r
r
TSL254R
LIGHT-TO-VOLTAGE OPTICAL SENSOR
TAOS071C
−
SEPTEMBER 2007
D
Monolithic Silicon IC Containing
D
D
D
D
D
D
D
D
D
RoHS Compliant (−LF Package Only)
Photodiode, Operational Amplifier, and
Feedback Components
Converts Light Intensity to a Voltage
Irradiance Responsivity, Typically
9 mV/(mW/cm
2
) at
l
p
= 635 nm
Compact 3-Lead Clear Plastic Package
Single Voltage Supply Operation
Low Dark (Offset) Voltage....10 mV Max
Low Supply Current......1.1 mA Typical
Wide Supply-Voltage Range.... 2.7 V to 5.5 V
Replacement for TSL254
PACKAGE S
SIDELOOKER
(FRONT VIEW)
PACKAGE SM
SURFACE MOUNT
SIDELOOKER
(FRONT VIEW)
1
GND
2
V
DD
3
OUT
Description
1
GND
2
V
DD
3
OUT
The TSL254R is a light-to-voltage optical sensor combining a photodiode and a transimpedance amplifier
(feedback resistor = 1 MΩ) on a single monolithic IC. Output voltage is directly proportional to the light intensity
(irradiance) on the photodiode. The device has improved amplifier offset-voltage stability and low power
consumption and is supplied in a 3-lead clear plastic sidelooker package with an integral lens. When supplied
in the lead (Pb) free package, the device is RoHS compliant.
Functional Block Diagram
−
+
Voltage
Output
Available Options
DEVICE
TSL254R
TSL254R
TSL254R
T
A
0°C to 70°C
0°C to 70°C
0°C to 70°C
PACKAGE
−
LEADS
3-lead Sidelooker
3-lead Sidelooker — Lead (Pb) Free
3-lead Surface-Mount Sidelooker — Lead (Pb) Free
PACKAGE DESIGNATOR
S
S
SM
ORDERING NUMBER
TSL254R
TSL254R−LF
TSL254RSM−LF
Terminal Functions
TERMINAL
NAME
GND
OUT
V
DD
NO.
1
3
2
Output voltage
Supply voltage
DESCRIPTION
Ground (substrate). All voltages are referenced to GND.
The
LUMENOLOGY
r
Company
Texas Advanced Optoelectronic Solutions Inc.
1001 Klein Road
S
Suite 300
S
Plano, TX 75074
S
(972) 673-0759
r
www.taosinc.com
1
r
Copyright
E
2007, TAOS Inc.
TSL254R
LIGHT-TO-VOLTAGE OPTICAL SENSOR
TAOS071C
−
SEPTEMBER 2007
Absolute Maximum Ratings over operating free-air temperature range (unless otherwise noted)
†
Supply voltage, V
DD
(see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 V
Output current, I
O
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
±
10 mA
Duration of short-circuit current at (or below) 25°C (see Note 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 s
Operating free-air temperature range, T
A
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
−25°C
to 85°C
Storage temperature range, T
stg
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
−25°C
to 85°C
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds (S Package) . . . . . . . . . . . . . . . . . . . . 260°C
Reflow solder, in accordance with J-STD-020C or J-STD-020D (SM Package) . . . . . . . . . . . . . . . . . . . 260°C
†
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTES: 1. All voltages are with respect to GND.
2. Output may be shorted to supply.
Recommended Operating Conditions
MIN
Supply voltage, V
DD
Operating free-air temperature, T
A
2.7
0
NOM
MAX
5.5
70
UNIT
V
°C
Electrical Characteristics at V
DD
= 5 V, T
A
= 25
°
C,
λ
p = 635 nm, R
L
= 10 k
Ω
(unless otherwise noted)
(see Notes 3, 4, and 5)
PARAMETER
V
D
V
OM
V
O
α
vo
R
e
I
DD
Dark voltage
Maximum output voltage
Output voltage
Temperature coefficient of output voltage (V
O
)
Irradiance responsivity
Supply current
E
e
= 0
V
DD
= 4.5 V
E
e
= 222
μW/cm
2
V
O
= 2 V @ 25°C,
25 C,
T
A
= 0°C to 70°C (see Note 6)
See Notes 5 and 7
E
e
= 222
μW/cm
2
TEST
CONDITIONS
TSL254R
MIN
0
3.0
1.5
TYP
5
3.3
2
2
0.1
9
1.1
1.7
2.5
MAX
10
UNIT
mV
V
V
mV/°C
%/°C
mV/(μW/cm
2
)
mV/( W/cm
mA
NOTES: 3.
4.
5.
6.
Measurements are made with R
L
= 10 kΩ between output and ground.
Optical measurements are made using small-angle incident radiation from an LED optical source.
The input irradiance E
e
is supplied by an AlInGaP LED with peak wavelength
λ
p
= 635 nm
The temperature coefficient of output voltage measurement is made by adjusting irradiance such that V
O
is approximately 2 V at
25°C and then with irradiance held constant, measuring V
O
while varying the temperature between 0°C and 70°C.
7. Irradiance responsivity is characterized over the range V
O
= 0.05 to 2.9 V. The best-fit straight line of Output Voltage V
O
versus
irradiance E
e
over this range will typically have a positive extrapolated V
O
value for E
e
= 0.
Dynamic Characteristics at V
DD
= 5 V, T
A
= 25
°
C,
λ
p = 635 nm, R
L
= 10 k
Ω
(see Figure 1)
PARAMETER
t
r
t
f
Output pulse rise time
Output pulse fall time
TEST CONDITIONS
V
O(peak)
= 2 V
V
O(peak)
= 2 V
E
e
= 0, V
O
= V
D
V
n
Output noise voltage
E
e
= 0, V
O
= V
D
V
O
= 2 V
V
O
= 2 V
f = 1 kHz
f = 10 kHz
f = 1 kHz
f = 10 kHz
TSL254R
MIN
TYP
2.5
2.5
1
1
1.5
1.5
μV/√Hz
MAX
UNIT
μs
μs
Copyright
E
2007, TAOS Inc.
r
r
The
LUMENOLOGY
r
Company
2
www.taosinc.com
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