TSL220

LIGHT-TO-FREQUENCY CONVERTER

SOES003 – AUGUST 1990 – REVISED JUNE 1991

1

POST OFFICE BOX 655303

description

The TSL220 consists of a large-area photodiode and a current-to-frequency converter. The output voltage is

a pulse train and its frequency is directly proportional to the light intensity (irradiance) on the photodiode. The

integration techniques. The TSL220 is ideal for light-sensing applications requiring wide dynamic range, high

sensitivity, and high noise immunity. The output frequency range is determined by an external capacitor; hence,

the desired output frequency is adjustable for a given light intensity at the input. The TSL220 is characterized

for operation over the temperature range of – 25

°C to 70°C.

mechanical data

The photodiode and current-to-frequency converter are packaged in a clear plastic 8-pin dual-in-line package.

Location of

Photodiode

Center

PIN 8 NU

PIN 7 NU

PIN 6 C1

PIN 5 GND

PIN 4 C2

PIN 3 VCC

PIN 2 OUTPUT

PIN 1 NC

8,7 (0.343)

9,2 (0.362)

1,9 (0.075)

2,4 (0.094)

3,2 (0.126)

3,4 (0.134)

0,45 (0.018)

0,85 (0.033)

1,4 (0.055)

1,6 (0.063)

0,36 (0.014)

0,56 (0.022)

0,84 (0.033) MIN

7

TYP

90

°

105

°

Seating Plane

0,23 (0.009)

0,30 (0.012)

0,4 (0.016)

0,6 (0.024)

7,82

(0.308

6,3 (0.248)

6,5 (0.256)

1

2

3

4

8

7

56

9,5 (0.374)

MAX

7

°

TYP

8 Places

5,4 (0.213)

5,6 (0.220)

0,8 (0.031) R NOM

ALL LINEAR DIMENSIONS ARE IN MILLIMETERS AND PARENTHETICALLY IN INCHES

NC–No internal connection

C

L

NU–Not usable (leave unconnected)

2,54

(0,100

C

L

† Use of LSTTL logic families may require a 3300-

Ω pulldown resistor on the output.

Copyright

© 1991, Texas Instruments Incorporated

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.