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TSLB257, TSLG257, TSLR257 HIGH SENSITIVITY COLOR LIGHT TO VOLTAGE CONVERTERS
TAOS027B – MARCH 2002
D Converts Light Intensity to Output Voltage D Integral Color Filter in Blue, Green, or Red D Monolithic Silicon IC Containing D D D D D D
Photodiode, Operational Amplifier, and Feedback Components High Sensitivity Single Voltage Supply Operation Low Noise (200 µVrms Typ to 1 kHz) Rail-to-Rail Output High Power-Supply Rejection (35 dB at 1 kHz) Compact 3-Leaded Plastic Package
PACKAGE (FRONT VIEW)
1
2
3
GND VDD
OUT
Description
The TSLB257, TSLG257, and TSLR257 are high-sensitivity low-noise light-to-voltage optical converters that incorporate onboard blue, green, and red optical filters, respectively. These devices combine a photodiode and a transimpedance amplifier on a single monolithic CMOS integrated circuit with a color filter over the photodiode. Output voltage is directly proportional to light intensity (irradiance) on the photodiode. Each device has a transimpedance gain of 320 MΩ with improved offset voltage stability and low power consumption, and is supplied in a 3-lead clear plastic sidelooker package with an integral lens. These devices are ideal for applications such as colorimetry, printing process control, display color correction, and selectively ambient light detection or rejection.
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.
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TSLB257, TSLG257, TSLR257 HIGH SENSITIVITY COLOR LIGHT TO VOLTAGE CONVERTERS
TAOS027B – MARCH 2002
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 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.
NOTE 1: All voltages are with respect to GND.
Recommended Operating Conditions
MIN Supply voltage, VDD Operating free-air temperature, TA 2.7 0 MAX 5.5 70 UNIT V °C
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TSLB257, TSLG257, TSLR257 HIGH SENSITIVITY COLOR LIGHT TO VOLTAGE CONVERTERS
TAOS027B – MARCH 2002
Electrical Characteristics at VDD = 5 V, TA = 25°C, RL = 10 kΩ (unless otherwise noted) (see Notes 2 and 3)
TSLB257 PARAMETER VD VOM Dark voltage Maximum out ut voltage output voltage swing TEST CONDITIONS Ee = 0 VDD = 4.5 V, No Load VDD = 4.5 V, RL = 10 kΩ Ee = 1.7 µW/cm2, λp = 470 nm, Note 4 VO Output voltage Ee = 1.6 µW/cm2, λp = 524 nm, Note 5 Ee = 1.1 µW/cm2, λp = 635 nm, Note 6 αVD Temperature coefficient of dark voltage (VD) TA = 0°C to 70°C λp = 470 nm, see Notes 4 and 7 λp = 524 nm, see Notes 5 and 7 Re Irradiance responsivity λp =565 nm, see Notes 7 and 8 λp = 635 nm, see Notes 6 and 7 λp = 470 nm, see Notes 4 and 7 λp = 524 nm, see Notes 5 and 7 RV Illuminance responsivity λp = 565 nm, see Notes 7 and 8 λp = 635 nm, see Notes 6 and 7 PSRR IDD Power supply rejection yj ratio Supply current fac = 100 Hz, see Note 10 fac = 1 kHz, see Note 10 VO = 2 V (typical) –15 1.18 0.53 0.09 0.05 1.57 0.10 0.015 0.033 55 35 1.9 3.5 –15 0.35 1.25 1.17 0.14 0.47 0.24 0.20 0.093 55 35 1.9 3.5 4 1.3 MIN 0 4.49 4.2 2 2.7 1.3 2 2.7 1.3 2 –15 0.09 0.14 0.36 1.82 0.12 0.027 V/Ix 0.06 1.21 55 35 1.9 3.5 dB mA V/ (µW/ cm2) 2.7 µV/°C V 4 TYP MAX 15 MIN 0 4.49 4.2 4 TSLG257 TYP MAX 15 MIN 0 4.49 4.2 V TSLR257 TYP MAX 15 UNIT mV
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.
