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| OPA2333AIDGKR Datasheet, PDF (11/28 Pages) Texas Instruments – 1.8V, microPOWER CMOS OPERATIONAL AMPLIFIERS Zero-Drift Series | |||
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www.ti.com
OPA333
OPA2333
SBOS351C â MARCH 2006 â REVISED MAY 2007
1MW
3V
1MW
60kW
100kW
NTC
Thermistor OPA333
Figure 24. Thermistor Measurement
V1
-In
OPA333
INA152
2
5
R2
R1
R2
6
VO
3
1
OPA333
V2
+In
VO = (1 + 2R2/R1) (V2 - V1)
Figure 25. Precision Instrumentation Amplifier
R1
100kW
RA
R2
100kW
LL
R3
100kW
LA
+VS
1/2
OPA2333
+VS
1/2
OPA2333
+VS
1/2
OPA2333
C1
47pF
R6
100kW
R7
100kW
R8
100kW
Wilson
VCENTRAL
(RA + LA + LL)/3
R5
390kW
R4
100kW
RL
+VS
1/2
OPA2333
Inverted
VCM
R9
20kW
+VS
1/2
OPA2333
+VS
C2
0.64mF
R10
1MW
1/2 VS
R11
1MW
fO = 0.5Hz
fLPF = 150Hz
C4
1.06nF
GTOT = 1kV/V
+VS
3
7 GINA = 5
6
INA321(1)
2
1
4
5
C3
1mF
dc
ac
+VS
R12
5kW
R13
318kW
1/2
OPA2333
R14
1MW
+VS
OPA333
VOUT
GOPA = 200
fHPF = 0.5Hz
(provides ac signal coupling)
1/2 VS
VS = +2.7V to +5.5V
BW = 0.5Hz to 150Hz
NOTE: (1) Other instrumentation amplifiers can be used,
such as the INA326, which has lower noise,
but higher quiescent current.
Figure 26. Single-Supply, Very Low Power, ECG Circuit
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