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ISL29023
Data Sheet March 3, 2009 FN6691.0
Integrated Digital Ambient Light Sensor with Interrupt Function
The ISL29023 is an integrated ambient and infrared light to digital converter with I2C (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 11s to 90ms, depending on oscillator frequency and ADC resolution. In normal operation, typical current consumption is 70A. 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 I2C interface. The power consumption can be reduced to less than 0.3A when powered down. The ISL29023 supports a software and hardware interrupt that remains asserted until the host clears it through I2C 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 I2C supply from 1.7V to 3.63V, the ISL29023 is specified for operation over the -40C to +85C ambient temperature range.
Features
Ambient Light Sensing * Simple Output Code Directly Proportional to lux * Variable Conversion Resolution up to 16-bits * Adjustable Sensitivity up to 65 Counts per lux * Selectable Range (via I2C) - 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 * Integrated 50/60Hz Noise Rejection * Temperature Compensated * Works Under Various Light Sources, Including Sunlight Excellent Spectral Response * Light Sensor Close to Human Eye Response - Excellent Light Sensor IR and UV Rejection Ultra Low Power * 85A Max Operating Current * Software Shutdown and Automatic Shutdown - 0.3A Max Shutdown Current Additional Features * I2C and SMBus Compatible * 1.7V to 3.63V Supply for I2C Interface * 2.25V to 3.63V Sensor Power Supply * Small Form Factor - 6 Ld 2.0x2.1x0.7mm ODFN Package * Pb-Free (RoHS compliant)
Pinout
ISL29023 (6 LD ODFN) TOP VIEW
VDD 1 GND 2 REXT 3 6 SDA 5 SCL 4 INT
Applications
* Display and Keypad Dimming Adjustment for: - Mobile Devices: Smart Phone, PDA, GPS - Computing Devices: Notebook PC, Webpad - Consumer devices: LCD-TV, Digital Picture Frame, Digital Camera * Industrial and Medical Light Sensing
*EXPOSED PAD CAN BE CONNECTED TO GND OR ELECTRICALLY ISOLATED
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CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright (c) Intersil Americas Inc. 2009. All Rights Reserved. All other trademarks mentioned are the property of their respective owners.
ISL29023 Ordering Information
PART NUMBER (Note) ISL29023IROZ-T7* ISL29023IROZ-EVALZ *Please refer to TB347 for details on reel specifications. NOTE: These Intersil Pb-free plastic packaged products employ special Pb-free material sets; molding compounds/die attach materials and NiPdAu plate - e4 termination finish, which is 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. TEMP. RANGE (C) -40 to +85 Evaluation Board (Pb-free) PACKAGE (Pb-Free) 6 Ld ODFN L6.2x2.1 PKG. DWG. #
Pin Descriptions
PIN NUMBER 1 2 3 4 5 6 PIN NAME VDD GND REXT INT SCL SDA Ground pin. External resistor pin for ADC reference; connect this pin to ground through a (nominal) 499k resistor. Interrupt pin; low for interrupt alarming. INT pin is open drain. INT remains asserted until the interrupt flag status bit is reset. I2C serial clock I2C serial data Exposed pad connected to ground or electrically isolated. The I2C bus lines can be pulled from 1.7V to above VDD, 3.63V max. DESCRIPTION Positive supply; connect this pin to a 2.25V to 3.63V supply.
