TRS1722, TRS1755, TRS1766 HIGH SENSITIVITY REFLECTIVE COLOR SENSOR WITH LIGHTTOVOLTAGE CONVERTERS TAOS034 – NOVEMBER 2002 Converts Reflected Light Intensity to PACKAGE (TOP VIEW) Output Voltage Integral Color LEDs and Matching Color Filters on Sensors Sensor is a Monolithic Silicon IC Containing a Photodiode, Operational Amplifier, Feedback Components, and Color Filter High-Output LEDs and High-Sensitivity Sensors ANODE 1 4 OUT GND 2 3 VDD Single Voltage Supply Operation Surface-Mount Package Description The TRS1722, TRS1755, and TRS1766 are high-sensitivity reflective color sensors in red (630 nm), green (567 nm), and blue (470 nm) — respectively — with light-to-voltage converters. Each device consists of a colored LED light source, a photodiode light sensor with matching optical color filter, a transimpedance amplifier, and on-board signal conditioning. Output voltage is directly proportional to the reflected light intensity on the photodiode plus any ambient light (which may be considered noise). Functional Block Diagram External Reflecting Surface ÇÇÇÇ ÇÇÇÇ LED Anode – + The LUMENOLOGY Company Voltage Output Copyright 2002, TAOS Inc. Texas Advanced Optoelectronic Solutions Inc. 800 Jupiter Road, Suite 205 Plano, TX 75074 (972) 673-0759 www.taosinc.com 1 TRS1722, TRS1755, TRS1766 HIGH SENSITIVITY REFLECTIVE COLOR SENSOR WITH LIGHTTOVOLTAGE CONVERTERS TAOS034 – NOVEMBER 2002 Terminal Functions TERMINAL NAME DESCRIPTION NO. GND 2 Ground. LED cathode and sensor ground. All voltages are referenced to GND. ANODE 1 LED anode drive input OUT 4 Output voltage VDD 3 Supply voltage Absolute Maximum Ratings over operating free-air temperature range (unless otherwise noted)† Supply voltage, VDD (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 V Output current, IO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±10 mA Duration of short-circuit current at (or below) 25°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 s LED DC forward current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 mA LED peak forward current (5% duty cycle @ 1 kHz or more) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 mA LED junction temperature, LED TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125°C Operating free-air temperature range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –25°C to 85°C Storage temperature range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –25°C to 85°C Lead temperature in solder contact zone 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 Supply voltage, VDD 3 5.5 UNIT V LED forward current 0 10 mA Operating free-air temperature, TA 0 70 °C LED TRS1722 PARAMETER TEST CONDITIONS MIN TYP MAX MIN TYP 3 2.3 TRS1766 MAX TYP UNIT Forward voltage If = 20 mA Reverse leakage Vr = 5 V Po Radiant flux If = 5 mA 14 5 300 µW λ Wavelength If = 5 mA 630 567 468 nm BW Bandwidth If = 5 mA 40 26 26 nm 10 4 V 10 µA The LUMENOLOGY Company 2 2.7 MAX Ir 10 3 MIN Vf Copyright 2002, TAOS Inc. 2.2 TRS1755 www.taosinc.com TRS1722, TRS1755, TRS1766 HIGH SENSITIVITY REFLECTIVE COLOR SENSOR WITH LIGHTTOVOLTAGE CONVERTERS TAOS034 – NOVEMBER 2002 Electrical Characteristics at VDD = 5 V, TA = 25°C, RL = 10 kΩ (unless otherwise noted) (continued) Detector (see Notes 2 and 3) TRS1722 PARAMETER TEST CONDITIONS VD Dark voltage Ee = 0 No Load VOM Maximum out output ut voltage swing αVD Temperature coefficient of dark voltage (VD) Re RV PSRR IDD Irradiance responsivity Illuminance responsivity MIN TYP 0 TRS1755 MAX MIN 20 0 TYP 4.49 RL = 10 kΩ 4 TRS1766 MAX MIN 20 0 4.49 4.2 4 TYP MAX 20 UNIT mV 4.49 4.2 4 V 4.2 TA = 0°C to 70°C –15 –15 –15 λp = 470 nm, see Notes 4 and 7 20 90 300 λp = 524 nm, see Notes 5 and 7 35 300 130 λp =565 nm, see Notes 7 and 8 90 300 22 λp = 635 nm, see Notes 6 and 7 