ADuM7234
APPLICATIONS INFORMATION
Figure 9 and Figure 10 characterize the ability of the ADuM7234
to operate correctly in the presence of sinusoidal transients.
The data is based on design simulation and is the maximum
sinusoidal transient magnitude (2πf V0) that the ADuM7234
can tolerate without an operational error. Values for immunity
against sinusoidal transients are not included in Table 4 because
measurements to obtain such values have not been possible.
250
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
VCM, linear = (ΔV/Δt)t
where ΔV/Δt is the slope of the transient shown in Figure 11
and Figure 12.
The transient of the linear component is given by
200
150
dVCM/dt = ΔV/Δt
Figure 8 characterizes the ability of the ADuM7234 to operate
correctly in the presence of linear transients. The data, based on
design simulation, is the maximum linear transient magnitude
that the ADuM7234 can tolerate without an operational error.
This data shows a correlation with the data that is listed in
Table 4, which is based on measured data.
BEST-CASE PROCESS VARIATION
WORST-CASE PROCESS VARIATION
100
50
0
50
45
40
35
30
25
0
250
500
750
1000
1250
1500
1750
2000
FREQUENCY (MHz)
Figure 9. Transient Immunity (Sinusoidal Transients),
27°C Ambient Temperature
250
200
150
100
50
20
BEST-CASE PROCESS VARIATION
15
WORST-CASE PROCESS VARIATION
10
5
0
BEST-CASE PROCESS VARIATION
WORST-CASE PROCESS VARIATION
–40
–20
0
20
40
60
80
100
TEMPERATURE (°C)
Figure 8. Transient Immunity (Linear Transients) vs. Temperature
The sinusoidal component (at a given frequency) is given by
V
CM, sinusoidal = V0sin(2πft)
0
where:
0
250
500
750
1000
1250
1500
1750
2000
FREQUENCY (MHz)
V0 is the magnitude of the sinusoidal.
f is the frequency of the sinusoidal.
Figure 10. Transient Immunity (Sinusoidal Transients),
100°C Ambient Temperature
The transient magnitude of the sinusoidal component is given by
dVCM/dt = 2πf V0
Rev. A | Page 8 of 12