TSL261

t TSL260, TSL261, TSL262 IR LIGHT TO VOLTAGE OPTICAL SENSORS t TAOS021 – MAY 2000 D Integral Visible Light Cutoff Filter D Monolithic Silicon IC Containing D D D D D D D 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 PACKAGE (FRONT VIEW) 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 GND OUT VDD NO. 1 3 2 Output voltage Supply voltage DESCRIPTION Ground (substrate). All voltages are referenced to GND. www.taosinc.com Texas Advanced Optoelectronic Solutions Inc. 800 Jupiter Road, Suite 205 S Plano, TX 75074 S (972) 673-0759 t t Copyright E 2000, TAOS Inc. 1 TSL260, TSL261, TSL262 IR LIGHT TO VOLTAGE 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 Supply voltage, VDD Operating free-air temperature, TA 3 0 NOM 5 MAX 9 70 UNIT V °C Electrical Characteristics at VDD = 5 V, TA = 25°C, λp = 940 nm, RL = 10 kΩ (unless otherwise noted) (see Note 3) PARAMETER VDARK VOM VO Dark voltage Maximum output TEST CONDITIONS Ee = 0 Ee = 2.6 mW/cm2 Ee = 48 µW/cm2 Out ut voltage Output voltage Ee = 87 µW/cm2 Ee = 525 µW/cm2 Ee = 48 µW/cm2, TA = 0°C to 70°C Temperature coefficient of out ut voltage (VO) output voltage (V Ee = 87 µW/cm2, TA = 0°C to 70°C Ee = 525 µW/cm2, TA = 0°C to 70°C Ne Irradiance responsivity See Note 4 Ee = 48 No load TSL260 MIN 3.1 1 TYP 3 3.5 2 3 1 MAX 10 3.1 MIN TSL261 TYP 3 3.5 2 3 1 MAX 10 3.1 MIN TSL262 TYP 3 3.5 MAX 10 UNIT mV V V 2 3 ±1 ±1 ±1 42 900 1600 900 1600 900 1600 µA 23 3.8 mV/(µW/cm2) mV/°C µW/cm2, IDD Supply current Ee = 87 µW/cm2, No load Ee = 525 No load µW/cm2, 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 tr tf Vn Output pulse rise time Output pulse fall time Output noise voltage TEST CONDITIONS VDD = 5 V, VDD = 5 V, VDD = 5 V, λp = 940 nm λp = 940 nm f = 20 Hz MIN TYP 360 360 0.6 MAX MIN TSL261 TYP 90 90 0.5 MAX MIN TSL262 TYP 7 7 0.4 MAX UNIT µs µs µV/√Hz Copyright E 2000, TAOS Inc. t www.taosinc.com 2 t TSL260, TSL261, TSL262 IR LIGHT TO VOLTAGE OPTICAL SENSORS TAOS021 – MAY 2000 PARAMETER MEASUREMENT INFORMATION VDD Pulse Generator IRED (see Note A) TSL26x 1 TEST CIRCUIT – + RL Output (see Note B) 10% 90% 90% 10% 2 Ee Input 3 Output tr tf VOLTAGE WAVEFORM 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 10 VDD = 5 V λp = 940 nm No Load TA = 25°C 1 TSL261 1 0.9 0.8 Relative Responsivity TSL260 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 0 600 700 800 900 1000 λ – Wavelength – nm 1100 PHOTODIODE SPECTRAL RESPONSE TA = 25°C VO – Output Voltage – V TSL262 0.1 Figure 2 Figure 3 www.taosinc.com t Copyright E 2000, TAOS Inc. t 3 TSL260, TSL261, TSL262 IR LIGHT TO VOLTAGE OPTICAL SENSORS TAOS021 – MAY 2000 TYPICAL CHARACTERISTICS HIGH-LEVEL OUTPUT VOLTAGE vs SUPPLY