Datasheet

R
1
100kW
1/2
OPA2378
RA
Inverted
V
CM
+V
S
INA321
(1)
+VS
V
OUT
+V
S
+V
S
+V
S
OPA378
+V
S
1/2V
S
dc
3
2
1
4
5
6
G =1kV/V
TOT
G =5
INA
G =200
OPA
f =150Hz
LPF
f =0.5Hz
HPF
(providesacsignalcoupling)
V =+2.7Vto+5.5V
S
BW=0.5Hzto150Hz
f =0.5Hz
O
Wilson
V
CENTRAL
(RA+LA+LL)/3
7
ac
1/2V
S
R
2
100kW
1/2
OPA2378
LL
+V
S
R
3
100kW
1/2
OPA2378
LA
R
4
100kW
R
9
20kW
R
6
100kW
RL
+V
S
+V
S
1/2
OPA2378
1/2
OPA2378
1/2
OPA2378
C
4
1.06nF
C
3
1 Fm
R
14
1MW
R
12
5kW
R
13
318kW
R
7
100kW
R
8
100kW
R
10
1MW
C
2
0.64 Fm
R
11
1MW
C
1
47pF
R
5
390kW
OPA378
OPA2378
SBOS417D –JANUARY 2008–REVISED OCTOBER 2009 www.ti.com
(1) Other instrumentation amplifiers can be used, such as the INA326, which has lower noise but higher quiescent current.
Figure 37. Single-Supply, Very Low Power ECG Circuit
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