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Seiko Instruments Electronic Components Datasheet


S-5855A

PWM OUTPUT TEMPERATURE SENSOR IC


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S-5855A pdf
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



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S-5855A pdf
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



Part Number S-5855A
Description PWM OUTPUT TEMPERATURE SENSOR IC
Maker Seiko Instruments - Seiko Instruments
Total Page 27 Pages
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