Datasheet TRS1766, TRS1755, TRS1722 Datasheet (TAOS)

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TRS1722, TRS1755, TRS1766

HIGH SENSITIVITY REFLECTIVE COLOR SENSOR



WITH LIGHTTOVOLTAGE CONVERTERS

TAOS034 – NOVEMBER 2002

 Converts Reflected Light Intensity to

Output Voltage

PACKAGE

(TOP VIEW)

 Integral Color LEDs and Matching Color

Filters on Sensors

 Sensor is a Monolithic Silicon IC

ANODE 1

Containing a Photodiode, Operational Amplifier, Feedback Components, and Color Filter

GND 2

 High-Output LEDs and High-Sensitivity

Sensors

 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).

4 OUT

3 V

Functional Block Diagram

LED Anode

External

Reflecting

Surface

– +

Voltage Output

The

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TRS1722, TRS1755, TRS1766 HIGH SENSITIVITY REFLECTIVE COLOR SENSOR WITH LIGHTTOVOLTAGE CONVERTERS

TAOS034 – NOVEMBER 2002

Terminal Functions

TERMINAL

NAME 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 V

3 Supply voltage

DESCRIPTION

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, T

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.

–25°C to 85°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

stg

†

Recommended Operating Conditions

MIN MAX UNIT

Supply voltage, V LED forward current 0 10 mA Operating free-air temperature, T

3 5.5 V

0 70 °C

LED

PARAMETER TEST CONDITIONS

V I P λ Wavelength If = 5 mA 630 567 468 nm BW Bandwidth If = 5 mA 40 26 26 nm

Forward voltage If = 20 mA 2.2 3 2.3 3 2.7 4 V

Reverse leakage Vr = 5 V 10 10 10 µA

Radiant flux If = 5 mA 14 5 300 µW

TRS1722 TRS1755 TRS1766

MIN TYP MAX MIN TYP MAX MIN TYP MAX

UNIT

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TRS1722, TRS1755, TRS1766

Maximum out ut voltage

HIGH SENSITIVITY REFLECTIVE COLOR SENSOR

WITH LIGHTTOVOLTAGE 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)

PARAMETER TEST CONDITIONS

PSRR Power supply rejection

Dark voltage Ee = 0 0 20 0 20 0 20 mV

Maximum output voltage

swing Temperature coefficient

of dark voltage (VD)

Irradiance responsivity

Illuminance responsivity

ratio Supply current VO = 2 V (typical) 1.9 3.5 1.9 3.5 1.9 3.5 mA

No Load 4.49 4.49 4.49 RL = 10 kΩ 4 4.2 4 4.2 4 4.2

TA = 0°C to 70°C –15 –15 –15 µV/°C

λp = 470 nm,

see Notes 4 and 7

λp = 524 nm,

see Notes 5 and 7

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

λp = 565 nm,

see Notes 7 and 8

λp = 635 nm,

see Notes 6 and 7 fac = 100 Hz, see Note 10 55 55 55 fac = 1 kHz, see Note 10 35 35 35

TRS1722 TRS1755 TRS1766

MIN TYP MAX MIN TYP MAX MIN TYP MAX

20 90 300

35 300 130

90 300 22

460 35 13

0.12 0.47 1.57

0.027 0.24 0.10

0.06 0.20 0.015

1.21 0.093 0.033

UNIT

mV/ (µW/ cm2)

V/Ix

NOTES: 2. Measured with RL = 10 kΩ between output and ground.

The

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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TRS1722, TRS1755, TRS1766

µ √

HIGH SENSITIVITY REFLECTIVE COLOR SENSOR WITH LIGHTTOVOLTAGE CONVERTERS

TAOS034 – NOVEMBER 2002

Electrical Characteristics at VDD = 5 V, TA = 25°C, RL = 10 kΩ (unless otherwise noted) (continued) Coupled (see Note 2)

PARAMETER TEST CONDITIONS

LED forward current

Output voltage

Crosstalk

VO = 2 V, d = 1 mm (Note 11)

If = 2.5 mA, d = 1 mm (Note 11)

If = 5 mA, d = 1 mm (Note 11)

If = 0.25 mA, d = 1 mm (Note 11)

If = 5 mA, no surface (see Note 12)

If = 1 mA, no surface (see Note 12)

TRS1722 TRS1755 TRS1766

MIN TYP MAX MIN TYP MAX MIN TYP MAX

0.5 2.1 4 2 5 8 0.1 0.4 1.75 mA

2.4

1.3

0 80 300 0 30 200

0 130 500

UNIT

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

trOutput pulse rise time, 10% to 90% of final value See Note 13 and Figure 1 160 250 µs tfOutput pulse fall time, 10% to 90% of final value See Note 13 and Figure 1 150 250 µs tsOutput 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

VnOutput noise voltage, rms f = 100 Hz Ee = 0 6 µV/√Hz rms

f = 1 kHz Ee = 0 7

NOTE 13: Switching characteristics apply over the range VO = 0.1 V to 4.5 V.

