1998 Mar 26

3

Philips Semiconductors

Product specification

Silicon temperature sensors

KTY81-2 series

LIMITING VALUES

In accordance with the Absolute Maximum Rating System (IEC 134).

CHARACTERISTICS

Notes

1. The thermal time constant is the time taken for the sensor to reach 63.2% of the total temperature difference.

For example, if a sensor with a temperature of 25

°C is moved to an environment with an ambient temperature of

100

°C, the time for the sensor to reach a temperature of 72.4 °C is the thermal time constant.

2. Inert liquid, e.g. FC43 manufactured by the 3M company.

SYMBOL

PARAMETER

CONDITIONS

MIN.

MAX.

UNIT

continuous sensor current

−

10

mA

−

2mA

ambient operating temperature

−55

+150

°C

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

sensor resistance

KTY81-210

1980

−

2020

Ω

KTY81-220

1960

−

2040

Ω

KTY81-221

1960

−

2000

Ω

KTY81-222

2000

−

2040

Ω

KTY81-250

1900

−

2100

Ω

KTY81-251

1900

−

2000

Ω

KTY81-252

2000

−

2100

Ω

TC

temperature coefficient

−

0.79

−

%/K

resistance ratio

1.696

1.716

resistance ratio

0.490

0.500

τ

thermal time constant; note 1

in still air

−

30

−

s

in still liquid; note 2

−

5

−

s

in flowing liquid; note 2

−

3

−

s

rated temperature range

−55

−

+150

°C