SFH 7770

2011-09-16

9

Characteristics (Ta = 25°C

)

Parameter

Symbol

Value

Unit

min.

typ.

max.

Ambient Light Sensor (ALS)

Wavelength of max. sensitivity

S max

555

nm

Spectral range of sensitivity (10% of S

S10%

480-660

nm

Measurement range

3

65000

counts

Sensitivity (1000lx)

Out

0.6

1

1.5

count/lx

Deviation from linear output characteristics

1)

X = 100-65000lx

X = 10-100lx

X = 3-10lx

1)

The deviation of the linear output characteristic is referenced to 1000lx and follows the formula

:

X:

sensor illumination level in lux

Y

sensor output / measurement value at illumination level X

Y

f

lin

5

10

30

%

Temperature coefficient for E

0°C ... 50°C

-15°C ... 70°C

T

cEv

- 0.20

- 0.25

+ 0.20

+ 0.25

%/K

%/K

Update of register data after MCU request

t

100

ms

Measurement repetition rate in FREE-RUNNING

mode, programmable

t

rep

100 ...

2000

ms

Mean current consumption in FREE-RUNNING

mode, t

I

act

200

μA

Current consumption in STAND-BY mode

I

stby

5μA

Error by Flicker noise

(caused by bulbs or fluorescent lamps)

(f = 50 or 60Hz, 100% modulation)

-5

+5

%

f

lin

Y

X

Y

1000lx

------------------

1000lx

X

------------------

1

–

100%

=