Block Diagram
VDD 1
PHOTODIODE ARRAY
COMMAND REGISTER INTEGRATION ADC DATA REGISTER I2C/SMBus IREF fOSC INTERRUPT REGISTER 5 SCL 6 SDA
LIGHT DATA PROCESS
3 REXT
2 GND ISL29023
4 INT
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ISL29023
Absolute Maximum Ratings (TA = +25C)
VDD Supply Voltage between VDD and GND . . . . . . . . . . . . . 4.0V I2C Bus (SCL, SDA) and INT Pin Voltage . . . . . . . . . . -0.2V to 4.0V I2C Bus (SCL, SDA) and INT Pin Current . . . . . . . . . . . . . . . <10mA REXT Pin Voltage . . . . . . . . . . . . . . . . . . . . . . . . -0.2V to VDD+0.5V
Thermal Information
Thermal Resistance (Typical, Note 1) JA (C/W) 6 Ld ODFN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90 Maximum Die Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . +90C Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . .-40C to +100C Operating Temperature . . . . . . . . . . . . . . . . . . . . . . .-40C to +85C Pb-Free Reflow Profile. . . . . . . . . . . . . . . . . . . . . . . . .see link below http://www.intersil.com/pbfree/Pb-FreeReflow.asp
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product reliability and result in failures not covered by warranty.
NOTE: 1. JA is measured in free air with the component mounted on a high effective thermal conductivity test board with "direct attach" features. See Tech Brief TB379.
IMPORTANT NOTE: All parameters having Min/Max specifications are guaranteed. Typical values are for information purposes only. Unless otherwise noted, all tests are at the specified temperature and are pulsed tests, therefore: TJ = TC = TA
Electrical Specifications
PARAMETER VDD IDD IDD1 VI2C fOSC tint FI2C DATA_0 DATA_F DATA DATA DATA_1 DATA_2 DATA_3 DATA_4 DATA_IR1 DATA_IR2 DATA_IR3 DATA_IR4 VREF VIL VIH ISDA IINT NOTES:
VDD = 3V, TA = +25C, REXT = 499k 1% tolerance, 16-bit ADC operation, unless otherwise specified. CONDITION MIN 2.25 70 Software disabled or auto power-down 1.7 675 16-bit ADC data E = 0 lux, Range 1 (1k lux) Ambient light sensing 750 90 1 to 400 1 10 5 0.01 TYP MAX 3.63 85 0.3 3.63 825 UNIT V A A V kHz ms kHz Counts % 65535 Counts
DESCRIPTION Power Supply Range Supply Current Supply Current when Powered Down Supply Voltage Range for I2C Interface Internal Oscillator Frequency ADC Integration/Conversion Time I2C Clock Rate Range Count Output When Dark Full Scale ADC Code Count Output Variation Over Three Light Sources: Fluorescent, Incandescent and Sunlight Light Count Output With LSB of 0.015 lux/count Light Count Output With LSB of 0.06 lux/count Light Count Output With LSB of 0.24 lux/count Light Count Output With LSB of 0.96 lux/count Infrared Count Output Infrared Count Output Infrared Count Output Infrared Count Output Voltage of REXT Pin SCL and SDA Input Low Voltage SCL and SDA Input High Voltage SDA Current Sinking Capability INT Current Sinking Capability
E = 300 lux, Fluorescent light (Note 2), Ambient light sensing, Range 1 (1k lux) E = 300 lux, Fluorescent light (Note 2), Ambient light sensing, Range 2 (4k lux) E = 300 lux, Fluorescent light (Note 2), Ambient light sensing, Range 3 (16k lux) E = 300 lux, Fluorescent light (Note 2), Ambient light sensing, Range 4 (64k lux) E = 210 lux, Sunlight (Note 3), IR sensing, Range 1 E = 210 lux, Sunlight (Note 3), IR sensing, Range 2 E = 210 lux, Sunlight (Note 3), IR sensing, Range 3 E = 210 lux, Sunlight (Note 3), IR sensing, Range 4
15000
20000 5000 1250 312
25000 Counts Counts Counts Counts 25000
15000
20000 5000 1250 312 0.52
V 0.55 V V mA mA
1.25 4 4 5 5
2. 550nm green LED is used in production test. The 550nm LED irradiance is calibrated to produce the same DATA count against an illuminance level of 300 lux fluorescent light. 3. 850nm IR LED is used in production test. The 850nm LED irradiance is calibrated to produce the same DATA_IR count against an illuminance level of 210 lux sunlight at sea level.
