TSL2550 Просмотр технического описания (PDF) - austriamicrosystems AG
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TSL2550 Datasheet PDF : 21 Pages
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TSL2550
AMBIENT LIGHT SENSOR
WITH SMBus INTERFACE
TAOS029L − OCTOBER 2007
Electrical Characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
MIN TYP MAX UNIT
VOL SMBus output low voltage
IO = 50 μA
IO = 4 mA
0.01
V
0.4
IDD Supply current
lid IIH
High level input current
IIL
Low level input current
Active, VSMBCLK and VSMDATA = VDD,
VDD = 3.3 V ± 5%
Power down, VSMBCLK and VSMDATA =
VDD, VDD = 3.3 V ± 5%
VI = VDD
VI = 0
0.35 0.6 mA
10 μA
5 μA
−5 μA
a Operating Characteristics, VDD = 3.3 V, TA = 255C (unless otherwise noted) (see Notes 2, 3, 4)
v PARAMETER
TEST CONDITIONS
CHANNEL MIN TYP MAX UNIT
ill Ee= 0
Ch0
1
Ch1
1
t ADC count value, standard mode
λp = 640 nm
Ee = 72 μW/cm2
Ch0
639 799 959
counts
Ch1
85
G s λp = 940 nm
Ee = 140 μW/cm2
Ch0
511 799 1039
Ch1
703
A t Ee= 0
Ch0
1
Ch1
1
s n ADC count value, extended mode
λp = 640 nm
Ee = 72 μW/cm2
Ch0
155
counts
Ch1
16
am nte ADC count value ratio: Ch1/Ch0,
standard mode
l co Re Irradiance responsivity, standard mode
λp = 940 nm
Ee = 140 μW/cm2
λp = 640 nm, Ee = 72 μW/cm2
λp = 940 nm, Ee = 140 μW/cm2
λp = 640 nm
Ee = 72 μW/cm2
λp = 940 nm
Ee = 140 μW/cm2
Ch0
155
Ch1
139
0.070 0.106 0.175
0.70 0.88 1.20
Ch0
11.1
Ch1
1.2
counts/
(μW/
Ch0
5.7
cm2)
Ch1
5
ica Rv Illuminance responsivity, standard mode
Ch0
Fluorescent light source: 300 Lux
Ch1
Ch0
Incandescent light source: 50 Lux
Ch1
2.8
0.23
counts/
19
lux
13
(Sensor Lux) / (actual Lux), standard mode
n (Note 5)
Fluorescent light source: 300 Lux
Incandescent light source: 50 Lux
0.65
1 1.35
0.5
1 1.5
NOTES: 3. Optical measurements are made using small-angle incident radiation from light-emitting diode optical sources. Visible 640 nm LEDs
h and infrared 940 nm LEDs are used for final product testing for compatibility with high volume production.
4. The 640 nm irradiance Ee is supplied by an AlInGaP light-emitting diode with the following characteristics: peak wavelength
cλp = 640 nm and spectral halfwidth Δλ½ = 17 nm.
5. The 940 nm irradiance Ee is supplied by a GaAs light-emitting diode with the following characteristics: peak wavelength
eλp = 940 nm and spectral halfwidth Δλ½ = 40 nm.
6. The sensor Lux is calculated using the empirical formula shown on p. 11 of this data sheet based on measured Ch0 and Ch1 ADC
T count values for the light source specified. Actual Lux is obtained with a commercial luxmeter. The range of the (sensor Lux) / (actual
Lux) ratio is estimated based on the variation of the 640 nm and 940 nm optical parameters. Devices are not 100% tested with
fluorescent or incandescent light sources.
The LUMENOLOGY r Company
r
Copyright E 2007, TAOS Inc.
r
www.taosinc.com
3
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