Datasheet

TSL2591 – 6 Datasheet - Apr. 2013 - ams163.5
Figure TSL2591 – 9:
ALS Characteristics, V
DD
=3V, T
A
=25ºC, AGAIN = Max, AEN=1, (unless otherwise noted) (Notes 1, 2, 3),
Notes:
1. Optical measurements are made using small-angle incident radiation from light-emitting diode optical sources. Visible white
LEDs and infrared 850 nm LEDs are used for final product testing for compatibility with high-volume production
2. The white LED irradiance is supplied by a white light-emitting diode with a nominal color temperature of 4000 K.
3. The 850 nm irradiance is supplied by a GaAs light-emitting diode with the following typical characteristics: peak wavelength
λ
p
= 850 nm and spectral halfwidth λ½ = 42 nm.
4. Parameter ensured by design and is not 100% tested.
Parameter Conditions Channel Min Typ Max Units
Dark ADC count
value
E
e
= 0,
ATIME=000b (100ms)
CH0
CH1
0
0
25
25
counts
ADC integration
time step size
ATIME = 000b (100ms) 95 101 108 ms
ADC number of
integration steps
(Note 4)
16steps
ADC counts per
step
ATIME = 000b (100ms) 0 37888 counts
ADC count value ATIME = 101b (600ms) 0 65535 counts
ADC count value
White light (Note 2)
E
e
= 4.98 W/cm
2
ATIME = 000b (100 ms)
CH0
CH1
25500 30000
4996
34500
counts
λ
p
= 850 nm (Note 3)
E
e
= 5.62 W/cm
2
,
ATIME = 000b (100 ms)
CH0
CH1
25500 30000
19522
34500
counts
ADC count value
ratio: CH1/CH0
White light (Note 2) 0.116 0.166 0.216
λ
p
= 850 nm (Note 3)
0.456 0.652 0.848
R
e
Irradiance
responsivity
White light (Note 2)
ATIME = 000b (100 ms)
CH0
CH1
6024
1003
counts/
(W/cm
2
)
λ
p
= 850 nm (Note 3)
ATIME = 000b (100 ms)
CH0
CH1
5338
3474
Noise
(Note 4)
White light (Note 2)
E
e
= 4.98 W/cm
2
ATIME = 000b (100 ms)
CH0 1 2
1 standard
deviation
Gain scaling,
relative to 1× gain
setting
AGAIN = Low
AGAIN = Med
AGAIN = High
AGAIN = Max
1
25
428
9876
×