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ISL29023 Principles of Operation
Photodiodes and ADC
The ISL29023 contains two photodiode arrays which convert light into current. The spectral response for ambient light sensing and IR sensing is shown in Figure 5 in the performance curves section. After light is converted to current during the light signal process, the current output is converted to digital by a built-in 16-bit Analog-to-Digital Converter (ADC). An I2C command reads the ambient light or IR intensity in counts. The converter is a charge-balancing integrating type 16-bit ADC. The chosen method for conversion is best for converting small current signals in the presence of an AC periodic noise. A 100ms integration time, for instance, highly rejects 50Hz and 60Hz power line noise simultaneously. See "Integration and Conversion Time" on page 7. The built-in ADC offers user flexibility in integration time or conversion time. There are two timing modes: Internal Timing Mode and External Timing Mode. In Internal Timing Mode, integration time is determined by an internal oscillator (fOSC), and the n-bit (n = 4, 8, 12, 16) counter inside the ADC. In External Timing Mode, integration time is determined by the time between two consecutive I2C External Timing Mode commands. A good balancing act of integration time and resolution (depending on the application) is required for optimal results. The ADC has I2C programmable range select to dynamically accommodate various lighting conditions. For very dim conditions, the ADC can be configured at its lowest range (Range 1) in the ambient light sensing. When the part is programmed for ambient light sensing, the ambient light with wavelength within the "Ambient Light Sensing" spectral response curve in Figure 5 is converted into current. With ADC, the current is converted to an unsigned n-bit (up to 16 bits) digital output. When the part is programmed for infrared (IR) sensing, the IR light with wavelength within the "IR Sensing" spectral response curve in Figure 5 is converted into current. With ADC, the current is converted to an unsigned n-bit (up to 16-bits) digital output.
Interrupt Function
The active low interrupt pin is an open drain pull-down configuration. The interrupt pin serves as an alarm or monitoring function to determine whether the ambient light level exceeds the upper threshold or goes below the lower threshold. It should be noted that the function of ADC conversion continues without stopping after interrupt is asserted. If the user needs to read the ADC count that triggers the interrupt, the reading should be done before the data registers are refreshed by the following conversions. The user can also configure the persistency of the interrupt pin. This reduces the possibility of false triggers, such as noise or sudden spikes in ambient light conditions. An unexpected camera flash, for example, can be ignored by setting the persistency to 8 integration cycles.
I2C Interface
There are eight 8-bit registers available inside the ISL29023. 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. The data registers contain the ADC's latest digital output, or the number of clock cycles in the previous integration period. The ISL29023's I2C interface slave address is internally hardwired as 1000100. When 1000100x with x as R or W is sent after the Start condition, this device compares the first 7 bits of this byte to its address and matches. Figure 1 shows a sample one-byte read. Figure 2 shows a sample one-byte write. The I2C bus master always drives the SCL (clock) line, while either the master or the slave can drive the SDA (data) line. Figure 2 shows a sample write. Every I2C transaction begins with the master asserting a start condition (SDA falling while SCL remains high). The following byte is driven by the master, and includes the slave address and read/write bit. The receiving device is responsible for pulling SDA low during the acknowledgement period. Every I2C transaction ends with the master asserting a stop condition (SDA rising while SCL remains high). For more information about the I2C standard, please consult the PhilipsTM I2C specification documents.
Low-Power Operation
The ISL29023 initial operation is at the power-down mode after a supply voltage is provided. The data registers contain the default value of 0. When the ISL29023 receives an I2C command to do a one-time measurement from an I2C master, it will start ADC conversion with light sensing. It will go to the power-down mode automatically after one conversion is finished and keep the conversion data available for the master to fetch anytime afterwards. The ISL29023 will continuously do ADC conversion with light sensing if it receives an I2C command of continuous measurement. It will continuously update the data registers with the latest conversion data. It will go to the power-down mode after it receives the I2C command of power-down.
