TSL260, TSL261, TSL262

IR LIGHT-TO-VOLTAGE OPTICAL SENSORS

SOES008A – DECEMBER 1992 – REVISED FEBRUARY 1993

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

5–3

operating characteristics at TA = 25°C (see Figure 1)

PARAMETER

TEST CONDITIONS

TSL260

TSL261

TSL262

UNIT

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

MIN

TYP

MAX

MIN

TYP

MAX

UNIT

tr

Output pulse rise time

VDD = 5 V,

λp = 940 nm

360

90

7

µs

tf

Output pulse fall time

VDD = 5 V,

λp = 940 nm

360

90

7

µs

Vn

Output noise voltage

VDD = 5 V,

f = 20 Hz

0.6

0.5

0.4

µV/√Hz

PARAMETER MEASUREMENT INFORMATION

VOLTAGE WAVEFORM

TEST CIRCUIT

Input

Ee

10%

90%

Output

(see Note B)

tr

TSL26x

RL

VDD

2

1

3

+

–

Output

Pulse

Generator

IRED

(see Note A)

tf

90%

10%

NOTES: A. The input irradiance is supplied by a pulsed GaAs infrared-emitting diode with the following characteristics:

λp = 940 nm, tr < 1 µs,

tf < 1 µs.

B. The output waveform is monitored on an oscilloscope with the following characteristics: tr < 100 ns, Zi ≥ 1 MHz, Ci ≤ 20 pF.

Figure 1. Switching Times

TYPICAL CHARACTERISTICS

0.4

0

600

700

800

900

PHOTODIODE SPECTRAL RESPONSE

1

1100

0.8

0.6

0.2

λ – Wavelength – nm

TA = 25°C

0.01

0.1

1

10

100

OUTPUT VOLTAGE

vs

IRRADIANCE

0.1

1

10

Ee – Irradiance – µW/cm2

TSL260

0.5

0.9

0.7

0.3

0.1

1000

VDD = 5 V

λp = 940 nm

No Load

TA = 25°C

TSL261

TSL262

1000

Figure 2

Figure 3