TSL237

HIGH-SENSITIVITY

LIGHT-TO-FREQUENCY CONVERTER

TAOS052J − SEPTEMBER 2008

4

r

r

Copyright

E 2008, TAOS Inc.

The LUMENOLOGY

r Company

www.taosinc.com

TYPICAL CHARACTERISTICS

Figure 5

OUTPUT FREQUENCY

vs.

VERTICAL ANGULAR DISPLACEMENT

Q − Angular Displacement − °

0

0.2

0.4

0.6

0.8

1.0

−90

−60

−30

0

30

60

90

-Q

+Q

Figure 6

OUTPUT FREQUENCY

vs.

HORIZONTAL ANGULAR DISPLACEMENT

Q − Angular Displacement − °

0

0.2

0.4

0.6

0.8

1.0

−90

−60

−30

0

30

60

90

-Q

+Q

Figure 7

DARK FREQUENCY

vs.

FREE-AIR TEMPERATURE

−7.5

−4.5

−1.5

1.5

4.5

7.5

−25

−5

15

35

55

75

−6.0

−3.0

0.0

3.0

6.0

NOTE A

Figure 8

λ − Wavelength of Incident Light − nm

PHOTODIODE RESPONSIVITY TEMPERATURE

COEFFICIENT

vs.

WAVELENGTH OF INCIDENT LIGHT

1k

2k

3k

4k

5k

6k

7k

8k

9k

10k

0

11k

600

650

700

750

800

850

900

950

1000

NOTE A: Internal offsets that result in dark frequency can be both positive and negative. The dashed line represents the case of negative offset

in which an equivalent amount of light signal is required to obtain a non-zero output frequency.