Ambient Light and IR Sensing
There are four operational modes in ISL29023: Programmable ALS once with auto power-down, programmable IR sensing once with auto power-down, programmable continuous ALS sensing and programmable continuous IR sensing. These four modes can be programmed in series to fulfill the application needs. The detailed program configuration is listed in "Command Register I 00(hex)" on page 5.
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ISL29023
I2C DATA I2C SDA IN I2C SDA OUT SDA DRIVEN BY MASTER A SDA DRIVEN BY MASTER A SDA DRIVEN BY MASTER A D7 D6 D5 D4 D3 D2 D1 D0 START DEVICE ADDRESS WA REGISTER ADDRESS STOP START DEVICE ADDRESS A DATA BYTE0
A6 A5 A4 A3 A2 A1 A0 W A R7 R6 R5 R4 R3 R2 R1 R0 A
A6 A5 A4 A3 A2 A1 A0 W
A
SDA DRIVEN BY ISL29023
I2C CLK 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9
FIGURE 1. I2C READ TIMING DIAGRAM SAMPLE
I2C DATA I2C SDA IN
START
DEVICE ADDRESS
W
A
REGISTER ADDRESS
A
FUNCTIONS
A
STOP
A6 A5 A4 A3 A2 A1 A0 I2C SDA OUT SDA DRIVEN BY MASTER I2C CLK IN 1 2 3 4 5 6 7
W
A
R7 R6 R5 R4 R3 R2 R1 R0
A
B7 B6 B5 B4 B3 B2 B1 B0
A
A
SDA DRIVEN BY MASTER
A
SDA DRIVEN BY MASTER
A
8
9
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
FIGURE 2. I2C WRITE TIMING DIAGRAM SAMPLE
Register Set
There are eight registers that are available in the ISL29023. Table 1 summarizes their functions.
TABLE 1. REGISTER SET BIT ADDR 00h 01h 02h 03h 04h 05h 06h 07h REG NAME COMMANDI COMMANDII DATALSB DATAMSB INT_LT_LSB INT_LT_MSB INT_HT_LSB INT_HT_MSB 7 OP2 0 D7 D15 TL7 TL15 TH7 TH15 6 OP1 0 D6 D14 TL6 TL14 TH6 TH14 5 OP0 0 D5 D13 TL5 TL13 TH5 TH13 4 0 0 D4 D12 TL4 TL12 TH4 TH12 3 0 RES1 D3 D11 TL3 TL11 TH3 TH11 2 FLAG RES0 D2 D10 TL2 TL10 TH2 TH10 1 PRST1 RANGE1 D1 D9 TL1 TL9 TH1 TH9 0 PRST0 RANGE0 D0 D8 TL0 TL8 TH0 TH8 DEFAULT 00h 00h 00h 00h 00h 00h FFh FFh
Command Register I 00(hex)
The first command register has the following functions: 1. Operation Mode: Bits 7, 6, and 5. These three bits determine the operation mode of the device.
BITS 7 TO 5 000 001 010 100 101 110 111
TABLE 2. OPERATION MODE OPERATION Power-down the device ALS once IR once Reserved (Do not use) ALS continuous IR continuous Reserved (Do not use)
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ISL29023
2. Interrupt flag; Bit 2. This is the status bit of the interrupt. The bit is set to logic high when the interrupt thresholds have been triggered (out of threshold window), and logic low when not yet triggered. Once activated and the interrupt is triggered, the INT pin goes low and the interrupt status bit goes high until the status bit is polled through the I2C read command. Both the INT output and the interrupt status bit are automatically cleared at the end of the 8-bit (00h) command register transfer.
