Datasheet

INA326, INA327
13
SBOS222D
www.ti.com
FIGURE 6. Generating Output Offset Voltage.
R
1
R′
2
5
R
0
R
2
C
2
C
0
V
REF
V
O
G = 2 (R
2
|| R′
2
)/R
1
INA326
R
2
and R′
2
are chosen to
create a small output offset
voltage (e.g., 100mV).
Gain is determined by
the parallel combination
of R
2
and R′
2
.
2
1
8
3
6
FIGURE 7. Output Referenced to V
REF
/2.
2kΩ
200kΩ
200kΩ
V
REF
R
O
100Ω
5
6
2
1
8
3
C
O
1µF
C
2
INA326
A/D
Converter
G = 2(200kΩ || 200kΩ)/2kΩ = 100
FIGURE 8. High-Side Current Shunt Measurement.
INA326
+5V
R
L
5
2
1
8
3
6
7
R
O
100Ω
R
S
I
L
R
1
2kΩ
R
2
C
2
V
O
C
O
1µF
NOTE: Connection point
of V+ will include ( ) or
exclude ( ) quiescent
current in the measurement
as desired. Output offset
required for measurements
near zero (see Figure 6).
R
S
must be chosen
so that the input voltage
does not exceed 100mV
beyond the rail.
V
O
= 2(I
L
× R
S
)
R
2
R
1
APPLICATION CIRCUITS