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INA118 Datasheet(PDF) 11 Page - Texas Instruments

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Part # INA118
Description  Precision, Low Power INSTRUMENTATION AMPLIFIER
PDF  16 Pages
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

INA118 Datasheet(HTML) 11 Page - Texas Instruments

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11
®
INA118
FIGURE 9. ECG Amplifier With Right-Leg Drive.
FIGURE 8. Differential Voltage to Current Converter.
A1
IB Error
OPA177
±1.5nA
OPA602
±1pA
OPA128
±75fA
FIGURE 5. Single-Supply Bridge Amplifier.
FIGURE 6. AC-Coupled Instrumentation Amplifier.
SEEBECK
ISA
COEFFICIENT
TYPE
MATERIAL
(
µV/°C)
R1, R2
E
+ Chromel
58.5
66.5k
Ω
– Constantan
J
+ Iron
50.2
76.8k
Ω
– Constantan
K
+ Chromel
39.4
97.6k
Ω
– Alumel
T
+ Copper
38.0
102k
Ω
– Constantan
FIGURE 7. Thermocouple Amplifier With Cold Junction
Compensation.
300
Ω
+3V
150
Ω
R
1
(1)
2V –
∆V
2V +
∆V
NOTE: (1) R
1 required to create proper common-mode voltage,
only for low voltage operation — see text.
3V
R
G
INA118
V
O
Ref
INA118
R
G
V
O
C
1
0.1µF
OPA602
Ref
R
1
1M
Ω
f
–3dB =
1
2
πR
1C1
= 1.59Hz
V
IN
+
–
REF102
R
2
R1
R
3
Pt100
Cu
Cu
V+
K
6
10.0V
4
2
INA118
V
O
Ref
100
Ω = RTD at 0°C
R
G
INA118
R
G
I
B
R
1
V
IN
–
+
A
1
I
O
Load
I
O =
• G
V
IN
R
1
Ref
INA118
R
G/2
V
O
LA
RL
RA
10k
Ω
Ref
G = 10
2.8k
Ω
2.8k
Ω
1/2
OPA2604
390k
Ω
390k
Ω
1/2
OPA2604



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