BUF634 inside feedback
loop contributes no error.
INA132
V1
2
3
5
6
INA132
–In
+In
–In
A1
R2
2
5
BUF634
VO
6
RL
R1
1
(Low IQ mode)
VO
R2
1
3
A2
FIGURE 4. Low Power, High Output Current Precision
Difference Amplifier.
V2
+In
VO = (1 + 2R2/R1) (V2 –V1)
The INA132 can be combined with op amps to form a complete instru-
mentation amplifier with specialized performance characteristics. Burr-
Brown offers many complete high performance IAs. Products with related
performances are shown at the right.
V+
V+
3
INA132
2
SIMILIAR COMPLETE
A1, A2
FEATURE
BURR-BROWN IA
5
7
6
OPA27
Low Noise
INA103
INA116
INA114,INA128
INA111
OPA129
OPA177
OPA2130
OPA2234
Ultra Low Bias Current (fA)
Low Offset Drift, Low Noise
Low Power, FET-Input (pA)
Single Supply, Precision,
Low Power
(V+)/2
INA122(1), INA118
OPA2237
Single Supply, Low Power,
MSOP-8
INA122(1), INA126(1)
NOTE: (1) Available 1Q’97.
1
4
Ground
Ground
FIGURE 3. Precision Instrumentation Amplifier.
FIGURE 5. Pseudoground Generator.
+5V
7
INA132
2
5
6
1
–In
12 Bits
ADS7806
Out
0V-4V
Input
3
+In
4
VCM = 0V to 8V
τS = 45µs (4V Step to 0.01%)
FIGURE 6. Differential Input Data Acquisition.
®
8
INA132
TI [ TEXAS INSTRUMENTS ]
