TSL2550T TAOS, TSL2550T Datasheet - Page 3

• Manufacturer Part Number: TSL2550T
• Description: Industrial Optical Sensors Ambient Light Sensor SMBus
• Manufacturer: TAOS
• Type: Ambient Light Sensor with Digital Outputr

Specifications of TSL2550T

• Product: Ambient Light Sensor
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Electrical Characteristics over recommended operating free-air temperature range (unless
otherwise noted)
Operating Characteristics, V
NOTES: 3. Optical measurements are made using small-angle incident radiation from light-emitting diode optical sources. Visible 640 nm LEDs
The LUMENOLOGY r Company
V
V
I
I
I
I
R
R
R
R
DD
IH
IL
OL
e
v
ADC count value standard mode
ADC count value, standard mode
ADC count value extended mode
ADC count value, extended mode
ADC count value ratio: Ch1/Ch0,
ADC count value ratio: Ch1/Ch0,
standard mode
Irradiance responsivity standard mode
Irradiance responsivity, standard mode
Illuminance responsivity standard mode
Illuminance responsivity, standard mode
(Sensor Lux) / (actual Lux), standard mode
(Sensor Lux) / (actual Lux), standard mode
(Note 5)
SMBus output low voltage
SMBus output low voltage
Supply current
Supply current
High level input current
Low level input current
4. The 640 nm irradiance E
5. The 940 nm irradiance E
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
and infrared 940 nm LEDs are used for final product testing for compatibility with high volume production.
λp = 640 nm and spectral halfwidth Δλ½ = 17 nm.
λp = 940 nm and spectral halfwidth Δλ½ = 40 nm.
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.
PARAMETER
PARAMETER
e
e
is supplied by an AlInGaP light-emitting diode with the following characteristics: peak wavelength
DD
is supplied by a GaAs light-emitting diode with the following characteristics: peak wavelength
= 3.3 V, T
r
E
E
λ
λ
E
λ
λ
E
E
E
λ
λ
E
λ
λ
E
λ
λ
λ
λ
E
λ
λ
E
Fluorescent light source: 300 Lux
Fluorescent light source: 300 Lux
Incandescent light source: 50 Lux
Incandescent light source: 50 Lux
Fluorescent light source: 300 Lux
Incandescent light source: 50 Lux
p
p
p
p
p
p
p
p
p
p
p
p
p
p
e
e
e
e
e
e
e
e
= 640 nm
= 640 nm
= 940 nm
= 940 nm
= 640 nm
= 640 nm
= 940 nm
= 940 nm
= 640 nm, E
= 940 nm, E
= 640 nm
= 640 nm
= 940 nm
= 940 nm
www.taosinc.com
= 0
= 72 μW/cm
= 140 μW/cm
= 0
= 72 μW/cm
= 140 μW/cm
= 72 μW/cm
= 140 μW/cm
A
I
I
Active, VSMBCLK and VSMDATA = V
V
Power down, VSMBCLK and VSMDATA =
V
VI = V
VI = 0
O
O
0
0
DD
DD,
= 255C (unless otherwise noted) (see Notes 2, 3, 4)
TEST CONDITIONS
= 50 μA
= 4 mA
= 3.3 V ± 5%
V
DD
DD
= 3.3 V ± 5%
e
e
TEST CONDITIONS
2
2
2
= 72 μW/cm
= 140 μW/cm
2
2
2
2
2
CHANNEL
r
Ch0
Ch1
Ch0
Ch1
Ch0
Ch1
Ch0
Ch1
Ch0
Ch1
Ch0
Ch1
Ch0
Ch1
Ch0
Ch1
Ch0
Ch1
Ch0
Ch1
DD,
AMBIENT LIGHT SENSOR
WITH SMBus INTERFACE
0.070
MIN
0.70
0.65
MIN
639
511
0.5
TAOS029L − OCTOBER 2007
0.106
Copyright E 2007, TAOS Inc.
TYP
0.01
0.35
TYP
0.88
0.23
11.1
799
799
703
155
155
139
1.2
5.7
2.8
85
16
19
13
5
1
1
0.175
MAX
MAX
1039
1.20
1.35
959
0.4
0.6
1.5
10
−5
5
1
1
1
1
TSL2550
counts/
counts/
counts/
counts
counts
counts
counts
UNIT
UNIT
(μW/
(μW/
cm
cm
mA
μA
μA
μA
lux
V
V
2
2
)
)
3