Datasheet

12
®
ISO122
+15V
9
7
8
10
V
IN
, up to
± 10V Swing
2
16
1
–15
0.1µF
0.1µF
0.33µF 0.33µF
4
PWS740–3
V
OUT
To PWS740–2,–1
NOTE: The input supplies can be subregulated to ±5V to reduce
PSR related errors without reducing the ±10V input range.
1
2
3
1
2
3
MC78L05
+5V
Regulator
–5V
Regulator
MC79L05
V
S
INPUT RANGE
(V) (V)
(1)
20+ –2 to +10
15 –2 to +5
12 –2 to +2
FIGURE 10. Improved PSR Using External Regulator.
FIGURE 11. Single Supply Operation of the ISO122P Isolation Amplifier. For additional information see AB-009.
NOTE: Since the amplifier is unity gain, the input
range is also the output range. The output can go to
–2V since the output section of the ISO amp operates
from dual supplies.
ISO
122P
R
1
R
2
R
4
INA105
Difference Amp
R
3
R
S
2
3
4
IN4689
5.1V
Reference
5
7
6
1
V
IN
Signal Source
+
NOTE: (1) Select to match R .
S
10kΩ
15
1
9
V (+15V)
S1
+V (+15V)
S2
–V (–15V)
S2
16
2
–V
S1
Com 2
V = V
OUT IN
7
8
10
In
Gnd
ISO
122
R
C
(1)
ISO
122P
ISO
122P