sensing to allow robust backlight/display brightness control but also infrared sensing to allow proximity estimation ...

Page 2

... Evaluation Board serial clock line The I C bus lines can be pulled from 1.7V to above serial data line 2 C. VDD 1 INTEGRATION ADC IREF FOSC 2 GND ISL29015 PACKAGE (Pb-Free ODFN L6.2x2.1 DESCRIPTION DD COMMAND REGISTER DATA REGISTER SDA SCL IRDR ...

Page 3

... Pin REF EXT V SCL and SDA Input Low Voltage IL V SCL and SDA Input High Voltage IH 3 ISL29015 = +25°C) Thermal Information Thermal Resistance (Typical, Note ODFN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Maximum Die Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . +90°C + 0.5V Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . .-40°C to +100° 0.5V Operating Temperature . . . . . . . . . . . . . . . . . . . . . . .-40°C to +85°C DD Pb-Free Reflow Profile ...

Page 4

... The ISL29015 initial operation is at the power-down mode after C a supply voltage is provided. The data registers contain the default value of 0. When the ISL29015 receives an I command one-time measurement from an I will start ADC conversion with light or proximity sensing. It will ...

Page 5

... ISL29015 Interface There are four 8-bit registers available inside the ISL29015. The two command registers define the operation of the device. The command registers do not change until the registers are overwritten. The two 8-bit data Read Only registers are for the ADC output ...

Page 6

... SDA OUT SDA DRIVEN BY MASTER CLK Register Set There are four registers that are available in the ISL29015. Table 1 summarizes their functions. ADDR REG NAME 7 00h COMMANDI OP2 01h COMMANDII IS1 02h DATA D7 LSB ...

Page 7

... ADC Output in IR Sensing The ISL29015’s ADC output codes, DATA, are directly proportional to the IR intensity received in the IR sensing (EQ. 2) phase. is the max × ...

Page 8

... Route the supply and I sources of noise. Use two power-supply decoupling capacitors, 1µF and 0.1µF, placed close to the device. Typical Circuit A typical application for the ISL29015 is shown in Figure 4. The ISL29015’s I 1000100. The device can be tied onto a system’s I together with other I Soldering Considerations Convection heating is recommended for reflow soldering ...

Page 9

... SDA C1 C2 1µF 0.1µF 3 REXT SCL ISL29015 REXT 499kΩ 9 ISL29015 30ms 50µA 1mA 50mA R2 R1 10kΩ 10kΩ SLAVE_1 6 SDA 5 SCL 4 FIGURE 4. ISL29015 TYPICAL CIRCUIT 1.7V TO 3.63V MASTER MICROCONTROLLER SDA SCL SLAVE_n SDA SCL October 31, 2008 FN6522.0 ...

Page 10

... RELATIVE SENSITIVITY FIGURE 7. RADIATION PATTERN 10000 92% BRIGHTNESS PAPER 1000 18% GRAY CARD 100 10 ESD BLACK FOAM DISTANCE (mm) FIGURE 9. ADC OUTPUT vs DISTANCE WITH DIFFERENT OBJECTS IN PROXIMITY SENSING 10 ISL29015 499kΩ DD ext 1.2 INCANDESCENT 0.8 HALOGEN 0.6 0.4 FLUORESCENT 0.2 -0.2 900 1000 1100 FIGURE 6. SPECTRAL RESPONSE FOR AMBIENT LIGHT ...

Page 11

... IS<1:0> 104.0 103.5 103.0 102.5 102.0 101.5 101.0 100.5 100.0 -40 - TEMPERATURE (°C) FIGURE 13. OUTPUT CURRENT vs TEMPERATURE IN PROXIMITY SENSING 11 ISL29015 499kΩ (Continued) DD ext 60 100 60 80 100 120 FIGURE 14. SUPPLY CURRENT vs TEMPERATURE IN ALS 1.10 300 Lux FLUORESCENT LIGHT ALS SENSING 1.05 1.00 0.95 ...

Page 12

... 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 12 ISL29015 FIGURE 15 ODFN SENSOR LOCATION OUTLINE FN6522.0 October 31, 2008 ...

Page 13

... LEAD OPTICAL DUAL FLAT NO-LEAD PLASTIC PACKAGE (ODFN) Rev 0, 9/06 2.10 6 PIN 1 INDEX AREA (4X) 0.10 TOP VIEW (0. 65) (0. 65) (1. 95) TYPICAL RECOMMENDED LAND PATTERN 13 ISL29015 ± (1. 35) (6X 0. 30) (6X 0. 55) NOTES: 1. Dimensions are in millimeters. Dimensions in () for Reference Only. 2. Dimensioning and tolerancing conform to AMSE Y14.5m-1994. ...

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