TYPICAL APPLICATIONS
V
1
INA133
–In
A
1
2
R
2
5
V+
3
INA133
2
V+
R
1
R
2
3
V
2
+In
A
2
V
O
= (1 + 2R
2
/R
1
) (V
2
–V
1
)
6
V
O
1
5
7
6
V
O
= (V+)/2
Common
The INA133 can be combined with op amps to form a complete instrumenta-
tion amplifier with specialized performance characteristics. Burr-Brown offers
many complete high performance IAs. Products with related performances
are shown at the right in the table below.
1
4
Common
FIGURE 5. Pseudoground Generator.
A
1
, A
2
OPA2227
OPA129
OPA2277
OPA2130
OPA2234
OPA2237
FEATURE
Low Noise
Ultra Low Bias Current (fA)
Low Offset Drift, Low Noise
Low Power, FET-Input (pA)
Single Supply, Precision, Low Power
Single Supply, Low Power, MSOP-8
SIMILAR COMPLETE
BURR-BROWN IA
INA103
INA116
INA114, INA128
INA121
INA122, INA118
INA122, INA126
6
V
O
= –V
2
V
2
2
INA133
5
FIGURE 3. Precision Instrumentation Amplifier.
INA133
2
100Ω
(1)
1%
V–
100Ω
(1)
1%
3
I
IN
0 to 20mA
5
1
6
V
0
0 to 2V
1
3
Gain Error = 0.05% maximum
Nonlinearity = 0.001% maximum
Gain Drift = 1ppm/°C
FIGURE 6. Precision Unity-Gain Inverting Amplifier.
NOTE: (1) Input series resistors should be less than
250Ω (1% max mismatch) to maintain excellent CMR.
With 100Ω resistors, gain error is increased to 0.5%.
FIGURE 4. Current Receiver with Compliance to Rails.
®
INA133, INA2133
10
BURR-BROWN [ BURR-BROWN CORPORATION ]
