TSL260, TSL261, TSL262 IR LIGHTTOVOLTAGE OPTICAL SENSORS
TAOS021 – MAY 2000
Integral Visible Light Cutoff Filter Monolithic Silicon IC Containing
PACKAGE (FRONT VIEW)
Photodiode, Operational Amplifier, and Feedback Components Converts Light Intensity to Output Voltage High Irradiance Responsivity Typically 42 mV/(µW/cm2) at λp = 940 nm (TSL260) Low Dark (Offset) Voltage . . . 10 mV Max at 25°C, VDD = 5 V Single-Supply Operation Wide Supply Voltage Range . . . 3 V to 9 V Low Supply Current . . . 800 µA Typical at VDD = 5 V Advanced Linear CMOS Technology
1
2
3
GND VDD
OUT
Description The TSL260, TSL261, and TSL262 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 integrated circuit. The output voltage is directly proportional to the infrared light intensity (irradiance) on the photodiode. The TSL260, TSL261, and TSL262 are manufactured using advanced linear CMOS silicon-gate technology, which provides good 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 2000, TAOS Inc.
Texas Advanced Optoelectronic Solutions Inc. 800 Jupiter Road, Suite 205 Plano, TX 75074 (972) 673-0759
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TSL260, TSL261, TSL262 IR LIGHTTOVOLTAGE OPTICAL SENSORS TAOS021 – MAY 2000
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –25°C to 85°C Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 240°C NOTES: 1. All voltages are with respect to GND. 2. Output may be shorted to either supply.
Recommended Operating Conditions MIN
NOM
MAX
Supply voltage, VDD
3
5
9
UNIT V
Operating free-air temperature, TA
0
70
°C
Electrical Characteristics at VDD = 5 V, TA = 25°C, λp = 940 nm, RL = 10 kΩ (unless otherwise noted) (see Note 3) TEST CONDITIONS
PARAMETER VDARK
Dark voltage
Ee = 0
VOM
Maximum output
Ee = 2.6 mW/cm2
TSL260 TYP
MAX
3
10
3.1
3.5
1
2
Ee = 48 µW/cm2 VO
TSL261
MIN
TYP
MAX
3
10
3.1
3.5
1
2
MIN
TYP
MAX
3
10
3.1
3.5
1
2
Temperature coefficient of out output ut voltage (VO)
Irradiance responsivity
±1
mV/°C
Ee = 48 No load
IDD
Supply current
±1 42
µW/cm2,
900
23
mV/(µW/cm2)
3.8
1600
Ee = 87 µW/cm2,
900
No load
Ee = 525 No load
3
±1
Ee = 87 µW/cm2, TA = 0°C to 70°C
See Note 4
V
V
Ee = 525 µW/cm2, TA = 0°C to 70°C Ne
mV
3
Ee = 525 µW/cm2 Ee = 48 µW/cm2, TA = 0°C to 70°C
UNIT
3
Ee = 87 µW/cm2
Output Out ut voltage
TSL262
MIN
µA
1600
µW/cm2,
900
1600
NOTES: 3. The input irradiance Ee is supplied by a GaAs infrared-emitting diode with λp = 940 nm. 4. Irradiance responsivity is characterized over the range VO = 0.05 to 3 V.
Operating Characteristics at TA = 25°C (see Figure 1) TSL260 PARAMETER
TEST CONDITIONS
MIN
TYP
TSL261 MAX
MIN
TYP
TSL262 MAX
MIN
TYP
MAX
UNIT
tr
Output pulse rise time
VDD = 5 V,
λp = 940 nm
360
90
7
µs
tf
Output pulse fall time
VDD = 5 V,
λp = 940 nm
360
90
7
µs
Vn
Output noise voltage
VDD = 5 V,
f = 20 Hz
0.6
0.5
0.4
Copyright 2000, TAOS Inc.
2
µV/√Hz
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TSL260, TSL261, TSL262 IR LIGHTTOVOLTAGE OPTICAL SENSORS TAOS021 – MAY 2000
PARAMETER MEASUREMENT INFORMATION VDD Pulse Generator
Ee
2
Input –
IRED (see Note A)
3
tf
tr
Output
+ 90%
RL
TSL26x 1
Output (see Note B)
10%
90% 10%
VOLTAGE WAVEFORM
TEST CIRCUIT
NOTES: A. The input irradiance is supplied by a pulsed GaAs infrared-emitting diode with the following characteristics: λp = 940 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 MHz, Ci ≤ 20 pF.
Figure 1. Switching Times
TYPICAL CHARACTERISTICS OUTPUT VOLTAGE vs IRRADIANCE
PHOTODIODE SPECTRAL RESPONSE 1
VDD = 5 V λp = 940 nm No Load TA = 25°C
0.9
TSL261
TA = 25°C
0.8 TSL260
Relative Responsivity
VO – Output Voltage – V
10
1
TSL262 0.1
0.7 0.6 0.5 0.4 0.3 0.2 0.1
0.01 0.1
1 10 100 Ee – Irradiance – µW/cm2
1000
0 600
700
Figure 2
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800 900 1000 λ – Wavelength – nm
1100
Figure 3
Copyright 2000, TAOS Inc.