VOLTAGE 9 VOM – Maximum Output Voltage – V 8 7 6 Ee = 2.6 λp = 940 nm RL = 10 kΩ TA = 25°C mW/cm2 0.8 I DD – Supply Current – mA 1 SUPPLY CURRENT vs OUTPUT VOLTAGE 0.6 5 4 0.4 0.2 3 2 4 5 6 7 8 VDD – Supply Voltage – V 9 10 VDD = 5 V No Load (RL = ∞) TA = 25°C 0 1 2 3 VO – Output Voltage – V 4 0 Figure 4 NORMALIZED OUTPUT VOLTAGE vs ANGULAR DISPLACEMENT 1 Figure 5 0.8 Normalized Output Voltage TSL260 TSL261, 262 0.6 0.4 0.2 0 80° 60° 40° 20° 0° 20° 40° θ – Angular Displacement Optical Axis 60° 80° Figure 6 Copyright E 2000, TAOS Inc. t www.taosinc.com 4 t TSL260, TSL261, TSL262 IR LIGHT TO VOLTAGE OPTICAL SENSORS TAOS021 – MAY 2000 APPLICATION INFORMATION VDD 2 TSL26x Sensor 1 3 RP = 100 kΩ Output 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 4.7 kΩ 100 Ω 5V OP240† 2 TSL261 Sensor 1 3 50-kΩ Threshold 10 kΩ 2 8 4 LM393 15 kΩ 15 kΩ – 1 Output 3+ 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 www.taosinc.com t Copyright E 2000, TAOS Inc. t 5 TSL260, TSL261, TSL262 IR LIGHT TO VOLTAGE OPTICAL SENSORS TAOS021 – MAY 2000 APPLICATION INFORMATION 5V 5V BN301† 27 kΩ 7 3 kΩ 6 TLC555 2 1 0.01 µF 3 2N3906 2 4 8 TSL262 Sensor 1 TLC372 18 Ω 100 kΩ 15-kΩ Threshold 3 0.01 µF 50 kΩ 2 – 5V 8 4 1 Output 4.7 kΩ 5V 3+ 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 100 Ω 0.01 µF 2 OP295† or BN301‡ Light Shield TSL260 Sensor 1 10 kΩ 6 2N3904 2 0.1 µF 1 µF + 3 0.1 µF 5 3 4 6V 560 kΩ 1 kΩ 8 270 kΩ 0.1 µF NE567 1 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 E 2000, TAOS Inc. t www.taosinc.com 6 t TSL260, TSL261, TSL262 IR LIGHT TO VOLTAGE OPTICAL SENSORS TAOS021 – MAY 2000 APPLICATION INFORMATION S1 9V R3 22 Ω R1 680 Ω 7 6 2 + C1 1 µF 8 4 3 2 R2 1 kΩ 5 1 3 Q1 2N3904 1 D1 BN301† To Sensor U1 TLC555 TRANSMITTER 6V 2 IN U4 TSL260 Sensor OUT COM 1 J1 3 C5 0.1 µF 6V 6V R8 300 Ω 1 R5 7.5 kΩ 3 5 6 Freq Trim R6 4.7 kΩ C2 0.1 µF 2 7 + C3 1 µF C4 4.7 µF + 4 1 16 2 PRE J 5 VCC 3 CLR U2 NE567 4 8 6V R7 4.7 kΩ 2 TIL3010 4 1 3 U3 6 2 Q2 TIC225C AC Load R4 180 Ω 1 2 3 120 V 60 Hz 1 U5 1/2 SN74HC76 CLK Q 15 R9 1 kΩ Q3 2N3904 K GND 13 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 www.taosinc.com t Copyright E 2000, TAOS Inc. t 7 TSL260, TSL261, TSL262 IR LIGHT TO VOLTAGE OPTICAL SENSORS TAOS021 – MAY 2000 APPLICATION INFORMATION 6V 6V D1 OP295† IN U2 TLE2426 OUT COM 3 + Audio Input C1 1 µF R1 10 kΩ 7 + 6V U1 TLC271 5 6 1 8 4 R2 20 kΩ R3 40 Ω Q1 2N3904 D2 OP295† 2_ TRANSMITTER 9V 2 IN U1 TSL261 Sensor OUT COM 1 9V R2 10 kΩ 3 + C3 1 µF VOL C1 100 pF IN U2 TLE2426 OUT COM 2 3 _ + 9V 7 6 R1 100 kΩ + C2 47 µF U3A 4 NE5534 Output (to headphones) RECEIVER † OPTEK part number NOTE A: Simple transmission of audio signal over short distances (