TABLE 3. INTERRUPT FLAG BIT 2 0 1 OPERATION Interrupt is cleared or not triggered yet Interrupt is triggered ADDRESS (hex) 02 03
Data Registers (02 hex and 03 hex)
The device has two 8-bit read-only registers to hold the data from LSB to MSB for ADC. The most significant bit (MSB) is accessed at 03 hex, and the least significant bit (LSB) is accessed at 02 hex. For 16-bit resolution, the data is from D0 to D15; for 12-bit resolution, the data is from D0 to D11; for 8-bit resolution, the data is from D0 to D7. The registers are refreshed after every conversion cycle.
TABLE 7. DATA REGISTERS CONTENTS D0 is LSB for 4, 8, 12 or 16-bit resolution; D3 is MSB for 4-bit resolution; D7 is MSB for 8-bit resolution D15 is MSB for 16-bit resolution; D11 is MSB for 12-bit resolution
3. Interrupt persist; Bits 1 and 0. The interrupt pin and the interrupt flag are triggered/set when the data sensor reading is out of the interrupt threshold window after m consecutive number of integration cycles. The interrupt persist bits determine m.
TABLE 4. INTERRUPT PERSIST BIT 1:0 00 01 10 11 NUMBER OF INTEGRATION CYCLES 1 4 8 16
Interrupt Registers (04, 05, 06 and 07 hex)
Registers 04 and 05 hex set the low (LO) threshold for the interrupt pin and the interrupt flag. 04 hex is the LSB and 05 hex is the MSB. By default, the Interrupt threshold LO is 00 hex for both LSB and MSB. Registers 06 and 07 hex set the high (HI) threshold for the interrupt pin and the interrupt flag. 06 hex is the LSB and 07 hex is the MSB. By default, the Interrupt threshold HI is FF hex for both LSB and MSB.
Command Register II 01(hex)
The second command register has the following functions: 1. Resolution: Bits 3 and 2. Bits 3 and 2 determine the ADC's resolution and the number of clock cycles per conversion. Changing the number of clock cycles does more than just change the resolution of the device; it also changes the integration time, which is the period the device's analog-todigital (A/D) converter samples the photodiode current signal for a measurement.
.
Calculating Lux
The ISL29023's ADC output codes, DATA, are directly proportional to lux in the ambient light sensing.
E cal = x DATA (EQ. 1)
TABLE 5. ADC RESOLUTION DATA WIDTH BITS 3:2 00 01 10 11 NUMBER OF CLOCK CYCLES 216 = 65,536 212 = 4,096 28 = 256 24 = 16 n-BIT ADC 16 12 8 4
Here, Ecal is the calculated lux reading. The constant is determined by the Full Scale Range and the ADC's maximum output counts. The constant is independent of the light sources (fluorescent, incandescent and sunlight) because the light sources' IR component is removed during the light signal process. The constant can also be viewed as the sensitivity (the smallest lux measurement the device can measure).
Range ( k ) = ---------------------------Count max (EQ. 2)
2. Range: Bits 1 and 0. The Full Scale Range (FSR) can be adjusted via I2C using Bits 1 and 0. Table 6 lists the possible values of FSR for the 499k REXT resistor.
TABLE 6. RANGE/FSR LUX BITS 1:0 00 01 10 11 k 1 2 3 4 RANGE(k) Range1 Range2 Range3 Range4 FSR (LUX) @ ALS SENSING 1,000 4,000 16,000 64,000 FSR @ IR SENSING Refer to page 3 Refer to page 3 Refer to page 3 Refer to page 3
Here, Range(k) is defined in Table 6. Countmax is the maximum output counts from the ADC. The transfer function used for n-bits ADC becomes:
Range ( k ) E cal = --------------------------- x DATA n 2 (EQ. 3)
Here, n = 4, 8, 12 or 16. This is the number of ADC bits programmed in the command register. 2n represents the maximum number of counts possible from the ADC output. Data is the ADC output stored in the data registers (02 hex and 03 hex).
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ISL29023
Integration and Conversion Time
The ADC resolution and fOSC determine the integration time, tint.
