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| OPA333_15 Datasheet, PDF (14/33 Pages) Texas Instruments – 1.8-V, microPower, CMOS Operational Amplifiers, Zero-Drift Series | |||
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OPA333
OPA2333
SBOS351D â MARCH 2006 â REVISED NOVEMBER 2013
www.ti.com
R1
100 kW
RA
R2
100 kW
LL
R3
100 kW
LA
+VS
1/2
OPA2333
+VS
1/2
OPA2333
+VS
1/2
OPA2333
C1
47 pF
R6
100 kW
R7
100 kW
R8
100 kW
Wilson
VCENTRAL
(RA + LA + LL) / 3
R5
390 kW
R4
100 kW
RL
+VS
1/2
OPA2333
Inverted
VCM
R9
20 kW
+VS
1/2
OPA2333
+VS
C2
0.64 mF
R10
1 MW
1/2 VS
R11
1 MW
fLPF = 150 Hz
C4
1.06 nF
GTOT = 1 kV/V
+VS
3
7 GINA = 5
6
INA321(1)
2
1
4
5
C3
1 mF
dc
ac
+VS
R12
5 kW
R13
318 kW
1/2
OPA2333
R14
1 MW
+VS
OPA333
VOUT
GOPA = 200
fHPF = 0.5 Hz
(provides ac signal coupling)
1/2 VS
VS = +2.7 V to +5.5 V
BW = 0.5 Hz to 150 Hz
fO = 0.5 Hz
(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
14
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Product Folder Links: OPA333 OPA2333
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