DESCRIPTION. The LUMENOLOGY Company Texas Advanced Optoelectronic Solutions Inc. 800 Jupiter Road, Suite 205 Plano, TX (972)

Transcription

1 Converts Light Intensity to Output Voltage Integral Color Filter in Blue, Green, or Red Monolithic Silicon IC Containing Photodiode, Operational Amplifier, and Feedback Components High Sensitivity Single Voltage Supply Operation Low Noise (2 µvrms Typ to khz) Rail-to-Rail Output High Power-Supply Rejection (35 db at khz) Compact 3-Leaded Plastic Package PACKAGE (FRONT VIEW) 2 3 GND V DD 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 32 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 NO. DESCRIPTION GND Ground (substrate). All voltages are referenced to GND. OUT 3 Output voltage V DD 2 Supply voltage The LUMENOLOGY Company Texas Advanced Optoelectronic Solutions Inc. 8 Jupiter Road, Suite 25 Plano, TX 7574 (972) Copyright 22, TAOS Inc.

2 Absolute Maximum Ratings over operating free-air temperature range (unless otherwise noted) Supply voltage, V DD (see Note ) V Output current, I O ± ma Duration of short-circuit current at (or below) 25 C s Operating free-air temperature range, T A C to 85 C Storage temperature range, T stg C to 85 C Lead temperature,6 mm (/6 inch) from case for seconds 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 : All voltages are with respect to GND. Recommended Operating Conditions MIN MAX UNIT Supply voltage, V DD V Operating free-air temperature, T A 7 C Copyright 22, TAOS Inc. The LUMENOLOGY Company 2

3 Electrical Characteristics at V DD = 5 V, T A = 25 C, R L = kω (unless otherwise noted) (see Notes 2 and 3) PARAMETER TEST CONDITIONS TSLB257 TSLG257 TSLR257 MIN TYP MAX MIN TYP MAX MIN TYP MAX V D Dark voltage E e = mv V OM V O α VD R e R V Maximum output voltage V DD = 4.5 V, No Load swing V DD = 4.5 V, R L = kω Output voltage Temperature coefficient of dark voltage (V D ) Irradiance responsivity Illuminance responsivity E e =.7 µw/cm 2, λ p = 47 nm, Note 4 E e =.6 µw/cm 2, λ p = 524 nm, Note 5 E e =. µw/cm 2, λ p = 635 nm, Note UNIT V T A = C to 7 C µv/ C λ p = 47 nm, see Notes 4 and 7 λ p = 524 nm, see Notes 5 and 7 λ p =565 nm, see Notes 7 and 8 λ p = 635 nm, see Notes 6 and 7 λ p = 47 nm, see Notes 4 and 7 λ p = 524 nm, see Notes 5 and 7 λ p = 565 nm, see Notes 7 and 8 λ p = 635 nm, see Notes 6 and V/ (µw/ cm 2 ) PSRR Power supply rejection f ac = Hz, see Note ratio f ac = khz, see Note I DD Supply current V O = 2 V (typical) ma V V/Ix db NOTES: 2. Measured with R L = 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 λ p = 47 nm, spectral halfwidth λ = 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 λ p = 524 nm, spectral halfwidth λ = 47 nm, luminous efficacy = 52 lm/w. 6. The input irradiance is supplied by an AlInGaP light-emitting diode with the following characteristics: peak wavelength λ p = 635 nm, spectral halfwidth λ = 7 nm, luminous efficacy = 5 lm/w. 7. Responsivity is characterized over the range V O =. 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 =. 8. The input irradiance is supplied by a GaP light-emitting diode with the following characteristics: peak wavelength λ p = 565 nm, spectral halfwidth λ = 28 nm, luminous efficacy = 595 lm/w. 9. Illuminance responsivity R V is calculated from the irradiance responsivity by using the LED luminous efficacy values stated in Notes 4, 5, 6, and 8, and using lx = lm/m 2.. Power supply rejection ratio PSRR is defined as 2 log ( V DD (f)/ V O (f)) with V DD (f = ) = 5 V and V O (f = ) = 2 V. The LUMENOLOGY Company Copyright 22, TAOS Inc. 3

4 Switching Characteristics at V DD = 5 V, T A = 25 C, R L = kω (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT t r Output pulse rise time, % to 9% of final value See Note and Figure 6 25 µs t f Output pulse fall time, % to 9% of final value See Note and Figure 5 25 µs t s Output settling time to % of final value See Note and Figure 33 µs Integrated noise voltage f = dc to khz E e = 2 µvrms f = Hz E e = 6 V n Output noise voltage, rms f = Hz E e = 6 µv/ Hz rms NOTE : Switching characteristics apply over the range V O =. V to 4.5 V. f = khz E e = 7 Pulse Generator LED (see Note A) PARAMETER MEASUREMENT INFORMATION TSLx257 TEST CIRCUIT + V DD 2 3 R L Output Input E e Output (see Note B) % 9% t r VOLTAGE WAVEFORM NOTES: A. The input irradiance is supplied by a pulsed light-emitting diode with the following characteristics: t r < µs, t f < µs. B. The output waveform is monitored on an oscilloscope with the following characteristics: t r < ns, Z i MΩ, C i 2 pf. Figure. Switching Times 9% % t f Copyright 22, TAOS Inc. The LUMENOLOGY Company 4

5 TYPICAL CHARACTERISTICS Relative Responsivity PHOTODIODE SPECTRAL RESPONSIVITY TSLG257 TSLB257 TSLR257 Normalized to 67 nm T A = 25 C Relative Responsivity PHOTODIODE SPECTRAL RESPONSIVITY WITH EXTERNAL HOYA CM5 FILTER TSLG257 Normalized to.9 54 nm TSLB257 TSLR257 T A = 25 C λ Wavelength nm λ Wavelength nm Figure 2 Figure 3 9 V DD = 5 V DARK VOLTAGE vs FREE-AIR TEMPERATURE..9 NORMALIZED RESPONSE vs ANGULAR DISPLACEMENT 8.8 V D Dark Voltage mv Normalized Response T A Free-Air Temperature C Angular Displacement Figure 4 Figure 5 The LUMENOLOGY Company Copyright 22, TAOS Inc. 5

6 MECHANICAL DATA The TSLx257 is implemented in a clear 3-leaded package with a molded focusing lens..89 (4,8).73 (4,4).65 (4,2).5 (3,8).7 (,8).72 (,84).57 (,44).32 (,8).6 (,4) R.35 (,9). (2,8).7 (,8).6 (,4).89 (4,8).73 (4,4).79 (2,).29 (,75).39 (,).2 (2,6).27 (,7).26 (,65).63 (6,).53 (3,5).8 (,45).79 (2,).79 (2,) Figure 6. Package Configuration.8 (,45) 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. D. Package body is a clear nonfilled optically transparent material E. Index of refraction of clear plastic is.55. Copyright 22, TAOS Inc. The LUMENOLOGY Company 6

7 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 22, TAOS Inc. 7

8 Copyright 22, TAOS Inc. The LUMENOLOGY Company 8