ZOPT2201 datasheet(16/44 Pages) IDT

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ZOPT2201 Datasheet

September 2, 2016

3.4

Device Operation Modes

Table 3.3 Operational Mode Descriptions

Mode

Number

Mode Name

Description

Standby

Default mode after power-up.

In this mode, the oscillator, all internal support blocks, and the ADCs are switched off but I²C

communication is fully supported.

ALS

Active ADC Channels: ALS, COMP

ALS Mode allows measurement of ambient light intensity. The sensor response is closely matched

to human eye response to guarantee high lux value accuracy. Temperature compensation for the

sensor elements is carried out internally via the COMP channel.



ALS Mode is activated by setting the LS_EN bit to 1, the LS_Mode bit to 0 and the

RawMode_SEL bit to 0 in the MAIN_CTRL register (see section 3.11.1).



Write 02HEX to register 00HEX



Internal temperature compensation runs following calculation before sensor data is stored in

output register:



ALS = ALS_raw – COMP

UVBS

Active ADC Channels: UVB, UV_COMP

UVBS Mode allows high precision measurements of UVB energy intensity. The sensor response is

chosen such that it can be used to calculate the UV index directly.

Temperature and stray light compensation for the sensor channel is performed internally via the

UV_COMP channel.



UVBS Mode is activated by setting the LS_EN bit and the LS_Mode bit to 1 in the MAIN_CTRL



Write 0AHEX to register 00HEX



Internal temperature compensation runs following calculation before sensor data is stored in the

output register:



UVB = UVB_raw – UV_COMP

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