Datasheet

12ISO120/121
FIGURE 9. Right-Leg Driven ECG Amplifier (with defibrillator protection and calibration).
2
1
+
–
23
21
24
2
3
10
11
22
0.001µF
+V
S1
8
6
10
9
ISO
120
INA110
415 16
+V
S1
–V
SI
+V
S2
–V
S2
13
14
1
7
200kΩ
200kΩ
0.005 Power Resistor
120Vrms
100A
3θ Y-Connected Power Transformer
C
1
–V
S1
912
V
OUT
C
2
C
1
= 1000pF
C
2
= 1000pF
Differential input accurately senses power resistor voltage.
Two resistors protect INA110 from open power resistor.
High frequency spike reject filter has f
CO
= 400Hz.
FIGURE 8. Isolated Powerline Monitor.
15
4
7
5
6
14
+
–
37
40
38
39
1
2
21
22
18
19
20
23
24
4
3
PWS 726A
32
29
1 4
1
0.3
14 16
20kΩ
20pF
–V
S1
+V
S2
20µH
+V
S1
+V
S1
–V
S1
–V
S2
+V
S2
C
2
C
1
Calibration Signal
5.00V
0V
1/2W
300kΩ
50kΩ
1/2W
300kΩ 50kΩ
1/2W
300kΩ
180kΩ
Calibration
On
Left Arm
On
Right Arm
Calibration
Right Leg
NE2H
NE2H
NE2H
(2)
500pF
500pF
200pF
7
4
3
2
–V
S1
+V
S1
–V
S1
+V
S1
–V
S1
+V
S1
+V
S1
12
0.0082
(1)
0.0082
–V
S1
9
8
10
11
13
5MΩ
1kΩ
1mV
Gain = 1000
17
ISO
121
INA102
OPA121
NOTE: (1) All capacitor values in µF unless otherwise
noted. Diodes are IN4148. (2) NE2H: Neon bulb, max
striking voltage 95V
AC
.
6