71M6521 Demo Board User’s Manual
Page: 30 of 111
© 2005-2009 TERIDIAN Semiconductor Corporation
Revision 2.18
Resolving for R
R
, we get:
R
R
= (
VMAX
/ N) / 177mV = (600V / 30) / 177mV = 170.45
This divider ratio can be implemented, for example, with a combination of one 16.95k
Ω
and one 100
Ω
resistor.
1.8.4 CONNECTING DEMO BOARDS TO A SHUNT RESISTOR
Most Demo Kits are shipped with a pre-wired shunt resistor (400µ
Ω
), as shown in Figure 1-7.
Figure 1-7: Pre-Wired Shunt Resistor
For proper operation and accuracy, the wiring instructions given in section 1.8.5 have to be observed. With
proper shunt wiring, very accurate measurements can be achieved. The load line shown in
obtained using a 400µ
Ω
shunt resistor connected to a D6521T4A8 Demo Board.
Figure 1-8: Load Line with Shunt Resistor
from
NEUTRAL
to LOAD
to IA_IN
to IA
reference
to meter
power
supply
to VA
reference
-2
-1.5
-1
-0.5
0
0.5
1
1.5
2
0.1
1
10
100
1000
e
rro
r [
%
]
I [A]
Error