TSL260, TSL261, TSL262

IR LIGHT-TO-VOLTAGE OPTICAL SENSORS

SOES008A – DECEMBER 1992 – REVISED FEBRUARY 1993

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

5–8

APPLICATION INFORMATION

NOTE A: Simple transmission of audio signal over short distances (<10 ft). Applications include wireless headphones, wireless-telephone

headset, and wireless-headset intercom.

† OPTEK part number

IN

OUT

COM

6 V

U2

TLE2426

C1

1

µF

+

R2

20 k

Ω

_

+

D1

OP295†

D2

OP295†

R3

40

Ω

Q1

2N3904

R1

10 k

Ω

Audio

Input

6 V

6 V

IN

OUT

COM

9 V

U2

TLE2426

_

+

9 V

C2

47

µF

R1

100 k

Ω

C1

100 pF

R2

10 k

Ω

IN

OUT

COM

9 V

U1

TSL261

Sensor

C3

1

µF

3

2

6

7

4

1

3

2

U3A

NE5534

U1

TLC271

2

3

7

5

4

8

1

6

TRANSMITTER

RECEIVER

+

+

VOL

Output

(to headphones)

Figure 12. IR Voice-Band Audio Link