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AS7331 数据表(PDF) 33 Page - ams-OSRAM AG

部件名 AS7331
功能描述  Spectral UVA/B/C Sensor
PDF  72 Pages
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制造商  AMSOSRAM [ams-OSRAM AG]
网页  https://ams-osram.com/
标志 AMSOSRAM - ams-OSRAM AG

AS7331 数据表(HTML) 33 Page - ams-OSRAM AG

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AS7331
Functional Description
Datasheet
• PUBLIC
DS001047
• v4-00 • 2023-Mar-24
71
│ 32
The calculation of the input light irradiance by Equation 4 is more precise than the result of Equation 3
because the tolerances of the clock frequency fCLK, are eliminated. The irradiance responsivity Re, and
internal conversion time TCONV are determined by the content of register bits CREG1:GAIN and
CREG1:TIME (see Figure 48). Their values directly determine the sensitivity, the LSB value, and the
full-scale range (FSR) of the detectable irradiance, Ee, of the A/D conversion.
Information
The values in the Figure 27 up to Figure 32 are calculations based on the general sensitivity
without any influences of system and opto-mechanical setup. These values are only an indication
for the sensor configuration.
Figure 27:
UVA-
Channel (λ = 315 nm – 410 nm) Programmable FSR and LSB of the Detectable Input Light
Irradiance Ee
TIME(1)
0
1
2
3
4
5
6
7
NCLK
(1)
1024
2048
4096
8192
16384
32768
65536
131072
TCONV[ms]
(1)
1
2
4
8
16
32
64
128
RESOL[bit]
(1)
10
11
12
13
14
15
16
17
GAIN
(1)
FSR [µW/cm²] of detectable irradiance Ee (channel A)
2048x
170.000(2)
85.000
1024x
340.000
170.000
512x
680.000
340.000
256x
1360.000
680.000
128x
2720.000
1360.000
64x
5440.000
2720.000
32x
10880.000
5440.000
16x
21760.000
10880.000
8x
43520.000
21760.000
4x
87040.000
43520.000
2x
174080.000
87040.000
1x
348160.000
174080.000
GAIN
(1)
LSB [nW/cm²]
– least significant bit of FSR (channel A)
2048x
166.02
83.01
41.50
20.75
10.38
5.19
2.59
1.30
1024x
332.03
166.02
83.01
41.50
20.75
10.38
5.19
2.59
512x
664.06
332.03
166.02
83.01
41.50
20.75
10.38
5.19
256x
1328.13
664.06
332.03
166.02
83.01
41.50
20.75
10.38
128x
2656.25
1328.13
664.06
332.03
166.02
83.01
41.50
20.75
64x
5312.50
2656.25
1328.13
664.06
332.03
166.02
83.01
41.50
32x
10625.00
5312.50
2656.25
1328.13
664.06
332.03
166.02
83.01



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