VM6101 Просмотр технического описания (PDF) - STMicroelectronics

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производитель

VM6101

I²C color light sensor

STMicroelectronics 

Functional description

VM6101

2.1

Light measurement channels

The VM6101 has four independent wide dynamic range photosensors and current-to-

frequency converters. Each channel produces a digital output with a frequency proportional

to the incoming light level on the photosensor. By construction, the device ensures

automatic exposure control.

Figure 2. Light-to-Frequency converter (L2F)

The output period is measured using a 27-bit free-running counter and the internal 3.6 MHz

oscillator clock; counter values are then read through the serial interface.

The typical light response is shown in Figure 3. below, obtained using a CIE D65 white point

light source (~ daylight illumination) and no light diffuser.

Figure 3. Light response

100000001.0E+07

B

B

G

G

10000001.0E+0R6

R

Y

Y

1000001.0E+05

100001.0E+04

10001.0E+03

1

1

10 10

100 100

Lum inIllaunmcein(alxn)ce (lx)

10001000

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