ISL29028A is an environmental light and infrared to digital converter, with built -in infrared LED drives and I2C interfaces (compatible with SMBUS). The device uses two independent ADCs to measure the environmental light and closeness. The flexible interrupt solution is used for minimum micro controller. For environmental light sensors (ALS) data conversion, the ADC conversion of optical diode current (the range of light sensitivity is as high as 2000 Lax), each 100 milliseconds. ADC rejects the flickering noise caused by 50 Hz/60 Hz's artificial light source. For data conversion close to the sensor (PROX), the built -in driver opens the external infrared LED and the close -sensor ADC to convert the reflected infrared strength into numbers. This ADC inhibits environmental infrared noise (such as sunlight) and has 540 μs conversion time. ISL29028A provides approximation of ALS and typical 138μA normal working current (sensors and internal circuits are 110 μA and 28 μA outside) at 220mA current pulse, and repeats 800 milliseconds (or below) per 100 μs. ISL29028A uses hardware pins and software to indicate an interrupt incident. ALS interrupt is defined as measurement outside the window. A close interrupt is defined as a threshold limit. Users may also require ALS/PROX to interrupt once, and activate the interrupt pins up to 16 consecutive times. The design voltage of ISL29028A is from 2.25V to 3.63V-40 ° C to+85 ° C. It is packaged in a clear lead 8 lead ODFN packaging.

Application

Display and keyboard lighting adjustment and close to

induction: -Muo device: smartphone, PDA, GPS-computing device: laptop computer, Internet book-consumer equipment-consumer equipment : LCD TV, digital photo frame, digital camera

Industrial and medical lighting and neighboring sensing

Features

Work under all light sources including the sun

[ 123] Dual ADC measures ALS/PROX

Intelligent interrupt solution simplifies μC code

0.5%typical non -linear environmental optical response

Simple output code is proportional to Lax [123 123

]

50 Hz/60 Hz flickering noise and infrared suppression

Light sensor response to the human eye

Optional 125/2000 Lax Near the sensor of the wide infrared spectrum-850nm and 950nm external infrared LED

infrared LED drive with I2C programming receiver current-110MA or 220ma's net 100 μS pulse-pulse-pulse pulse time between cyclical sleep time Up to 800ms

Environment redExternal noise elimination (including sunlight) Intelligent and flexible interruption

Independent ALS/PROX interrupt threshold

A adjustable interrupt continuity-1/4/8/16 continuous trigger super Low power consumption

138 μA DC typical power currents for ALS/PROX sensor-a typical current with 110 μA-28 μA external infrared LED (assuming 220 mAh, 100 μs per 800 milliseconds) [123 ]

During the power off, lt; 1.0μA power current

Settown the register; wait for the interruption

I2C (compatible with SMBUS) output

] Temperature compensation

Micro ODFN8 2.0x2.1x0.7 (mm) Packaging

additional features

1.7V to 3.63V power supply

2.25V to 3.63V sensor power supply

Leadless (in line with ROHS)

I2C address selecting pin

Note:

1. For details, please refer to TB347.

2. These Intersil lead-free plastic packaging products use a special lead-free material group; mold/mold connection material and NIPDAU board-E4-end jewelry, which meets the ROHS standard, and SNPB and lead-free welding operations compatible. Lead-free product is MSL classified at the lead-unsecured peak return welding temperature that meets or exceeds IPC/JEDEC J STD-020.

3. For the level of humidity sensitivity (MSL), see the device information page of ISL29028A. For more information about MSL, see the introduction of technical introduction TB477.

Absolutely maximum rated value (TA +25 ° C) heat information

VDD power supply voltage between VDD and GND. 4.0 volts

I2C bus pins voltage (SCL, SDA). -0.5 volts to 4.0 volts

I2C bus pins (SCL, SDA). lt; 10mAh

Rext pins voltage. -0.5V to VDD+0.5V

IRR pin voltage. 5.5 il

ADDR0 pin voltage. -0.5V to VDD+0.5V

Internal pin voltage. -0.5 volt to 4.0 volts

Internal pin current. lt; 10 mia

Static discharge rated value

Human model (Note 6).2 kV

Thermal resistance (typical value) θJa (degrees Celsius/tile) θjc (degrees Celsius/tile)

8 LD ODFN packaging (Note 4, 5). 88 10

Molding the highest temperature. +90 degrees Celsius

Storage temperature. -40 ° C to+100 ° C

The operating temperature. -40 ° C to+85 ° C

Note: Do not run for a long time under the maximum rated value listed. Under these conditions, it may adversely affect the product

reliability, causing failure within the range of warranty.

Note:

4. θja is measured in free air, which is installed on high -efficiency thermal guidance test boards with direct connection " characteristics. See the technology brief explanation TB379.

5. For θjc