isl29030a Intersil Corporation, isl29030a Datasheet

isl29030a

Manufacturer Part Number

isl29030a

Description

Low Power Ambient Light And Proximity Sensor With Intelligent Interrupt And Sleep Modes - Analog And Digital Out

Manufacturer

Intersil Corporation

Datasheet

1.ISL29030A.pdf (16 pages)

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Low Power Ambient Light and Proximity Sensor with

Intelligent Interrupt and Sleep Modes - Analog and

Digital Out

ISL29030A

The ISL29030A is an integrated ambient and infrared

light-to-digital converter with a built-in IR LED driver and I

Interface (SMBus 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 of

2000 lux) in 100ms per sample. The ADC rejects 50Hz/60Hz

flicker noise caused by artificial light sources. The I

provides an analog output current proportional to the

measured light (420μA FSR).

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 ISL29030A provides low-power operation of the ALS and

proximity 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 ISL29030A uses both a hardware pin and software bits to

indicate an interrupt event has occurred. An ALS interrupt is

defined as a measurement that is outside a set window. A

proximity interrupt is defined as a measurement over a

threshold limit. The user can configure the device so that ALS

and proximity interrupts occur simultaneously, up to 16 times

in a row, before the interrupt pin is activated.

The ISL29030A is designed to operate at 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.

Pin Configuration

March 31, 2011

FN7722.1

*THERMAL PAD CAN BE CONNECTED TO GND OR

ELECTRICALLY ISOLATED

REXT

8 LD ODFN (2.0x2.1x0.7mm)

GND

VDD

ALS

ISL29030A

TOP VIEW

THERMAL

PAD

IRDR

INT

SDA

SCL

ALS

1-888-INTERSIL or 1-888-468-3774

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

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 Microcontroller Code

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

• Analog 420μA Output Pin I

Proximity Sensing

• Proximity Sensor with Broad IR Spectrum

• IR LED Driver with I

• Ambient IR Noise Cancelation (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)

Applications

• Display and Keypad Dimming Adjustment and Proximity

• Industrial and Medical Light and Proximity Sensing

- 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

Sensing for:

- Mobile Devices: Smart Phone, PDA, GPS

- Computing Devices: Laptop PC, Netbook

- Consumer Devices: LCD-TV, Digital Picture Frame, Digital

C (SMBus Compatible) Output

for 100μs Every 800ms)

Camera

All other trademarks mentioned are the property of their respective owners.

C Programmable Sink Currents

C Interface

ALS

Proportional to Lux

Related parts for isl29030a

isl29030a Summary of contents

Page 1

... The user can configure the device so that ALS and proximity interrupts occur simultaneously times in a row, before the interrupt pin is activated. The ISL29030A is designed to operate at 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

... 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. 3. For Moisture Sensitivity Level (MSL), please see device information page for ISL29030A. For more information on MSL please see techbrief TB477. 2 ...

Page 3

... Light Count Output with LSB of ALS_1 0.0326 lux/count DATA Light Count Output With LSB of ALS_2 0.522 lux/count 3 ISL29030A Thermal Information (T = +25 C) ° A Thermal Resistance (Typical, Note ODFN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

Page 4

... Pulse Width of Spikes that must be Suppressed by SP the Input Filter t SCL Falling Edge to SDA Output Data Valid AA C Capacitance for each SDA and SCL Pin i 4 ISL29030A V = 3.0V +25° 499kΩ 1% tolerance EXT CONDITION (Note 15Ω at IRDR pin, ...

Page 5

... I C limits are based on design/simulation and are not production tested. 12 the capacitance of the bus in pF ISL29030A For SCL and SDA unless otherwise noted, V (Continued) CONDITION After this period, the first clock pulse is generated Measured at the 30% of VDD crossing ...

Page 6

... ALS_RANGE (ALS Range 0x00 ALSIR_MODE (ALSIR Mode) 6 ISL29030A 2 C. Registers 0x1 and 0x2 define the operation mode of the device. Registers 0x3 through 0x7 TABLE 1. ISL29030A 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

... ALSIR_HT[11:4] (ALS/IR High Thr.) 7 ISL29030A 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” For bits 6:5 = (see the following) 00; set PROX_FLAG if 1 conversion result trips the threshold value 01 ...

Page 8

... SDA DRIVEN BY MASTER A SDA DRIVEN BY MASTER FUNCTION/OPERATION FUNCTION/OPERATION FUNCTION/OPERATION FUNCTION/OPERATION FUNCTION/OPERATION DEVICE ADDRESS A DATA BYTE0 SDA DRIVEN BY ISL29030A FN7722.1 March 31, 2011 ...

Page 9

... PROX_SLP (Register 1 Bits [6:4]). Ambient Light and IR Sensing The ISL29030A is set for ambient light sensing when Register bit ALSIR_MODE = 0 and ALR_EN = 1. The light-wavelength response of the ALS appears as shown in Figure 6. ALS measuring mode (as opposed to IR measuring mode) is set by default. ...

Page 10

... The user can set power-down in two ways. The first is to set both PROX_EN and ALS_EN bits Register 1. The second and more simple way is to set all bits in Register (0x00). Calculating Lux When in ALS mode, the ISL29030A ADC output codes are directly proportional to lux (see ALSIR_MODE bit). α E ...

Page 11

... GND SDA 4 REXT REXT ISL29030A 499kΩ 11 ISL29030A Typical Circuit α A typical application for the ISL29030A is shown in Figure 5. The RANGE (Lux/Count) ISL29030A I The device can be tied onto a system I 0.0326 compliant devices. 0.522 Soldering Considerations Convection heating is recommended for reflow soldering; direct- infrared heating is not recommended ...

Page 12

... ISL29030A V = 3.0V 499k DD EXT 1.0 0.9 FLUORESCENT 0.8 0.7 0.6 HALOGEN INCAND. 0.5 0.4 0.3 0.2 0.1 0.0 750 950 FIGURE 7. ISL29030A SENSITIVITY TO DIFFERENT 2500 2000 1500 1000 500 FIGURE 9. ALS LINEARITY OVER 3 LIGHT SOURCES (2000 LUX 160 140 120 100 FIGURE 11. V Ω HUMAN EYE ALS 300 400 500 ...

Page 13

... V (V) IRDR FIGURE 12. IRDR PULSE AMPLITUDE -40 10 TEMPERATURE (°C) FIGURE 14. STABILITY OF ALS COUNT OVER-TEMPERATURE (AT 0.00 LUX) 13 ISL29030A V = 3.0V 499k DD EXT -10 -20 -30 -40 -50 3.0 3.5 4.0 4.5 5.0 FIGURE 13. STABILITY OF ALS COUNT OVER-TEMPERATURE IRDR 100 FIGURE 15 ...

Page 14

... FIGURE 16 ODFN SENSOR LOCATION OUTLINE - DIMENSIONS ISL29030A 2.10 0. 0.50 5 FN7722.1 March 31, 2011 ...

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 ISL29030A www.intersil.com/askourstaff http://rel.intersil.com/reports/sear For additional products, see www ...

Page 16

... Package Outline Drawing L8.2.1x2.0 8 LEAD OPTICAL DUAL FLAT NO-LEAD PLASTIC PACKAGE (ODFN) Rev 3, 1/11 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 ISL29030A A 0.15 B 0.25 0.50 1.50 2. ± BOTTOM VIEW 0.70±0.05 SIDE VIEW (1.50 REF C (8x0.20) DETAIL "X" NOTES: 1. ...

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