ous. The nonrecurrent pulse rating of the isolation barrier is
5000Vpk, since each unit is factory tested at 5000Vpk. If the
isolation barrier is to be subjected to higher voltages a gas
filled surge voltage protection device can be used. For
multichannel operation, two 3652s can be powered by one
Model 722 isolated DC/DC converter. The total leakage
current for both channels at 240V 60Hz would still be less
than 2µA.
The block diagram in Figure 10 shows the use of isolation
amplifiers in SCR control application.
Isolated DC/DC Converter
106
50k
C
P+
VOUT
≈
es = 20es
1.3kΩ
Input Common
722
V+
+VO
–VO
8
E
V–
25kΩ
11
14
+IR
6
+15VDC
–15VDC
12
12
26
20
23
3652
–6kV
–3kV
es
VOUT
To Monitor
1
17
–IR
10
–3kV
+5kV
Output
Common
25kΩ
9
Input
Common
FIGURE 9. 3652 Used in Patient Monitoring Application (ECG, VCG, EMG Amplifier).
®
11
3650/52
BB [ BURR-BROWN CORPORATION ]