(EQ. 4)
R EXT n n 1 t int = 2 x ------------- = 2 x --------------------------------------------725kHz x 499k f OSC
Here, EIR is the received IR intensity. The constant changes with the spectrum of background IR noise, such as sunlight and incandescent light. The also changes with the ADC's range and resolution selections.
Suggested PCB Footprint
It is important that the users check the "Surface Mount Assembly Guidelines for Optical Dual FlatPack No Lead (ODFN) Package" before starting ODFN product board mounting. http://www.intersil.com/data/tb/TB477.pdf
where n is the number of bits of resolution and n = 4, 8, 12 or 16. Therefore, 2n is the number of clock cycles. n can be programmed at the command register 01(hex) bits 3 and 2.
TABLE 8. INTEGRATION TIME OF n-BIT ADC REXT (k) 250 499** n = 16-BIT 45ms 90ms n = 12-BIT 2.8ms 5.6ms n = 8-BIT 176s 352s n = 4-BIT 11s 22s
Layout Considerations
The ISL29023 is relatively insensitive to layout. Like other I2C devices, it is 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 I2C traces as far as possible from all sources of noise. Use two power-supply decoupling capacitors, 1F and 0.1F, placed close to the device.
**Recommended REXT resistor value
External Scaling Resistor REXT for fOSC and Range
The ISL29023 uses an external resistor REXT to fix its internal oscillator frequency fOSC and the light sensing range, Range. fOSC and Range are inversely proportional to REXT. For user simplicity, the proportionality constant is referenced to 499k:
499k Range = ----------------- x Range ( k ) R EXT 499k f OSC = ----------------- x 725 kHz R EXT (EQ. 5)
Typical Circuit
A typical application for the ISL29023 is shown in Figure 3. The ISL29023's I2C address is internally hardwired as 1000100. The device can be tied onto a system's I2C bus together with other I2C compliant devices.
(EQ. 6)
Soldering Considerations
Convection heating is recommended for reflow soldering; direct-infrared heating is not recommended. The plastic ODFN package does not require a custom reflow soldering profile, and is qualified to +260C. A standard reflow soldering profile with a +260C maximum is recommended.
Noise Rejection
In general, integrating type ADC's have excellent noise-rejection characteristics for periodic noise sources whose frequency is an integer multiple of the conversion rate. For instance, a 60Hz AC unwanted signal's sum from 0ms to k*16.66ms (k = 1,2...ki) is zero. Similarly, setting the device's integration time to be an integer multiple of the periodic noise signal, greatly improves the light sensor output signal in the presence of noise.
ADC Output in IR Sensing
The ISL29023's ADC output codes, DATA, are directly proportional to the IR intensity received in the IR sensing.
DATA IR = x E IR (EQ. 7)
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FN6691.0 March 3, 2009
ISL29023
1.7V TO 3.63V R1 10k R2 10k R3 RES1 I2C MASTER MICROCONTROLLER SDA SCL INT
2.25V TO 3.63V
I2C SLAVE_0 1 2 C1 1F C2 0.1F 3 REXT 499k VDD GND REXT SDA SCL INT 6 5 4
I2C SLAVE_1 SDA SCL
I2C SLAVE_n SDA SCL
ISL29023
