TSL267
HIGH SENSITIVITY
IR LIGHT TO VOLTAGE CONVERTER
TAOS033 OCTOBER 2001
1
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t
t
Copyright
E
2001, TAOS Inc.
D
Integral Visible Light Cutoff Filter
D
Converts IR Light Intensity to Output
Voltage
D
Monolithic Silicon IC Containing
Photodiode, Operational Amplifier, and
Feedback Components
D
High Sensitivity
D
Single Voltage Supply Operation (2.7 V to
5.5 V)
D
Low Noise (200
Vrms Typ to 1 kHz)
D
Rail-to-Rail Output
D
High Power-Supply Rejection (35 dB at
1 kHz)
D
Compact 3-Leaded Plastic Package
Description
The TSL267 is a high-sensitivity low-noise infrared light-to-voltage optical converter that combines a photodiode
and a transimpedance amplifier on a single monolithic CMOS integrated circuit. Output voltage is directly
proportional to IR light intensity (irradiance) on the photodiode. The TSL267 has a transimpedance gain of
320 M
. The device has improved offset voltage stability and low power consumption and is supplied in a 3-lead
visible-light-blocking plastic sidelooker package with an integral lens.
Functional Block Diagram
Voltage
Output
+
Terminal Functions
TERMINAL
DESCRIPTION
NAME
NO.
DESCRIPTION
GND
1
Ground (substrate). All voltages are referenced to GND.
OUT
3
Output voltage
V
DD
2
Supply voltage
t
t
Texas Advanced Optoelectronic Solutions Inc.
800 Jupiter Road, Suite 205
S
Plano, TX 75074
S
(972) 673-0759
3
2
1
OUT
V
DD
GND
PACKAGE
(FRONT VIEW)
TSL267
HIGH SENSITIVITY
IR LIGHT TO VOLTAGE CONVERTER
TAOS033 OCTOBER 2001
2
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t
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Copyright
E
2001, TAOS Inc.
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
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
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.
NOTE 1: All voltages are with respect to GND.
Recommended Operating Conditions
MIN
MAX
UNIT
Supply voltage, V
DD
2.7
5.5
V
Operating free-air temperature, T
A
0
70
C
Electrical Characteristics at V
DD
= 5 V, T
A
= 25
C,
p
= 940 nm, R
L
= 10 k
(unless otherwise noted)
(see Notes 2, 3, and 4)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
V
D
Dark voltage
E
e
= 0
0
15
mV
V
Maximum output voltage swing
V
DD
= 4.5 V,
No Load
4.49
V
V
OM
Maximum output voltage swing
V
DD
= 4.5 V,
R
L
= 10 k
4
4.2
V
V
O
Output voltage
E
e
= 4.4
W/cm
2
1.2
2
2.8
V
VD
Temperature coefficient of dark voltage (V
D
)
T
A
= 0
C to 70
C
15
V/
C
N
e
Irradiance responsivity
See Note 5
0.45
V/(
W/cm
2
)
PSRR
Power supply rejection ratio
f
ac
= 100 Hz, see Note 6
55
dB
y
j
f
ac
= 1 kHz, see Note 6
35
dB
I
DD
Supply current
E
e
= 4.4
W/cm
2
1.9
4
mA
NOTES: 2. Measured with R
L
= 10 k
between output and ground.
3. Optical measurements are made using small-angle incident radiation from a light-emitting diode (LED) optical source.
4. The input irradiance is supplied by a GaAs light-emitting diode with the following characteristics: peak wavelength
p
= 940 nm.
5. Irradiance responsivity is characterized over the range V
O
= 0.1 V to 4.5 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.
6. Power supply rejection ratio PSRR is defined as 20 log (
V
DD
(f)/
V
O
(f)) with V
DD
(f = 0) = 5 V and V
O
(f = 0) = 2 V.
TSL267
HIGH SENSITIVITY
IR LIGHT TO VOLTAGE CONVERTER
TAOS033 OCTOBER 2001
3
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t
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E
2001, TAOS Inc.
