TSL238 datasheet(3/13 Pages) AMSCO

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TSL238

HIGH-SENSITIVITY

LIGHT-TO-FREQUENCY CONVERTER

TAOS073J − SEPTEMBER 2008

E 2008, TAOS Inc.

The LUMENOLOGY

r Company

www.taosinc.com

Terminal Functions

TERMINAL

NAME

D PKG

NO.

TYPE

DESCRIPTION

GND

Power supply ground. All voltages are referenced to GND.

1, 2, 3

No connection.

Substrate. Pin 4 is resistively connected to the substrate of the die, which is at the same potential as pin 6.

Pin 4 must either be connected to pin 6 or left unconnected. Pin 4 cannot be used for a ground connection

by itself.

Enable for fO (active low).

OUT

Output frequency.

VDD

Supply voltage.

Absolute Maximum Ratings over operating free-air temperature range (unless otherwise noted)†

Supply voltage, VDD (see Note 1)

6 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Input voltage range, VI

−0.3 V to VDD +0.3 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Output current, IO

± 5 mA

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Short circuit of output to ground duration

5 s

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating free-air temperature range, TA (see Note 2)

−40

°C to 85°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Storage temperature range, Tstg (see Note 2)

−40

°C to 85°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Solder conditions in accordance with JEDEC J−STD−020A, maximum temperature (see Note 3)

260

°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.

NOTES: 1. All voltage values are with respect to GND.

2. Long-term storage or operation above 70

°C could cause package yellowing that will lower the sensitivity to wavelengths < 500nm.

3. The device may be hand soldered provided that heat is applied only to the solder pad and no contact is made between the tip of

the solder iron and the device lead. The maximum time heat should be applied to the device is 5 seconds.

Recommended Operating Conditions

MIN

NOM

MAX

UNIT

Supply voltage, VDD

2.7

5.5

High-level input voltage, VIH

0.8

× V

VDD

Low-level input voltage, VIL

0.5

Operating free-air temperature range, TA

−40

°C

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