ETC TSL250

TSL250, TSL251, TSL252
LIGHTTOVOLTAGE OPTICAL SENSORS
TAOS020A – JUNE 2001
Monolithic Silicon IC Containing
PACKAGE
(FRONT VIEW)
Photodiode, Operational Amplifier, and
Feedback Components
Converts Light Intensity to a Voltage
High Irradiance Responsivity, Typically 80
mV/(W/cm2) at p = 880 nm (TSL250)
Compact 3–leaded Clear Plastic Package
Single Voltage Supply Operation
Low Dark (Offset) Voltage....10mV
Low Supply Current......800 A Typical
Wide Supply-Voltage Range.... 3 V to 9 V
1
2
GND VDD
3
OUT
DISCONTINUED DEVICES — these devices have been superceded by new
devices and are being discontinued. The TSL250, TSL251, and TSL252 have
been replaced by the TSL250R, TSL251R, and TSL252R, respectively.
Description
The TSL250, TSL251, and TSL252 are light-to-voltage optical sensors, each combining a photodiode and a
transimpedance amplifier (feedback resistor = 16 MΩ, 8 MΩ, and 2 MΩ respectively) on a single monolithic IC.
Output voltage is directly proportional to the light intensity (irradiance) on the photodiode. These devices use
a silicon-gate CMOS technology that provides improved amplifier offset-voltage stability and low power
consumption.
Functional Block Diagram
–
Voltage
Output
+
Terminal Functions
TERMINAL
NAME
DESCRIPTION
NO.
GND
1
Ground (substrate). All voltages are referenced to GND.
OUT
3
Output voltage
VDD
2
Supply voltage
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Copyright 2001, TAOS Inc.
Texas Advanced Optoelectronic Solutions Inc.
800 Jupiter Road, Suite 205 Plano, TX 75074 (972) 673-0759
1
TSL250, TSL251, TSL252
LIGHTTOVOLTAGE OPTICAL SENSORS
TAOS020A – JUNE 2001
Absolute Maximum Ratings over operating free-air temperature range (unless otherwise noted)†
Supply voltage, VDD (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 V
Output current, IO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±10 mA
Duration of short-circuit current at (or below) 25°C (see Note 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 s
Operating free-air temperature range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –25°C to 85°C
Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –25°C to 85°C
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 240°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
NOM
Supply voltage, VDD
3
5
Operating free-air temperature, TA
0
MAX
UNIT
9
V
70
°C
Electrical Characteristics at VDD = 5 V, TA = 25°C, λp = 880 nm, RL = 10 kΩ (unless otherwise noted)
(see Note 3)
PARAMETER
TSL250
TEST
CONDITIONS
MIN
MAX
3
10
VD
Dark voltage
Ee = 0
VOM
Maximum output
voltage swing
Ee = 2 mW/cm2
3.1
3.5
Ee = 25 µW/cm2
1
2
VO
Output
Out
ut voltage
αvo
Ne
Irradiance
responsivity
Supply
y current
TSL252
TYP
MAX
3
10
3.1
3.5
1
2
MIN
Ee = 25 µW/cm2,
TA = 0°C to 70°C
MAX
3
10
3.1
3.5
1
2
UNIT
mV
V
V
3
±1
Ee = 45 µW/cm2,
TA = 0°C to 70°C
±1
mV/°C
µW/cm2,
Ee = 285
TA = 0°C to 70°C
±1
See Note 4
Ee = 45
TYP
3
µW/cm2
80
Ee = 25 µW/cm2
IDD
MIN
3
Ee = 45 µW/cm2
Ee = 285
Temperature
coefficient of
out
ut voltage
output
(VO)
TSL251
TYP
900
45
mV/(µW/cm2)
7
1600
µW/cm2
900
µA
µ
1600
Ee = 285 µW/cm2
900
1600
NOTES: 3. The input irradiance Ee is supplied by a GaAlAs infrared-emitting diode with λp = 880 nm.
4. Irradiance responsivity is characterized over the range VO = 0.05 to 3 V.
Operating Characteristics at TA = 25°C (see Figure 1)
TSL250
PARAMETER
TEST CONDITIONS
MIN
TYP
TSL251
MAX
MIN
TYP
TSL252
MAX
MIN
TYP
MAX
UNIT
tr
Output pulse rise time
VDD = 5 V,
λp = 880 nm
360
90
7
µs
tf
Output pulse fall time
VDD = 5 V,
λp = 880 nm
360
90
7
µs
Vn
Output noise voltage
VDD = 5 V,
f = 20 Hz
0.6
0.5
0.4
Copyright 2001, TAOS Inc.
2
µV/√Hz
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TSL250, TSL251, TSL252
LIGHTTOVOLTAGE OPTICAL SENSORS
TAOS020A – JUNE 2001
PARAMETER MEASUREMENT INFORMATION
VDD
Pulse
Generator
Ee
2
Input
LED
(see Note A)
–
3
tf
tr
Output
+
90%
RL
TSL25xR
1
Output
(see Note B)
10%
90%
10%
VOLTAGE WAVEFORM
TEST CIRCUIT
NOTES: A. The input irradiance is supplied by a pulsed AlInGaP light-emitting diode with the following characteristics: λp = 635 nm,
tr < 1 µs, tf < 1 µs.
B. The output waveform is monitored on an oscilloscope with the following characteristics: tr < 100 ns, Zi ≥ 1 MΩ, Ci ≤ 20 pF.
Figure 1. Switching Times
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Copyright 2001, TAOS Inc.
