MAX44007(2010) View Datasheet(PDF) - Maxim Integrated

Part Name

Description

Manufacturer

MAX44007
(Rev.:2010)

Low-Power Digital Ambient Light Sensor with Enhanced Sensitivity

Maxim Integrated 

Low-Power Digital Ambient Light Sensor

with Enhanced Sensitivity

Continuous Mode

Table 4. Continuous Mode Register

BIT 7

OPERATION

0

Default mode. The IC measures lux intensity only once every 800ms regardless of integration time. This mode

allows the part to operate at its lowest possible supply current.

Continuous mode. The IC continuously measures lux intensity. That is, as soon as one reading is finished, a

1

new one begins. If integration time is 6.25ms, readings are taken every 6.25ms. If integration time is 800ms,

readings are taken every 800ms. In this mode, the part consumes slightly higher power than in the default

mode.

Note: Continuous mode is independent of the manual configuration mode setting.

Manual Configuration Mode

In automatic mode (MANUAL = 0), reading the contents of TIM[2:0] and CDR bits reflects the automatically generated

values from an internal timing register and are read-only. In manual mode (MANUAL = 1), the contents of TIM[2:0] and

CDR bits can be modified by the users through the I2C bus.

Table 5. Manual Configuration Register

BIT 6

0

OPERATION

Default mode of configuration is used for the IC. In this mode, CDR, TIM[2:0] bits are automatically

determined by the internal autoranging circuitry of the IC.

1

Manual mode of configuration is used for the IC. In this mode, CDR, and TIM[2:0] bits can be programmed by

the user.

Current Division Ratio (CDR)

The CDR bit controls the current division ratio. The photodiode current is divided as shown in Table 6.

Table 6. Current Division Ratio Register

BIT 3

0

1

OPERATION

Current not divided. All of the photodiode current goes to the ADC.

Current divided by 8. Only 1/8 of the photodiode current goes to the ADC. This mode is used in

high-brightness situations.

9

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