AD8212 Datasheet, PDF (6/8 Pages) Analog Devices – High Voltage Current Shunt Monitor

Preliminary Technical Data
MODES OF OPERATION
The output of the AD8212 can be adjusted for unidirectional or
bidirectional operation.
LOW VOLTAGE UNIDIRECTIONAL OPERATION
Unidirectional operation allows the AD8212 to measure
currents through a resistive shunt in one direction. The offset
pin is not used and the Bias pin is directly connected to GND.
V_PLUS
I_S
R_S
1 V_PLUS
V_SENSE 8
2 COM
OFFSET 7
AD8212
3 BIAS
ALPHA 6
4 NC
IOUT 5
LOAD
R_OUT
Figure 5. Low Voltage Unidirectional Operation
LOW VOLTAGE BIIDIRECTIONAL OPERATION
By tying pin 7 (Offset) to COM the AD8212 can measure
currents in both directions at the input.
V_PLUS
I_S
R_S
1 V_PLUS
V_SENSE 8
2 COM
OFFSET 7
AD8212
3 BIAS
ALPHA 6
4 NC
IOUT 5
LOAD
R_OUT
Figure 6. Low Voltage Bidirectional Operation
AD82122
HIGH VOLTAGE UNIDIRECTIONAL OPERATION
V_PLUS
I_S
R_S
1 V_PLUS
V_SENSE 8
2 COM
OFFSET 7
AD8212
3 BIAS
ALPHA 6
4 NC
R_BIAS
IOUT 5
LOAD
R_OUT
Figure 7. High Voltage Unidirectional Operation
HIGH VOLTAGE BIDIRECTIONAL OPERATION
V_PLUS
I_S
R_S
1 V_PLUS
V_SENSE 8
2 COM
OFFSET 7
AD8212
3 BIAS
ALPHA 6
4 NC
IOUT 5
R_BIAS
LOAD
R_OUT
Figure 8.. High Voltage Unidirectional Operation
Rev. PrA | Page 6 of 8