3
TSL250, TSL251, TSL252
LIGHTTOVOLTAGE OPTICAL SENSORS
TAOS020A – JUNE 2001
TYPICAL CHARACTERISTICS
OUTPUT VOLTAGE
vs
IRRADIANCE
PHOTODIODE SPECTRAL RESPONSIVITY
1
TA = 25°C
VDD = 5 V
λp = 880 nm
No Load
TA = 25°C
1
0.8
TSL250
Relative Responsivity
VO – Output Voltage – V
10
TSL251
0.1
TSL252
0.6
0.4
0.01
0.2
0.001
0.1
1
10
Ee – Irradiance – µW/cm2
0
300
100
500
Figure 2
SUPPLY CURRENT
vs
OUTPUT VOLTAGE
1
9
Ee = 2.6 mW/cm2
λp = 880 nm
RL = 10 kΩ
TA = 25°C
8
I DD – Supply Current – mA
VOM – Maximum Output Voltage – V
1100
Figure 3
MAXIMUM OUTPUT VOLTAGE
vs
SUPPLY VOLTAGE
7
6
5
4
0.8
0.6
0.4
VDD = 5 V
No Load
(RL = ∞)
TA = 25°C
0.2
3
2
4
5
6
7
8
VDD – Supply Voltage – V
9
10
0
0
1
Figure 4
Copyright 2001, TAOS Inc.
4
700
900
λ – Wavelength – nm
2
3
VO – Output Voltage – V
4
Figure 5
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TSL250, TSL251, TSL252
LIGHTTOVOLTAGE OPTICAL SENSORS
TAOS020A – JUNE 2001
TYPICAL CHARACTERISTICS
NORMALIZED OUTPUT VOLTAGE
vs
ANGULAR DISPLACEMENT
1
TSL250
TSL251, 252
0.6
Optical Axis
VO – Normalized Output Voltage
0.8
0.4
0.2
0
80°
60°
40° 20°
0°
20° 40°
θ – Angular Displacement
60°
80°
Figure 6
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Copyright 2001, TAOS Inc.
5
TSL250, TSL251, TSL252
LIGHTTOVOLTAGE OPTICAL SENSORS
TAOS020A – JUNE 2001
MECHANICAL INFORMATION
The photodiode/amplifier chip is packaged in a clear plastic three-leaded package. The integrated photodiode active
area is typically 1,0 mm2 (0.0016 in2) for TSL250, 0,5 mm2 (0.00078 in2) for the TSL251, and 0,26 mm2 (0.0004 in2)
for the TSL252.
2,0 (0.079) T.P.†
0,75 (0.030)
0,65 (0.026)
2,25 (0.089)
1,75 (0.069)
0,635 (0.025)
0,4 (0.016)
Pin 1
Pin 2
Pin 3
1,25 (0.049)
0,75 (0.029)
GND
VDD
OUT
1
2
4,0 (0.157) T.P.†
3
1
2
0,65 (0.026)
0,55 (0.022)
0,86 (0.034)
0,46 (0.018)
15,7 (0.619)
13,2 (0.520)
3,05 (0.120)
2,55 (0.100)
4,8 (0.189)
4,4 (0.173)
4,85 (0.191)
4,35 (0.171)
0,85 (0.033)
0,35 (0.014)
0,51 (0.02)
0,385 (0.015)
3
2,05 (0.081)
1,55 (0.061)
0,75 (0.030) R
5,05 (0.199)
4,55 (0.179)
1,75 (0.069)
1,25 (0.049)
4,35 (0.171)
3,85 (0.152)
2,74 (0.108)
2,34 (0.092)
†
True position when unit is installed.
NOTES: A. All linear dimensions are in millimeters (inches).
B. This drawing is subject to change without notice.
Figure 7. Mechanical Data
Copyright 2001, TAOS Inc.
6
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TSL250, TSL251, TSL252
LIGHTTOVOLTAGE OPTICAL SENSORS
TAOS020A – JUNE 2001
PRODUCTION DATA — DISCONTINUED DEVICES — while information in this document is current at
publication date, these devices have been superceded and should not be used for new designs. Please see
TAOS part numbers TSL250R, TSL251R, and TSL252R for information on the current devices.
NOTICE
Texas Advanced Optoelectronic Solutions, Inc. (TAOS) reserves the right to make changes to the products contained in this
document to improve performance or for any other purpose, or to discontinue them without notice. Customers are advised
to contact TAOS to obtain the latest product information before placing orders or designing TAOS products into systems.
TAOS assumes no responsibility for the use of any products or circuits described in this document or customer product
design, conveys no license, either expressed or implied, under any patent or other right, and makes no representation that
the circuits are free of patent infringement. TAOS further makes no claim as to the suitability of its products for any particular
purpose, nor does TAOS assume any liability arising out of the use of any product or circuit, and specifically disclaims any
and all liability, including without limitation consequential or incidental damages.
TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS, INC. PRODUCTS ARE NOT DESIGNED OR INTENDED FOR
USE IN CRITICAL APPLICATIONS IN WHICH THE FAILURE OR MALFUNCTION OF THE TAOS PRODUCT MAY
RESULT IN PERSONAL INJURY OR DEATH. USE OF TAOS PRODUCTS IN LIFE SUPPORT SYSTEMS IS EXPRESSLY
UNAUTHORIZED AND ANY SUCH USE BY A CUSTOMER IS COMPLETELY AT THE CUSTOMER’S RISK.
TAOS, the TAOS logo, and Texas Advanced Optoelectronic Solutions are trademarks of Texas Advanced Optoelectronic Solutions
Incorporated.
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Copyright 2001, TAOS Inc.
7
TSL250, TSL251, TSL252
LIGHTTOVOLTAGE OPTICAL SENSORS
TAOS020A – JUNE 2001
Copyright 2001, TAOS Inc.
8
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