isl29029 Intersil Corporation, isl29029 Datasheet

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isl29029

Manufacturer Part Number
isl29029
Description
Low Power Ambient Light And Proximity Sensor With Intelligent Interrupt And Sleep Modes
Manufacturer
Intersil Corporation
Datasheet

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Part Number:
isl29029IROZ-T7
Manufacturer:
INTERSIL
Quantity:
20 000
Low Power Ambient Light and Proximity Sensor with
Intelligent Interrupt and Sleep Modes
ISL29029
The ISL29029 is an integrated ambient and infrared light-to-digital
converter with a built-in IR LED driver and I
Compatible). This device uses two independent ADCs for
concurrently measuring ambient light and proximity in parallel.
The flexible interrupt scheme is designed for minimal
microcontroller utilization.
For ambient light sensor (ALS) data conversions, an ADC converts
photodiode current (with a light sensitivity range up to 2000 Lux)
in 100ms per sample. The ADC rejects 50Hz/60Hz flicker noise
caused by artificial light sources.
For proximity sensor (PROX) data conversions, the built-in driver
turns on an external infrared LED and the proximity sensor ADC
converts the reflected IR intensity to digital. This ADC rejects
ambient IR noise (such as sunlight) and has a 540μs conversion
time.
The ISL29029 provides low power operation of ALS and PROX
sensing with a typical 138μA normal operation current (110μA for
sensors and internal circuitry, ~28μA for external LED) with 220mA
current pulses for a net 100μs, repeating every 800ms (or under).
The ISL29029 uses both a hardware pin and software bits to
indicate an interrupt event has occurred. An ALS or PROX
interrupt is defined as a measurement which is outside a set
window. The user may also require that both ALS/PROX
interrupts occur at once, up to 16 times in a row before activating
the interrupt pin.
The ISL29029 is designed to operate from 2.25V to 3.63V over the
-40°C to +85°C ambient temperature range. It is packaged in a
clear, lead-free 8 lead ODFN package.
Applications
• Display and Keypad Dimming Adjustment and Proximity Sensing
• Industrial and Medical Light and Proximity Sensing
November 23, 2010
FN7682.0
for:
- Mobile Devices: Smart Phone, PDA, GPS
- Computing Devices: Laptop PC, Netbook
- Consumer Devices: LCD-TV, Digital Picture Frame, Digital
Camera
1
2
C Interface (SMBus
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 trademark owned by Intersil Corporation or one of its subsidiaries.
Features
• Works Under All Light Sources Including Sunlight
• Dual ADCs Measure ALS/Prox Concurrently
• Intelligent Interrupt Scheme Simplifies μC Code
• 0.5% Typical Nonlinearity
Ambient Light Sensing
• Simple Output Code Directly Proportional to lux
• 50Hz/60Hz Flicker Noise and IR Rejection
• Light Sensor Close to Human Eye Response
• Selectable 125/2000 Lux Range
Proximity Sensing
• Proximity Sensor with Broad IR Spectrum
• IR LED Driver with I
• Ambient IR Noise Cancellation (Including Sunlight)
Intelligent and Flexible Interrupts
• Independent ALS/PROX Interrupt Thresholds
• Adjustable Interrupt Persistency
Ultra Low Power
• 138μA DC Typical Supply Current for ALS/Prox Sensing
• <1.0μA Supply Current When Powered Down
Easy to Use
• Set Registers; Wait for Interrupt
• I
• Temperature Compensated
• Tiny ODFN8 2.0x2.1x0.7 (mm) Package
Additional Features
• 1.7V to 3.63V Supply for I
• 2.25V to 3.63V Sensor Power Supply
• Pb-Free (RoHS compliant)
• I
- Can Use 850nm and 950nm External IR LEDs
- Net 100μs Pulse with 110mA or 220mA Amplitudes
- Periodic Sleep Time up to 800ms Between Pulses
- 1/4/8/16 Consecutive Triggers Required Before Interrupt
- 110μA for Sensors and Internal Circuitry
- 28μA Typical Current for External IR LED (Assuming 220mA
2
2
C (SMBus Compatible) Output
C Address Selection Pin
for 100μs Every 800ms)
All other trademarks mentioned are the property of their respective owners.
|
2
Copyright Intersil Americas Inc. 2010. All Rights Reserved
C Programmable Sink Currents
2
C Interface

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isl29029 Summary of contents

Page 1

... The user may also require that both ALS/PROX interrupts occur at once times in a row before activating the interrupt pin. The ISL29029 is designed to operate from 2.25V to 3.63V over the -40°C to +85°C ambient temperature range packaged in a clear, lead-free 8 lead ODFN package. ...

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 ISL29029. For more information on MSL please see techbrief TB363. 2 ...

Page 3

... DATA Prox Measurement Result PROX_1 t Rise Time for IRDR Sink Current r t Fall time for IRDR Sink Current f 3 ISL29029 Thermal Information (T = +25 C) ° A Thermal Resistance (Typical ODFN Package (Notes Maximum Die Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +90°C Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40°C to +100°C Operating Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40° ...

