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AS73211

Datasheet

• PUBLIC

DS000556

• v3-01 • 2018-Feb-07

│ 47

8.4

Configuration Register - CREG1, CREG2 and CREG3

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

channels X, Y and Z and in each case regar

ding to the used wave length λ. Internally the A/D

converter runs with different gain factors concerning to the bit CREG1:GAIN (see also Figure 35).

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

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

(equal to SYND mode), CREG1:TIME has no influence to the conversion time.

In general the registers CREG2 and CREG3 define the measurement modes and additional device

specific options.

Figure 48:

Configuration Register 1 (CREG1)

– Address 6h

CREG1

NAME

VALUE [b]

CONFIGURATION

bit 7 to 4

GAIN

INDEX

X-channel

λ = 0nm

Y-channel

λ = 555nm

Z-channel

λ = 445nm

CREG1:TIME = 1010b (1024ms)

CREG3:CCLK = 00b (1MHz)

Full Scale Range

of detectable irradiance Ee

[µW/cm²]

Effective Least Significant

Bit (LSB) of Full Scale

Range

[nW/cm²]

0000

GAINX = 2048x

0.866

0.0132

GAINY = 2048x

0.932

0.0142

GAINZ = 2048x

0.501

0.0076

0001

GAINX = 1024x

1.732

0.0264

GAINY = 1024x

1.865

0.0285

GAINZ = 1024x

1.002

0.0153

0010

GAINX = 512x

3.463

0.0528

GAINY = 512x

3.730

0.0569

GAINZ = 512x

2.003

0.0306

0011

GAINX = 256x

6.927

0.1057

GAINY = 256x

7.460

0.1138

GAINZ = 256x

4.006

0.0611

0100

GAINX = 128x

13.854

0.2114

GAINY = 128x

14.919

0.2276

GAINZ = 128x

8.012

0.1223

0101

GAINX = 64x

27.707

0.4228

GAINY = 64x

29.838

0.4552

GAINZ = 64x

16.024

0.2445

0110

GAINX = 32x

55.414

0.8456

GAINY = 32x

59.677

0.9106

GAINZ = 32x

32.048

0.4890

AS73211 数据表(PDF) 48 Page - OSRAM GmbH

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