Datasheet

11
®
INA148
FIGURE 6. Quasi-AC-Coupled Differential Amplifier.
FIGURE 7. Single-Supply Differential Amplifier.
FIGURE 8. Battery Monitor Circuit.
1MΩ 50kΩ
52.6316kΩ
50kΩ
2.7778kΩ
1MΩ
–V
S
V
IN
4
3
2
6
A1
INA148
V
O
+
V
IN
–
0.22µF
1
V
REF
+V
S
–V
S
+V
S
7
U2:
OPA132 for V
S
= ±5V to ±15V
OPA340 for V
S
= ±2.5
1MΩ
U1
f
C
≅ 0.75 Hz HPF
2
3
U2
4
7
6
V
O
= (V
IN
– V
IN
) + V
REF
–+
1MΩ 50kΩ
52.6316kΩ
50kΩ
2.7778kΩ
1MΩ
V
IN
3
2
6
41
A1
INA148
V
O
+5V
+
V
IN
–
7
0.1µF+5V
V
CM
= –23V to +56V
V
O
= (V
IN
– V
IN
) + 1.235V
REF1004-1.2
10µF
5Ω
34kΩ
+–
+
1MΩ 50kΩ
52.6316kΩ
50kΩ
2.7778kΩ
1MΩ
3
2
6
1
A1
INA148
REF1004-1.2
10µF
5Ω
7
0.1µF
4
0.01Ω
+
+
–
28V
Supply
I
C
271kΩ
V
O
= 1.235V + (I
C
• R
S
)
R
S