CCR05CX1R0 Datasheet, PDF (8/71 Pages) AVX Corporation – Multiayer Ceramic Leaded Capacitors

The Capacitor
Impedance vs. Frequency
Effect of Capacitance – AVX SpinGuards
10.00
1.00
0.10
0.01
1
.001mF
.01mF
.1mF
.33mF
10
100
Log Frequency, MHz
1000
Impedance vs. Frequency
Effect of Dielectric – AVX DIPGuards
10.0
1.0
0.1
1
10
100 200
Log Frequency, MHz
Impedance vs. Frequency
Effect of Lead Length – Military CKR05 .01mF
100.0
10.0
.500"
.250"
.062"
0"
Typical Curve of Aging Rate
X7R Dielectric
+1.5
0
-1.5
-3.0
-4.5
-6.0
-7.5
1
10 100 1000 10,000 100,000
Hours
Figure 9
Characteristic
C0G (NP0)
X7R
Z5U
Y5V
Max. Aging Rate %/Decade
None
2
3
5
Effects of Mechanical Stress – High “K” dielectric ceramic
capacitors exhibit some low level piezoelectric reactions
under mechanical stress. As a general statement, the
piezoelectric output is higher, the higher the dielectric con-
stant of the ceramic. It is desirable to investigate this effect
before using high “K” dielectrics as coupling capacitors in
extremely low level applications.
Reliability – Historically ceramic capacitors have been one
of the most reliable types of capacitors in use today.
The approximate formula for the reliability of a ceramic
capacitor is:
where
͑ ^{Lo = Vt}
L_t
V_o
͑^X
T_t Y
T_o
L_o = operating life
T_t = test temperature and
L _t = test life
T_o = operating temperature in °C
V _t = test voltage
V_o = operating voltage X,Y = see text
1.0
Historically for ceramic capacitors exponent X has been
considered as 3. The exponent Y for temperature effects
0.1
typically tends to run about 8.
1
10
100
1000
Log Frequency, MHz
Figure 8
7