AS7331 datasheet(52/72 Pages) OSRAM

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AS7331

Datasheet

• PUBLIC

DS001047

• v4-00 • 2023-Mar-24

│ 51

This case indicates that the Application Programming Interface (API) has been changed. The default

value for the AS7331 is 21h.

Figure 47:

API Generation Register

Addr: 2h

AGEN

Bit

Bit Name

Default

Access

Bit Description

7:4

DEVID

0010

Device ID number.

3:0

MUT

0001

Mutation number of control

8.2.3

Configuration Register 1

– CREG1 (Address 6h)

CREG1:GAIN determines the irradiance responsivity of the sensor, which is different regarding the

channels A, B, and C, and in each case regarding to the used wavelen

gth λ. Internally the A/D

converter runs with different gain factors concerning the bit CREG1:GAIN (see Figure 33).

CREG1:TIME controls the conversion time duration as a multiple of the internal clock periods. In case

the start and end of measurement are controlled externally via the input trigger signal at the SYN pin

(equal to SYND mode). CREG1:TIME does not influence the conversion time.

Figure 48:

Configuration Register 1

Addr: 6h

CREG1

Bit

Bit Name

Default

Access

Bit Description

7:4

GAIN

1010

Defines the irradiance responsivity of the AS7331.

CREG1:TIME = 1010b (1024 ms)

CREG3:CCLK = 00b (1 MHz)

Value [b]

Index Channels

A/B/C

Full Scale

Range Ee

[µW/cm2]

Effective

LSB of

FSR

[nw/cm2]

0000

GAINA = 2048x

10.63

0.16

GAINB = 2048x

11.81

0.18

GAINC = 2048x

5.19

0.08

0001

GAINA = 1024x

21.25

0.32

GAINB = 1024x

23.63

0.36

GAINC = 1024x

10.38

0.16

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