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TSLB257, TSLG257, TSLR257 HIGH SENSITIVITY COLOR LIGHT TO VOLTAGE CONVERTERS
TAOS027B – MARCH 2002
Switching Characteristics at VDD = 5 V, TA = 25°C, RL = 10 kΩ (unless otherwise noted)
PARAMETER tr tf ts Output pulse rise time, 10% to 90% of final value Output pulse fall time, 10% to 90% of final value Output settling time to 1% of final value Integrated noise voltage TEST CONDITIONS See Note 11 and Figure 1 See Note 11 and Figure 1 See Note 11 and Figure 1 f = dc to 1 kHz f = 10 Hz Vn Output noise voltage, rms g, f = 100 Hz f = 1 kHz NOTE 11: Switching characteristics apply over the range VO = 0.1 V to 4.5 V. Ee = 0 Ee = 0 Ee = 0 Ee = 0 MIN TYP 160 150 330 200 6 6 7 µV/√Hz rms MAX 250 250 UNIT µs µs µs µVrms
PARAMETER MEASUREMENT INFORMATION
VDD Pulse Generator LED (see Note A) TSLx257 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 light-emitting diode with the following characteristics: 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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TSLB257, TSLG257, TSLR257 HIGH SENSITIVITY COLOR LIGHT TO VOLTAGE CONVERTERS
TAOS027B – MARCH 2002
TYPICAL CHARACTERISTICS
PHOTODIODE SPECTRAL RESPONSIVITY
1 0.9 0.8
TSLG257 TSLR257
PHOTODIODE SPECTRAL RESPONSIVITY WITH EXTERNAL HOYA CM500 FILTER
1
TSLG257
Normalized to TSLR257 @ 670 nm TA = 25°C Relative Responsivity
0.9 0.8
TSLB257 TSLR257
Normalized to TSLG257 @ 540 nm TA = 25°C
Relative Responsivity
0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 300
TSLB257
0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 300
500
700 900 λ – Wavelength – nm
1100
500
700 900 λ – Wavelength – nm
1100
Figure 2
Figure 3
DARK VOLTAGE vs FREE-AIR TEMPERATURE
10 9 8 V D– Dark Voltage – mV 7 6 5 4 3 2 1 0 0 10 20 30 40 50 60 TA – Free-Air Temperature – °C 70 Normalized Response VDD = 5 V 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 –90 –70
NORMALIZED RESPONSE vs ANGULAR DISPLACEMENT
–50
–30 –10 10 30 50 Angular Displacement – 5
70
90
Figure 4
Figure 5
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TSLB257, TSLG257, TSLR257 HIGH SENSITIVITY COLOR LIGHT TO VOLTAGE CONVERTERS
TAOS027B – MARCH 2002
MECHANICAL DATA
The TSLx257 is implemented in a clear 3-leaded package with a molded focusing lens.
0.072 (1,84) 0.057 (1,44) 0.032 (0,80) 0.016 (0,40) R 0.035 (0,90) 0.071 (1,8) 0.110 (2,80) 0.189 (4,80) 0.173 (4,40)
0.189 (4,80) 0.173 (4,40) 0.165 (4,20) 0.150 (3,80) 0.071 (1,80)
0.016 (0,40)
0.079 (2,00) 0.039 (1,00)
0.029 (0,75) 0.102 (2,6)
0.027 (0,70)
0.026 (0,65) 0.630 (16,00) 0.531 (13,50)
0.018 (0,45)
0.079 (2,00) 0.079 (2,00)
0.018 (0,45)
Figure 6. Package Configuration
NOTES: A. B. C. D. E. All linear dimensions are in inches (millimeters). This drawing is subject to change without notice. All dimensions apply before solder dip. Package body is a clear nonfilled optically transparent material Index of refraction of clear plastic is 1.55.
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TSLB257, TSLG257, TSLR257 HIGH SENSITIVITY COLOR LIGHT TO VOLTAGE CONVERTERS
TAOS027B – MARCH 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.
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TAOS027B – MARCH 2002
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