INA111_07 BURR-BROWN [Burr-Brown Corporation], INA111_07 Datasheet - Page 11

• Manufacturer Part Number: INA111_07
• Description: High Speed FET-Input INSTRUMENTATION AMPLIFIER
• Manufacturer: BURR-BROWN [Burr-Brown Corporation]

FIGURE 11. AC-Coupled Instrumentation Amplifier.
FIGURE 14. Multiplexed-Input Data Acquisition System.
FIGURE 13. Shield Driver Circuit.
V
+
–
IN
NOTE: Driving the shield minimizes CMR degradation
due to unequally distributed capacitance on the input
line. The shield is driven at approximately 1V below
the common-mode input voltage.
R
G
Channel 1
Channel 8
INA111
Ref
V
V
IN
IN
0.1µF
OPA602
C
+
–
+
–
1
V
V
IN
IN
+
–
1M
R
1
V
O
f
MPC800
–3dB
MUX
=
= 1.59Hz
2 R
1
1
C
1
R
G
100
11
FIGURE 12. Voltage Controlled Current Source.
OPA602
10k
INA111
V
R
Make G
IN
1
Ref
22.1k
22.1k
For G = 100
R
effective R
OPA177
G
10 where G = 1 + 50k
= 511 // 2(22.1k )
Ref
INA111
G
50nF
= 505
511
C
ADS574
1
+5V
INA111
R
G
INA111
Ref
R
G
12 Bits
Out
Load
R
V
2
O
I
L
=
G R
V
IN
2
®