TAOS TRS1766, TRS1755, TRS1722 Datasheet



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

DD

Functional Block Diagram

LED
Anode

External

Reflecting

Surface

–
+

Voltage
Output

The

LUMENOLOGY

 Company

Texas Advanced Optoelectronic Solutions Inc.



800 Jupiter Road, Suite 205  Plano, TX 75074  [phone]

www.taosinc.com



Copyright  2002, TAOS Inc.

1

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

DD

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

DD

A

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

f

Reverse leakage Vr = 5 V 10 10 10 µA

r

Radiant flux If = 5 mA 14 5 300 µW

o

TRS1722 TRS1755 TRS1766

MIN TYP MAX MIN TYP MAX MIN TYP MAX

UNIT

Copyright  2002, TAOS Inc.

2



www.taosinc.com

The

LUMENOLOGY



 Company

TRS1722, TRS1755, TRS1766

Maximum out ut voltage

yj

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

V

V

α

R

R

PSRR Power supply rejection

I

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

D

Maximum output voltage

OM

swing
Temperature coefficient

VD

of dark voltage (VD)

Irradiance responsivity

e

Illuminance responsivity

V

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

DD

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

V

mV/
(µW/
cm2)

V/Ix

dB

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.

LUMENOLOGY

 Company



Copyright  2002, TAOS Inc.

www.taosinc.com



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