Datasheet

Data Sheet AD8213
Rev. C | Page 13 of 16
BIDIRECTIONAL CURRENT SENSING
The AD8213 can also be configured to sense current in both
directions at the inputs. This configuration is useful in charge/
discharge applications. A typical connection diagram is shown
in Figure 31. In this mode Channel 1 monitors I
LOAD
and
Channel 2 monitors I
CHARGE
.
1
2
3
4
–IN2
+IN2
GND
OUT2
CF2
5
10
9
8
7
–IN1
+IN1
V+
OUT1
CF1
6
AD8213
CF2 CF1
5V
LOAD CHARGER
BATTERY
R
SHUNT
I
LOAD
I
CHARGE
06639-034
Figure 31. Bidirectional Current Sensing
For applications requiring a bidirectional current measurement,
an optimal solution could be to use a single channel device,
which offers the same functionality as the previous circuit. The
AD8210 is a single channel current sensor featuring bidirec-
tional capability. The typical connection diagram for the
AD8210 in bidirectional applications is shown in Figure 32.
LOAD CHARGER
BATTERY
R
SHUNT
0.1µF
AD8210
OUTPUT
G = +20
+IN –IN
V+
V
REF
1
V
REF
2
GND
06639-035
I
LOAD
I
CHARGE
Figure 32. AD8210 in Bidirectional Applications