TYPICAL APPLICATIONS
V1
INA133
V+
V+
–In
A1
3
INA133
2
5
2
R2
5
7
6
6
R1
VO
R2
1
3
VO = (V+)/2
A2
V2
+In
VO = (1 + 2R2/R1) (V2 –V1)
1
4
Common
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.
FIGURE 5. Pseudoground Generator.
SIMILAR COMPLETE
A1, A2
FEATURE
BURR-BROWN IA
OPA2227
OPA129
OPA2277
OPA2130
OPA2234
OPA2237
Low Noise
INA103
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
INA116
INA133
INA114, INA128
INA121
2
5
6
V2
INA122, INA118
INA122, INA126
VO = –V2
FIGURE 3. Precision Instrumentation Amplifier.
INA133
2
5
6
1
1
3
100Ω(1)
1%
Gain Error = 0.05% maximum
Nonlinearity = 0.001% maximum
Gain Drift = 1ppm/°C
V–
V0
0 to 2V
100Ω(1)
1%
3
FIGURE 6. Precision Unity-Gain Inverting Amplifier.
IIN
0 to 20mA
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.
®
10
INA133, INA2133
BB [ BURR-BROWN CORPORATION ]