3
TSL260, TSL261, TSL262 IR LIGHTTOVOLTAGE OPTICAL SENSORS TAOS021 – MAY 2000
TYPICAL CHARACTERISTICS SUPPLY CURRENT vs OUTPUT VOLTAGE
HIGH-LEVEL OUTPUT VOLTAGE vs SUPPLY VOLTAGE 1
9 Ee = 2.6 λp = 940 nm RL = 10 kΩ TA = 25°C
8
0.8 I DD – Supply Current – mA
VOM – Maximum Output Voltage – V
mW/cm2
7 6
5 4
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
0
10
0
1
2 3 VO – Output Voltage – V
Figure 4
4
Figure 5 NORMALIZED OUTPUT VOLTAGE vs ANGULAR DISPLACEMENT 1
TSL260 TSL261, 262 0.6
Optical Axis
Normalized Output Voltage
0.8
0.4
0.2
0 80°
60°
40° 20° 0° 20° 40° θ – Angular Displacement
60°
80°
Figure 6
Copyright 2000, TAOS Inc.
4
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TSL260, TSL261, TSL262 IR LIGHTTOVOLTAGE OPTICAL SENSORS TAOS021 – MAY 2000
APPLICATION INFORMATION VDD
2
RP = 100 kΩ 3
TSL26x Sensor
Output
1
NOTE A: Pullup resistor extends linear output range to near VDD with minimal (several millivolts typical) effect on VDARK; particularly useful at low VDD (3 V to 5 V).
Figure 7. Pullup for Increased VOM 5V 5V
100 Ω
2
5V TSL261 Sensor
OP240†
4.7 kΩ
50-kΩ Threshold 3
10 kΩ
2
–
8
1 Output
3 + 4
1 LM393 15 kΩ 15 kΩ †
OPTEK part number NOTE A: Output goes high when beam is interrupted; working distance is several inches or less. Intended for use as optical-interrupter switch or reflective-object sensor.
Figure 8. Short-Range Optical Switch With Hysteresis
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TSL260, TSL261, TSL262 IR LIGHTTOVOLTAGE OPTICAL SENSORS TAOS021 – MAY 2000
APPLICATION INFORMATION 5V
5V 5V BN301† 2
27 kΩ
4 7
3 kΩ
50 kΩ
8 TSL262 Sensor
3
6 TLC555
2N3906
2
3
2
5V –
8
1 Output
3 +
0.01 µF
4.7 kΩ
4
1 TLC372
1
18 Ω
0.01 µF
100 kΩ 15-kΩ Threshold
†
Stanley part number NOTE A: Output pulses low until beam is interrupted. Useful range is 1 ft to 20 ft; can be extended with lenses. This configuration is suited for object detection, safety guards, security systems, and automatic doors.
Figure 9. Pulsed Optical-Beam Interrupter
6V
100 Ω
560 kΩ 0.01 µF 2
OP295† or BN301‡
TSL260 Sensor Light Shield
4 3
1 kΩ
3
8
0.1 µF
1
NE567
5
1
270 kΩ 0.1 µF
10 kΩ 6 2N3904 2 0.1 µF
1 µF
+
7
+
4.7 µF
†
OPTEK part number Stanley part number NOTE A: Output goes low when light pulses from emitter are reflected back to sensor. Range is 6 in to 18 in depending upon object reflectance. Useful for automatic doors, annunciators, object avoidance in robotics, automatic faucets, and security systems. ‡
Figure 10. Proximity Detector
Copyright 2000, TAOS Inc.
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TSL260, TSL261, TSL262 IR LIGHTTOVOLTAGE OPTICAL SENSORS TAOS021 – MAY 2000
APPLICATION INFORMATION S1 R3 22 Ω
9V
R1 680 Ω
8
4
7 6
3
2 Q1 2N3904
R2 1 kΩ
U1 TLC555
2 +
D1 BN301†
3
To Sensor
1
5
C1 1 µF
1
TRANSMITTER 6V 2 IN U4 TSL260 Sensor OUT
J1
C5 0.1 µF
COM 1
R4 180 Ω
R8 300 Ω
6V
3
R5 7.5 kΩ
R6 4.7 kΩ C2 0.1 µF
U2 NE567
1
120 V 60 Hz
2 Q2 TIC225C
2
8
5 6
Freq Trim
R7 4.7 kΩ
1
6
U3
1 4
3
AC Load
6V
3
2
4
TIL3010
1
3
6V
2 7 +
C3 1 µF
2 C4 4.7 µF
+
4
PRE J
VCC
3 CLR
U5 1/2 SN74HC76 CLK Q
1 16
5
K
15 R9 1 kΩ
GND 13
Q3 2N3904
RECEIVER †
OPTEK part number
NOTE A: Single-channel remote control can be used to switch logic or light dc loads by way of U5 or ac loads by way of the optocoupler and triac as shown. Applications include ceiling fans, lamps, electric heaters, etc.
Figure 11. IR Remote Control
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Copyright 2000, TAOS Inc.
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TSL260, TSL261, TSL262 IR LIGHTTOVOLTAGE OPTICAL SENSORS TAOS021 – MAY 2000
APPLICATION INFORMATION 6V
6V
D1 OP295†
IN U2 TLE2426
D2 OP295†
6V
OUT
U1 TLC271
COM 7
3 + Audio Input
5
+
6
2 _
1 8
R1 10 kΩ
C1 1 µF
Q1 2N3904
4 R3 40 Ω
R2 20 kΩ
TRANSMITTER 9V 2 IN U1 TSL261 Sensor OUT COM
3 +
1 9V
R2 10 kΩ
C3 1 µF
C1 100 pF
VOL
9V
IN 2
U2 TLE2426
_
R1 100 kΩ
7 6
3
OUT COM
+
U3A 4 NE5534
+ C2 47 µF
Output (to headphones)
RECEIVER †
OPTEK part number NOTE A: Simple transmission of audio signal over short distances (
