TSL237T datasheet(3/13 Pages) AMSCO

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TSL237T

HIGH-SENSITIVITY

LIGHT-TO-FREQUENCY CONVERTER

TAOS055J − DECEMBER 2007

The LUMENOLOGY r Company

www.taosinc.com

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

Supply voltage, VDD (see Note 1)

6 V

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

Input voltage range, OE input, VI

−0.3 V to VDD + 0.3 V

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

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

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.

Recommended Operating Conditions

MIN

NOM

MAX

UNIT

Supply voltage, VDD

2.7

5.5

High-level input voltage, VIH

VDD = 5 V

4.5

VDD

Low-level input voltage, VIL

VDD = 5 V

0.5

Operating free-air temperature range, TA

−40

°C

Electrical Characteristics at VDD = 5 V, TA = 25°C (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VOH

High-level output voltage

IOH = −1 mA

4.7

VOL

Low-level output voltage

IOL = 1 mA

0.1

0.4

IDD

Supply current

1.6

Full-scale frequency‡

500

1000

kHz

Temperature coefficient of responsivity

Wavelength < 600nm, fO = 50 kHz

± 200

ppm/°C

kSVS

Supply-voltage sensitivity

VDD = 5 V ±10%

± 0.5

%/ V

‡ Full-scale frequency is the maximum operating frequency of the device without saturation.

Operating Characteristics at VDD = 5 V, TA = 25°C, λp = 640 nm (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Output frequency

Ee = 40.4 μW/cm2

kHz

Dark frequency

Ee = 0 μW/cm2

0.1

Dark frequency

Ee = 0 μW/cm2, TA = 50°C

Irradiance responsivity

1.2

kHz/(μW/

cm2)

Nonlinearity §

fO = 0 kHz to 10 kHz

± 1%

% F.S.

Step response to full-scale step input

1 pulse of new

frequency plus 1 μs

Time from OE low to output enabled

1 period of output

frequency

§ Nonlinearity is defined as the deviation of fO from a straight line between zero and full scale, expressed as a percent of full scale.

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