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NCD2400M Datasheet(PDF) 6 Page - IXYS Corporation

Part No. NCD2400M
Description  Wide Capacitance Range, Non-volatile Digital Programmable Capacitor
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Maker  IXYS [IXYS Corporation]
Homepage  http://www.ixys.com
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NCD2400M Datasheet(HTML) 6 Page - IXYS Corporation

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INTEGRATED CIRCUITS DIVISION
NCD2400M
6
www.ixysic.com
R01
2. Performance Data
Note: The performance data shown in the graphs below is the measured performance at ambient temperature.
The typical shunt and series capacitance, in pF, varies as indicated in the following equations:
Where Code = 0 to 511.
Other performance aspects of the programmable capacitor are illustrated in the graphs below.
Figure 1: Shunt and Series Capacitance vs. Code
In shunt configuration, the parasitic capacitance from pin CP to GND adds up to the total equivalent capacitance of
the device. The expected values are the ones defined by the above equation. In series configuration, though, this
parasitic capacitor is not part of the equivalent impedance of the device, therefore the overall capacitance seen
between CP and CN is smaller.
C
shunt
12.5
0.355
Code
+
=
C
series
1.7
0.376
Code
+
=
C
OUT
C
0
C
var
+
=
Code
0
100
200
300
400
500
600
0
50
100
150
200
Capacitance vs. State
(f=10MHz)
C
series
C
shunt


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