460 35 13 λp = 470 nm, see Notes 4 and 7 0.12 0.47 1.57 λp = 524 nm, see Notes 5 and 7 0.027 0.24 0.10 λp = 565 nm, see Notes 7 and 8 0.06 0.20 0.015 λp = 635 nm, see Notes 6 and 7 1.21 0.093 0.033 µV/°C mV/ (µW/ cm2) V/Ix Power supply y rejection j ratio fac = 100 Hz, see Note 10 55 55 55 fac = 1 kHz, see Note 10 35 35 35 Supply current VO = 2 V (typical) 1.9 3.5 1.9 3.5 1.9 dB 3.5 mA NOTES: 2. Measured with RL = 10 kΩ 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 an InGaN light-emitting diode with the following characteristics: peak wavelength λp = 470 nm, spectral halfwidth ∆λ½ = 35 nm, luminous efficacy = 75 lm/W. 5. The input irradiance is supplied by an InGaN light-emitting diode with the following characteristics: peak wavelength λp = 524 nm, spectral halfwidth ∆λ½ = 47 nm, luminous efficacy = 520 lm/W. 6. The input irradiance is supplied by an AlInGaP light-emitting diode with the following characteristics: peak wavelength λp = 635 nm, spectral halfwidth ∆λ½ = 17 nm, luminous efficacy = 150 lm/W. 7. Responsivity is characterized over the range VO = 0.1 V to 4.5 V. The best-fit straight line of Output Voltage VO versus Irradiance Ee over this range will typically have a positive extrapolated VO value for Ee = 0. 8. The input irradiance is supplied by a GaP light-emitting diode with the following characteristics: peak wavelength λp = 565 nm, spectral halfwidth ∆λ½ = 28 nm, luminous efficacy = 595 lm/W. 9. Illuminance responsivity RV is calculated from the irradiance responsivity by using the LED luminous efficacy values stated in Notes 4, 5, 6, and 8, and using 1 lx = 1 lm/m2. 10. Power supply rejection ratio PSRR is defined as 20 log (∆VDD(f)/∆VO(f)) with VDD(f = 0) = 5 V and VO(f = 0) = 2 V. The LUMENOLOGY Company Copyright 2002, TAOS Inc. www.taosinc.com 3 TRS1722, TRS1755, TRS1766 HIGH SENSITIVITY REFLECTIVE COLOR SENSOR WITH LIGHTTOVOLTAGE CONVERTERS TAOS034 – NOVEMBER 2002 Electrical Characteristics at VDD = 5 V, TA = 25°C, RL = 10 kΩ (unless otherwise noted) (continued) Coupled (see Note 2) TRS1722 PARAMETER IF LED forward current TEST CONDITIONS VO = 2 V, d = 1 mm (Note 11) MAX MIN TYP MAX MIN TYP MAX 0.5 2.1 4 2 5 8 0.1 0.4 1.75 V 1.3 If = 5 mA, no surface (see Note 12) Crosstalk mA 2 If = 0.25 mA, d = 1 mm (Note 11) Vox UNIT 2.4 If = 5 mA, d = 1 mm (Note 11) Output voltage TRS1766 TYP If = 2.5 mA, d = 1 mm (Note 11) VO TRS1755 MIN 0 80 300 0 30 200 mV If = 1 mA, no surface (see Note 12) 0 130 500 NOTES: 11. Measured using Eastman Kodak neutral white test card having 90% diffuse reflectance located a distance from the front surface of the reflective sensors. Reference: Eastman Kodak catalog number #1257795. 12. Crosstalk is the output voltage measured with the indicated current on the LED and with no reflecting surface. Ambient light is excluded with a black box approximately 20 cm in each dimension. Switching Characteristics at VDD = 5 V, TA = 25°C, RL = 10 kΩ (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT tr Output pulse rise time, 10% to 90% of final value See Note 13 and Figure 1 160 250 µs tf Output pulse fall time, 10% to 90% of final value See Note 13 and Figure 1 150 250 µs ts Output settling time to 1% of final value See Note 13 and Figure 1 330 µs Integrated noise voltage f = dc to 1 kHz Ee = 0 200 µVrms f = 10 Hz Ee = 0 6 f = 100 Hz Ee = 0 6 f = 1 kHz Ee = 0 7 Vn Output noise voltage, g , rms µV/√Hz µ √ rms NOTE 13: Switching characteristics apply over the range VO = 0.1 V to 4.5 V. Copyright 2002, TAOS Inc. The LUMENOLOGY Company 4 www.taosinc.com TRS1722, TRS1755, TRS1766 HIGH SENSITIVITY REFLECTIVE COLOR SENSOR WITH LIGHTTOVOLTAGE CONVERTERS TAOS034 – NOVEMBER 2002 PARAMETER MEASUREMENT INFORMATION ÇÇÇÇ White Test Card 1 mm LED 1 Input – 4 tf tr Output + Pulse Generator RL 90% 90% 3 2 Output (see Note B) VDD 10% 10% VOLTAGE WAVEFORM TEST CIRCUIT NOTES: A. The input irradiance is supplied by pulsing the LED with a white test card positioned 1 mm from the face of the device. B. The output waveform is monitored on an oscilloscope with the following characteristics: tr < 100 ns, Zi ≥ 1 MΩ, Ci ≤ 20 pF. C. The pulse generator output drive is adjusted until the sensor output voltage reaches 2 volts. Figure 1. Switching Times TYPICAL CHARACTERISTICS DARK VOLTAGE vs FREE-AIR TEMPERATURE DETECTOR SPECTRAL RESPONSIVITY 1 0.9 10 Normalized to TRS1722 @ 670 nm TRS1722 0.8 Relative Responsivity 0.7 0.6 0.5 TRS1766 0.4 0.3 8 V D– Dark Voltage – mV TA = 25°C TRS1755 7 6 5 4 3 0.2 2 0.1 1 0 300 VDD = 5 V 9 0 500 700 900 λ – Wavelength – nm 1100 0 10 20 Figure 2 The LUMENOLOGY Company 30 40 50 60 70 TA – Free-Air Temperature – °C Figure 3 Copyright 2002, TAOS Inc. www.taosinc.com 5 TRS1722, TRS1755, TRS1766 HIGH SENSITIVITY REFLECTIVE COLOR SENSOR WITH LIGHTTOVOLTAGE CONVERTERS TAOS034 – NOVEMBER 2002 TYPICAL CHARACTERISTICS TYPICAL OUTPUT VOLTAGE vs. LED CURRENT TYPICAL LED VOLTAGE vs. LED CURRENT 6 3 5 2.5 Output Voltage — V Blue LED Forward Voltage Drop — V Blue Red 4 3 2 1 2 Green Red 1.5 1 0.5 Green 0 0.01 0.1 1 0 0.01 10 LED Current – mA 0.1 Figure 4 REFLECTIVE SENSOR LED ANGULAR NORMALIZED EMISSION SWING PERPENDICULAR TO LED DETECTOR AXIS 1.2 1.2 1 1 Normalized Emission Normalized Output Voltage — VO 10 Figure 5 TYPICAL NORMALIZED OUTPUT vs. DISTANCE 0.8 0.6 0.4 0.2 0.8 0.6 0.4 0.2 0 0 2 4 6 8 10 0 –100 –50 Figure 6 Copyright 2002, TAOS Inc. 0 50 100 Degrees – ° Distance to Reflecting Surface – mm Figure 7 The LUMENOLOGY Company 6 1 LED Current – mA www.taosinc.com TRS1722, TRS1755, TRS1766 HIGH SENSITIVITY REFLECTIVE COLOR SENSOR WITH LIGHTTOVOLTAGE CONVERTERS TAOS034 – NOVEMBER 2002 TYPICAL CHARACTERISTICS REFLECTIVE SENSOR LED ANGULAR NORMALIZED RESPONSE 1.2 1.2 1 1 Normalized Emission Normalized Emission REFLECTIVE SENSOR LED ANGULAR NORMALIZED EMISSION SWING SWING THROUGH LED DETECTOR AXIS 0.8 0.6 0.4 0.6 0.4 0.2 0.2 0 –100 0.8 –50 0 50 100 0 –100 –50 0 Degrees – ° Degrees – ° Figure 8 Figure 9 The LUMENOLOGY Company 50 100 Copyright 2002, TAOS Inc. www.taosinc.com 7 TRS1722, TRS1755, TRS1766 HIGH SENSITIVITY REFLECTIVE COLOR SENSOR WITH LIGHTTOVOLTAGE CONVERTERS TAOS034 – NOVEMBER 2002 MECHANICAL DATA Bottom Top Figure 10. Device Pictorial 5 ANODE 1 4 OUT 2X 1.04 Optical CL 3.80 2X 1.80 GND 2 3 VDD 2.10 4X 0.50 0.90 1.90 LED Die Height 0.25 Detector Die Height 0.38 6 0.85 1.40 0.40 MIN 7.62 4X 0.15 NOTES: A. All linear dimensions are in millimeters. B. Tolerances: die placement: ± 0.2, plastic package: ± 0.4, leads: ± 0.8. C. This drawing is subject to change without notice. Figure 11. Package Configuration Copyright 2002, TAOS Inc. The LUMENOLOGY Company 8 www.taosinc.com TRS1722, TRS1755, TRS1766 HIGH SENSITIVITY REFLECTIVE COLOR SENSOR WITH LIGHTTOVOLTAGE CONVERTERS TAOS034 – NOVEMBER 2002 PRODUCTION DATA — information in this document is current at publication date. Products conform to specifications in accordance with the terms of Texas Advanced Optoelectronic Solutions, Inc. standard warranty. Production processing does not necessarily include testing of all parameters. 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. LUMENOLOGY is a registered trademark, and TAOS, the TAOS logo, and Texas Advanced Optoelectronic Solutions are trademarks of Texas Advanced Optoelectronic Solutions Incorporated. The LUMENOLOGY Company Copyright 2002, TAOS Inc. www.taosinc.com 9 TRS1722, TRS1755, TRS1766 HIGH SENSITIVITY REFLECTIVE COLOR SENSOR WITH LIGHTTOVOLTAGE CONVERTERS TAOS034 – NOVEMBER 2002 Copyright 2002, TAOS Inc. The LUMENOLOGY Company 10 www.taosinc.com