Page 4

... LOW Period of the SCL clock LOW t HIGH period of the SCL Clock HIGH t Set-up Time for a Repeated START Condition SU:STA t Data Hold Time HD:DAT 4 ISL29029 Ω = 3.0V +25° 499k 1% tolerance. (Continued EXT PROX_DR = 0; V PROX_DR = 1; V PROX_EN = 0; V Register bit PROX_DR = 0 ...

Page 5

... Noise Margin at the HIGH Level nH NOTES: 2 12. All parameters Electrical Specifications table are guaranteed by design and simulation. 13 the capacitance of the bus in pF ISL29029 For SCL and SDA unless otherwise noted, (Note 12). (Continued) CONDITION (Note 13) (Note 13) Maximum is determined FIGURE TIMING DIAGRAM Ω ...

Page 6

... RW 0x00 (ALS Range) ALSIR_MODE 0 RW 0x00 (ALSIR Mode) 6 ISL29029 2 C. Registers 0x1 and 0x2 define the operation mode of the device. Registers 0x3 through 0x7 TABLE 1. ISL29029 REGISTERS AND REGISTER BITS BIT (Reserved) PROX_SLP[2:0] PROX_DR PROX_PRST[1:0] (Write 0) ALS_FLAG PROX_LT[7:0] ...

Page 7

... DEFAULT 7:0 RW 0xFF 7 ISL29029 When = 0, no Prox interrupt event has occurred since power-on or last “clear” When = 1, a Prox interrupt event occurred. Clearable by writing “0” Writing “1” leaves previous state unchanged For bits 6:5 = (see the following) 00; set PROX_FLAG if 1 conversion result trips the threshold value 01 ...

Page 8

... For more information about the I Philips™ I Photodiodes and ADCs The ISL29029 contains two photodiode arrays which convert photons (light) into current. The ALS photodiodes are constructed to mimic the human eye’s wavelength response curve to visible light 2 C bus master (see Figure 6). The ALS photodiodes’ ...

Page 9

... When proximity sensing is enabled, the IRDR pin will drive a user-supplied infrared LED, the emitted IR reflects off an object (i.e., a human head) back into the ISL29029, and a sensor converts the reflected IR wave to a current signal in 0.54ms. The ADC subtracts the IR reading before and after the LED is driven (to remove ambient IR such as sunlight), and converts this value to a digital count stored in Register 0x8 ...

Page 10

... Power-Down To put the ISL29029 into a power-down state, the user can set both PROX_EN and ALS_EN bits Register 1. Or more simply, set all of Register 1 to 0x00. Calculating Lux The ISL29029’ ...

Page 11

... ISL29029 499kΩ 11 ISL29029 Layout Considerations The ISL29029 is relatively insensitive to layout. Like other I 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 noise. A 0.1µF and 1µF power supply decoupling capacitors need to be placed close to the device ...

Page 12

... REFLECTOR (USING ISL29028 EVALUATION BOARD) 12 ISL29029 V = 3.0V 499k DD EXT 1.0 FLUORESCENT 0.9 0.8 0.7 0.6 HALOGEN INCAND. 0.5 0.4 0.3 0.2 0.1 0.0 750 950 FIGURE 7. ISL29029 SENSITIVITY TO DIFFERENT WAVELENGTHS 2500 2000 1500 1000 500 FIGURE 9. ALS LINEARITY OVER 3 LIGHT SOURCES (2000 LUX 160 140 120 100 120 140 160 180 200 FIGURE 11. V Ω ...

Page 13

... V (V) IRDR FIGURE 12. IRDR PULSE AMPLITUDE vs V FIGURE 14. STABILITY OF ALS COUNT OVER-TEMPERATURE (AT 0.00 LUX) 13 ISL29029 V = 3.0V 499k DD EXT -10 -20 -30 -40 3.0 3.5 4.0 4.5 5.0 -50 FIGURE 13. STABILITY OF ALS COUNT OVER TEMP (AT 300 LUX) ...

Page 14

... FIGURE 15 ODFN SENSOR LOCATION OUTLINE - DIMENSIONS ISL29029 2.10 0. 0.50 5 FN7682.0 November 23, 2010 ...

Page 15

... 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 15 ISL29029 www.intersil.com/askourstaff For additional products, see www.intersil.com/product_tree www ...

Page 16

... L8.2.1x2.0 8 LEAD OPTICAL DUAL FLAT NO-LEAD PLASTIC PACKAGE (ODFN) Rev 1, 12/09 2.10 6 PIN 1 INDEX AREA (2X) 0.10 TOP VIEW 2.50 2.10 (6x0.50) (8x0.20) (8x0.55) (0.75) TYPICAL RECOMMENDED LAND PATTERN 16 ISL29029 A B 0.50 2.00 1. ± 0.75 BOTTOM VIEW 0.70±0.05 SIDE VIEW (1.50 REF C (8x0.20) DETAIL "X" NOTES: 1. Dimensions are in millimeters. ...

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