Switching Characteristics at V
DD
= 5 V, T
A
= 25
C,
p
= 940 nm, R
L
= 10 k
(unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
t
r
Output pulse rise time, 10% to 90% of final value
See Note 7 and Figure 1
160
250
s
t
f
Output pulse fall time, 10% to 90% of final value
See Note 7 and Figure 1
150
250
s
t
s
Output settling time to 1% of final value
See Note 7 and Figure 1
330
s
Integrated noise voltage
f = dc to 1 kHz
E
e
= 0
200
Vrms
f = 10 Hz
E
e
= 0
6
V
n
Output noise voltage, rms
f = 100 Hz
E
e
= 0
6
V/
Hz rms
n
g ,
f = 1 kHz
E
e
= 0
7
NOTE 7: Switching characteristics apply over the range V
O
= 0.1 V to 4.5 V.
PARAMETER MEASUREMENT INFORMATION
VOLTAGE WAVEFORM
TEST CIRCUIT
Input
E
e
10%
90%
Output
(see Note B)
t
r
TSL267
R
L
V
DD
2
1
3
+
Output
Pulse
Generator
LED
(see Note A)
t
f
90%
10%
NOTES: A. The input irradiance is supplied by a pulsed GaAs light-emitting diode with peak wavelength:
p
= 940 nm,
t
r
< 1
s, t
f
< 1
s.
B. The output waveform is monitored on an oscilloscope with the following characteristics: t
r
< 100 ns, Z
i
1 M
, C
i
20 pF.
Figure 1. Switching Times
TSL267
HIGH SENSITIVITY
IR LIGHT TO VOLTAGE CONVERTER
TAOS033 OCTOBER 2001
4
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t
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E
2001, TAOS Inc.
TYPICAL CHARACTERISTICS
Figure 2
0.6
0
700
800
900
1000
Relative Responsivity
1.2
1100
1.0
0.8
0.4
Wavelength nm
T
A
= 25
C
0.2
1.4
1.6
PHOTODIODE SPECTRAL RESPONSIVITY
Normalized to
940 nm
Figure 3
20
0
80
60
40
10
f Frequency Hz
10
10
2
10
6
10
5
10
4
10
3
Power Supply Rejection Ratio -- dB
30
70
50
POWER SUPPLY REJECTION RATIO
vs
FREQUENCY
Figure 4
4
2
1
0
70
0
10
DARK VOLTAGE
vs
FREE-AIR TEMPERATURE
10
30
50
Dark V
oltage
mV
V
D
3
T
A
Free-Air Temperature
C
60
20
40
9
7
6
5
8
V
DD
= 5 V
Figure 5
0
NORMALIZED RESPONSE
vs
ANGULAR DISPLACEMENT
90
70
50
30
10
30
50
70
90
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
Normalized Response
10
Angular Displacement
5
TSL267
HIGH SENSITIVITY
IR LIGHT TO VOLTAGE CONVERTER
TAOS033 OCTOBER 2001
5
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t
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Copyright
E
2001, TAOS Inc.
MECHANICAL DATA
The TSL267 is implemented in a visible-light-blocking 3-leaded package with a molded focusing lens.
0.072 (1,84)
0.189 (4,80)
0.630 (16,00)
0.173 (4,40)
0.029 (0,75)
0.057 (1,44)
0.018 (0,45)
0.531 (13,50)
0.027 (0,70)
0.079 (2,00)
0.071 (1,80)
0.110 (2,80)
0.039 (1,00)
0.165 (4,20)
0.150 (3,80)
0.189 (4,80)
0.173 (4,40)
0.026 (0,65)
0.016 (0,40)
0.032 (0,80)
0.071 (1,8)
0.079 (2,00)
0.016 (0,40)
R 0.035 (0,90)
0.079 (2,00)
0.018 (0,45)
0.102 (2,6)
Figure 6. Package Configuration
NOTES: A. All linear dimensions are in inches (millimeters).
B. This drawing is subject to change without notice.
C. All dimensions apply before solder dip.
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