Data Sheet
APPLICATIONS INFORMATION
COMMON-MODE TRANSIENT IMMUNITY
In general, common-mode transients consist of linear and
sinusoidal components. The linear component of a common-
mode transient is given by
V CM, linear = ( ΔV / Δt ) t
where ΔV / Δt is the slope of the transient shown in Figure 12
and Figure 13.
The transient of the linear component is given by
dV CM / dt = ΔV / Δt
The ability of the ADuM1233 to operate correctly in the
presence of linear transients is characterized by the data in
Figure 9. The data is based on design simulation and is the
ADuM1233
The transient magnitude of the sinusoidal component is given by
dV CM / dt = 2π f V 0
The ability of the ADuM1233 to operate correctly in the presence
of sinusoidal transients is characterized by the data in Figure 10
and Figure 11. The data is based on design simulation and is the
maximum sinusoidal transient magnitude (2πf V 0 ) that the
ADuM1233 can tolerate without an operational error. Values
for immunity against sinusoidal transients are not included in
Table 6 because measurements to obtain such values have not
been possible.
300
250
maximum linear transient magnitude that the ADuM1233 can
tolerate without an operational error. This data shows a higher
level of robustness than what is listed in Table 6 because the
transient immunity values obtained in Table 6 use measured
data and apply allowances for measurement error and margin.
400
350
200
150
100
50
BEST-CASE PROCESS VARIATION
300
BEST-CASE PROCESS VARIATION
0
WORST-CASE PROCESS VARIATION
0
250
500
750
1000
1250
1500
1750
2000
250
200
150
100
50
0
WORST-CASE PROCESS VARIATION
250
200
FREQUENCY (MHz)
Figure 10. Transient Immunity (Sinusoidal Transients),
27°C Ambient Temperature
BEST-CASE PROCESS VARIATION
–40
–20
0
20
40
60
80
100
150
TEMPERATURE (°C)
Figure 9. Transient Immunity (Linear Transients) vs. Temperature
100
The sinusoidal component (at a given frequency) is given by
V CM, sinusoidal = V 0 sin(2π ft )
50
where:
V 0 is the magnitude of the sinusoidal.
f is the frequency of the sinusoidal.
0
0
250
WORST-CASE PROCESS VARIATION
500 750 1000 1250 1500
FREQUENCY (MHz)
1750
2000
Figure 11. Transient Immunity (Sinusoidal Transients),
100°C Ambient Temperature
Rev. C | Page 9 of 12
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