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PARAMETER MEASUREMENT INFORMATION

White Test Card

TRS1722, TRS1755, TRS1766

HIGH SENSITIVITY REFLECTIVE COLOR SENSOR

WITH LIGHTTOVOLTAGE CONVERTERS

TAOS034 – NOVEMBER 2002

1 mm

–

Pulse

Generator

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.

Output

(see Note B)

LED

Input

Output

90%

10%

VOLTAGE WAVEFORM

90%

10%

Figure 1. Switching Times

TYPICAL CHARACTERISTICS

DARK VOLTAGE

DETECTOR SPECTRAL RESPONSIVITY

0.9

0.8

0.7

TRS1722

TRS1755

Normalized to

TRS1722

@ 670 nm

TA = 25°C

8 7

FREE-AIR TEMPERATURE

VDD = 5 V

0.6

TRS1766

0.5

0.4

0.3

Relative Responsivity

0.2

0.1 0

300 500 700 900

The

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λ – Wavelength – nm

Figure 2

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1100

– Dark Voltage – mV

6 5

3 2

1 0

10 30 50

TA – Free-Air Temperature – °C

700

6020 40

Figure 3

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TRS1722, TRS1755, TRS1766 HIGH SENSITIVITY REFLECTIVE COLOR SENSOR WITH LIGHTTOVOLTAGE CONVERTERS

TAOS034 – NOVEMBER 2002

TYPICAL CHARACTERISTICS

TYPICAL OUTPUT VOLTAGE

vs.

LED CURRENT

Output Voltage — V

0.01 0.1 1 10

Blue

LED Current – mA

Red

Figure 4

TYPICAL NORMALIZED OUTPUT

vs.

DISTANCE

1.2

Green

TYPICAL LED VOLTAGE

vs.

LED CURRENT

Blue

2.5

1.5

LED Forward Voltage Drop — V

0.5

0.01 0.1 1 10

Green

Red

LED Current – mA

Figure 5

REFLECTIVE SENSOR LED ANGULAR

NORMALIZED EMISSION SWING

PERPENDICULAR TO LED DETECTOR AXIS

1.2

0.8

0.6

0.4

Normalized Output Voltage — V

0.2

02 46 810

Distance to Reflecting Surface – mm

Figure 6

0.8

0.6

0.4

Normalized Emission

0.2

–100 –50 0 50 100

Degrees – °

Figure 7

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HIGH SENSITIVITY REFLECTIVE COLOR SENSOR

WITH LIGHTTOVOLTAGE CONVERTERS

TYPICAL CHARACTERISTICS

TRS1722, TRS1755, TRS1766

TAOS034 – NOVEMBER 2002

REFLECTIVE SENSOR LED ANGULAR

NORMALIZED EMISSION SWING

SWING THROUGH LED DETECTOR AXIS

1.2

0.8

0.6

0.4

Normalized Emission

0.2

–100 –50 0 50 100

Degrees – °

Figure 8

REFLECTIVE SENSOR LED ANGULAR

NORMALIZED RESPONSE

1.2

0.8

0.6

0.4

Normalized Emission

0.2

–100 –50 0 50 100

Degrees – °

Figure 9

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TRS1722, TRS1755, TRS1766 HIGH SENSITIVITY REFLECTIVE COLOR SENSOR WITH LIGHTTOVOLTAGE CONVERTERS

TAOS034 – NOVEMBER 2002

MECHANICAL DATA

3.80

2.10

LED Die Height

0.25

ANODE 1

GND 2

Top

Figure 10. Device Pictorial

0.90 1.90

Bottom

4 OUT

Optical C

3 V

2X 1.04

2X 1.80

4X 0.50

Detector Die Height

0.38

1.40

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

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7.62

0.85

0.40 MIN

4X 0.15

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TRS1722, TRS1755, TRS1766

HIGH SENSITIVITY REFLECTIVE COLOR SENSOR

WITH LIGHTTOVOLTAGE 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. (T AOS) 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 RESUL T I N PERSONAL INJURY OR DE ATH. 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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TRS1722, TRS1755, TRS1766 HIGH SENSITIVITY REFLECTIVE COLOR SENSOR WITH LIGHTTOVOLTAGE CONVERTERS

TAOS034 – NOVEMBER 2002

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Datasheet TRS1766, TRS1755, TRS1722 Datasheet (TAOS)

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