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S-5855A

Seiko Instruments
Part Number S-5855A
Manufacturer Seiko Instruments
Description PWM OUTPUT TEMPERATURE SENSOR IC
Published Mar 7, 2016
Detailed Description S-5855A Series www.sii-ic.com © Seiko Instruments Inc., 2010-2013 PWM OUTPUT TEMPERATURE SENSOR IC Rev.1.2_00 The S-5...
Datasheet PDF File S-5855A PDF File

S-5855A
S-5855A

Overview
S-5855A Series www.
sii-ic.
com © Seiko Instruments Inc.
, 2010-2013 PWM OUTPUT TEMPERATURE SENSOR IC Rev.
1.
2_00 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 • Temperature accuracy • Duty ratio change-start temperature • Duty ratio temperature sensitivity • Low current consumption • Low power supply voltage • Wide range of operation temperature • Lead-free (Sn 100%), halogen-free : 1-wire PWM interface : ±3.
0°C : Selectable from +40°C to +80°C in 10°C step : Selectable from −1 %/°C to −4 %/°C in 1 %/°C step : 50 μA typ.
(Ta = +25°C) : 1.
65 V to 5.
5 V : Ta = −40°C to +125°C „ Application • Temperature compensation for LED instruments „ Packages • SNT-4A • SOT-23-5 Seiko Instruments Inc.
1 PWM OUTPUT TEMPERATURE SENSOR IC S-5855A Series „ Block Diagrams 1.
CMOS output product VDD *1 VSS Temperature sensor Triangle wave generator + − CF CFREQ *1.
Parasitic diode 2.
Nch open-drain output product Figure 1 VDD *1 VSS Temperature sensor Triangle wave generator + − CF CFREQ *1.
Parasitic diode Figure 2 2 Seiko Instruments Inc.
Rev.
1.
2_00 DOUT DOUT Rev.
1.
2_00 „ Product Name Structure 1.
Product name S-5855 A x x x − xxxx U PWM OUTPUT TEMPERATURE SENSOR IC S-5855A Series Environmental code U ：Lead-free (Sn 100%), halogen-free Package name (abbreviation) and packing specifications*1 I4T1 ：SNT-4A, Tape M5T1 ：SOT-23-5, Tape Output form A ：CMOS output B ：Nch open-drain output Duty ratio temperature sensitivity A ：−1 %/°C B ：−2 %/°C C ：−3 %/°C D ：−4 %/°C Duty ratio change-start temperature A ：+40°C B ：+50°C C ：+60°C D ：+7...


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