FIGURE 3. ISL29023 TYPICAL CIRCUIT
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ISL29023 Typical Performance Curves
1.2 NORMALIZED LIGHT INTENSITY 1.0 SUN 0.8 HALOGEN 0.6 0.4 0.2 0 300 INCANDESCENT FLUORESCENT NORMALIZED RESPONSE
(VDD = 3V, REXT = 499k)
1.2 HUMAN EYE 1.0 0.8 0.6 0.4 IR SENSING 0.2 0 AMBIENT LIGHT SENSING -0.2 300 400 500 600 700 800 900 WAVELENGTH (nm) 1000 1100
400
500
600
700
800
900
1000 1100
WAVELENGTH (nm)
FIGURE 4. NORMALIZED SPECTRAL RESPONSE OF LIGHT SOURCES
FIGURE 5. NORMALIZED SPECTRAL RESPONSE FOR AMBIENT LIGHT SENSING AND IR SENSING
CALCULATED ALS READING (LUX)
1000 900 800 700 600 500 400 300 200 100 0 0 Ecal = FLUORESCENT 1000 LUX 216 x DATA ALS SENSING RANGE 1 (1k Lux) 16-BIT ADC NO COVER GLASS INCANDESCENT
65535 ADC OUTPUT (COUNT)
RADIATION PATTERN 20 LUMINOSITY 30 ANGLE 40 50 60 70 80 90 0.2 0.4 0.6 0.8 RELATIVE SENSITIVITY 10 0 10 20 30 40 50 60 70 80 90 1.0
HALOGEN 32768
0 100 200 300 400 500 600 700 800 900 1000 LUX METER READING (LUX)
FIGURE 6. RADIATION PATTERN
FIGURE 7. SENSITIVITY TO THREE LIGHT SOURCES
10 OUTPUT CODE (COUNTS)
0 Lux NORMALIZED OUTPUT CODE
1.10 300 Lux FLUORESCENT LIGHT ALS SENSING RANGE 1 (1k Lux)
8
1.05
6
1.00
4
0.95
2
0 -60
-20
20 TEMPERATURE (C)
60
100
0.90 -60
-20
20 TEMPERATURE (C)
60
100
FIGURE 8. OUTPUT CODE FOR 0 LUX vs TEMPERATURE
FIGURE 9. OUTPUT CODE vs TEMPERATURE
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ISL29023 Typical Performance Curves
(VDD = 3V, REXT = 499k) (Continued)
90 85 80 75 70 65 60 -40 ALS SENSING 10,000 Lux
SUPPLY CURRENT (A)
-20
0
20 40 60 TEMPERATURE (C)
80
100
120
FIGURE 10. SUPPLY CURRENT vs TEMPERATURE IN ALS SENSING
1
6
SENSOR OFFSET
2
5
0.40 0.54
3
4
0.37
FIGURE 11. 6 LD ODFN SENSOR LOCATION OUTLINE
All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems. Intersil Corporation's quality certifications can be viewed at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. 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
FN6691.0 March 3, 2009
ISL29023
Package Outline Drawing
L6.2x2.1
6 LEAD OPTICAL DUAL FLAT NO-LEAD PLASTIC PACKAGE (ODFN) Rev 0, 9/06
2.10 A 6 B PIN 1 INDEX AREA
1
6 PIN 1 INDEX AREA 0.65 2.00
1 . 35
1 . 30 REF
(4X)
0.10
6X 0 . 30 0 . 05
0 . 65
TOP VIEW
6X 0 . 35 0 . 05
BOTTOM VIEW
0.10 M C A B
(0 . 65) MAX 0.75 SEE DETAIL "X" 0.10 C (0 . 65) (1 . 35) BASE PLANE ( 6X 0 . 30 ) SIDE VIEW SEATING PLANE 0.08 C C
( 6X 0 . 55 ) C (1 . 95) 0 . 00 MIN. 0 . 05 MAX. DETAIL "X" 0 . 2 REF 5
TYPICAL RECOMMENDED LAND PATTERN
NOTES: 1. Dimensions are in millimeters. Dimensions in ( ) for Reference Only. 2. Dimensioning and tolerancing conform to AMSE Y14.5m-1994. 3. Unless otherwise specified, tolerance : Decimal 0.05 4. Dimension b applies to the metallized terminal and is measured between 0.15mm and 0.30mm from the terminal tip. 5. Tiebar shown (if present) is a non-functional feature. 6. The configuration of the pin #1 identifier is optional, but must be located within the zone indicated. The pin #1 identifier may be either a mold or mark feature.
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