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How to use the ambient light sensor Maxim EOC testing

In Electronic Infomation Category: H | on May 07,2011

Maxims MAX9635, MAX44007 and LT1791ACS datasheet and MAX44009 high ambient light sensor, integrated in a single chip, photodiode, analog front end (AFE), two high-resolution analog / digital converter (ADC), comparison and LT1791ACS price and data formatting processing circuit and LT1791ACS suppliers and I? C interface functions. The light sensor has the industry-leading low operating current (0.65? A), ICC low operating voltage (1.8V), low light sensitivity, the use of 2mm x 2mm x 0.6mm small form factor package.

Light integration time of 100ms when a multiple (such as: 100/200/400/800ms), these ambient light sensor can well 50Hz/60Hz noise suppression. However, in most cases, many applications require a conversion completion signal, the ambient light sensor to reliably read the information to avoid unnecessary delays. This application note describes how to use the devices interrupt pin to provide conversion instructions, detailing the I 2 C register setting method.

Register

Light sensor I 2 C registers shown in Table 1.

Register

Bit

Register address

Power-on reset state < / o: p>

R / W

7

6

5

4

3

2

1

0

Status

Interrupt status

- < / SPAN>

- < / SPAN>

- < / SPAN>

- < / SPAN>

- < / SPAN>

- < / SPAN>

- < / SPAN>

INTS < / SPAN>

0x00 < / SPAN>

0x00 < / SPAN>

R < / SPAN>

Interrupt enable

- < / SPAN>

- < / SPAN>

- < / SPAN>

- < / SPAN>

- < / SPAN>

- < / SPAN>

- < / SPAN>

INTE < / SPAN>

0x01 < / SPAN>

0x00 < / SPAN>

R / W

Configuration

Configuration < / SPAN>

CONT < / SPAN>

MANUAL < / SPAN>

- < / SPAN>

- < / SPAN>

CDR < / SPAN>

TIM [2:0]

0x02 < / SPAN>

0x03 < / SPAN>

R / W

LUX reading

LUX high byte

E3 < / SPAN>

E2 < / SPAN>

E1 < / SPAN>

E0 < / SPAN>

M7 < / SPAN>

M6 < / SPAN>

M5 < / SPAN>

M4 < / SPAN>

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