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S5855A Datasheet(PDF) 13 Page - Seiko Instruments Inc

No. de pieza S5855A
Descripción Electrónicos  PWM OUTPUT TEMPERATURE SENSOR IC
PDF  27 Pages
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Fabricante Electrónico  SII [Seiko Instruments Inc]
Página de inicio  http://www.sii.co.jp
Logo SII - Seiko Instruments Inc

S5855A Datasheet(HTML) 13 Page - Seiko Instruments Inc

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PWM OUTPUT TEMPERATURE SENSOR IC
Rev.1.2_00
S-5855A Series
Seiko Instruments Inc.
13
Operation
1.
Duty ratio
The following equation is the definition of duty ratio.
Duty ratio = PW / T
× 100 [%]
The definitions of PW and T are shown in Figure 11.
T
PW
Figure 11
2.
Oscillation frequency
The oscillation frequency is set by the capacitance value of the capacitor CFREQ for the oscillation frequency.
The relationship between the CFREQ capacitance value of each duty ratio temperature sensitivity and the center value
of the oscillation frequency are shown in Table 11.
Table 11
Duty ratio temperature sensitivity
Ddt(s) [%/°C]
CFREQ capacitance value
[nF]
Center value of oscillation frequency
[Hz]
−1
2.2
2300
−2
4.7
2160
−3
6.8
2240
−4
10.0
2030



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