Datasheet

G =G +
ERRTOT ERR
R
2
R
IN
R
IN
R
2
R
1
L1
L2
AMC1100
SBAS562 –APRIL 2012 www.ti.com
VOLTAGE MEASUREMENT
The AMC1100 can also be used for isolated voltage measurement applications, as shown in a simplified way in
Figure 34. In such applications, usually a resistor divider (R
1
and R
2
in Figure 34) is used to match the relatively
small input voltage range of the AMC1100. R
2
and the AMC1100 input resistance (R
IN
) also create a resistance
divider that results in additional gain error. With the assumption that R
1
and R
IN
have a considerably higher value
than R
2
, the resulting total gain error can be estimated using Equation 1:
Where G
ERR
= device gain error.
(1)
Figure 34. Voltage Measurement Application
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