ADM3053

Data Sheet

Rev. A | Page 16 of 20

Bipolar ac voltage is the most stringent environment. A 50 year

operating lifetime under the bipolar ac condition determines

the Analog Devices recommended maximum working voltage.

In the case of unipolar ac or dc voltage, the stress on the insulation

is significantly lower. This allows operation at higher working

voltages while still achieving a 50 year service life. The working

voltages listed in Table 5 can be applied while maintaining the

50 year minimum lifetime, provided the voltage conforms to either

the unipolar ac or dc voltage cases. Any cross insulation voltage

waveform that does not conform to Figure 30 or Figure 31 should

be treated as a bipolar ac waveform, and its peak voltage should

be limited to the 50-year lifetime voltage value listed in Table 5.

0V

RATED PEAK VOLTAGE

Figure 29. Bipolar AC Waveform

0V

RATED PEAK VOLTAGE

Figure 30. DC Waveform

0V

RATED PEAK VOLTAGE

NOTES

1. THE VOLTAGE IS SHOWN AS SINUSODIAL FOR ILLUSTRATION

PURPOSES ONLY. IT IS MEANT TO REPRESENT ANY VOLTAGE

WAVEFORM VARYING BETWEEN 0 AND SOME LIMITING VALUE.

THE LIMITING VALUE CAN BE POSITIVE OR NEGATIVE, BUT THE

VOLTAGE CANNOT CROSS 0V.

Figure 31. Unipolar AC Waveform