S-5855A Series

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PWM OUTPUT TEMPERATURE SENSOR IC

© Seiko Instruments Inc., 2010-2013

Seiko Instruments Inc.

1

The S-5855A Series, developed by CMOS technology, is a 1-wire PWM output temperature sensor IC of low current

consumption that itself changes the duty ratio according to temperature.

The duty ratio decreases from 100% if exceeding the temperature set by user, and this decrease is linear against the

temperature rise.

The output form is selectable from CMOS output and Nch open-drain output.

Its small packages SNT-4A and SOT-23-5 enable high-density mounting.

Features

• PWM output

: 1-wire PWM interface

• Temperature accuracy

:

±3.0°C

• Duty ratio change-start temperature

: Selectable from

+40°C to +80°C in 10°C step

• Duty ratio temperature sensitivity

: Selectable from

−1 %/°C to −4 %/°C in 1 %/°C step

• Low current consumption

: 50

μA typ. (Ta = +25°C)

• Low power supply voltage

: 1.65 V to 5.5 V

• Wide range of operation temperature

: Ta =

−40°C to +125°C

• Lead-free (Sn 100%), halogen-free

Application

• Temperature compensation for LED instruments

Packages

• SNT-4A

• SOT-23-5