10

®

PWS750

1

4

D

S

10µH

PWS750-1U

7

Input

Gnd

14

1

T

0.3µF

PWS750-3U

4

5

3

2

1

PWS740-2

0.3µF

6

3

G

6

2N7008

0.3µF

Output

Gnd

+V

O

O

–V

D

S

16

G

2N7008

3

11

V ±10V

IN

–V +V

Power for input signal

conditioning circuits

1

4

2

3

22

24

21

ISO103

12

16

14

10

V

±10V

OUT

0.3µF

1

4

D

S

5

6

72

D

S

4

3

TN0604

10µH

PWS750-1U

V

D

7

3

11

Input

Gnd

14

16

1

0.3µF

0.3µF

PWS750-3U

S

D

S

PWS750-4U

0.3µF

6

3

5V

TN0604

TN0604

TN0604

PWS750-4U

D

G

G

G

G

1

4

PWS750-3U

6

3

0.3µF

+V

O

–V

O

11

6

7

2

4

3

5

FIGURE 6. Powering the Internally Powered ISO103 Isolation Buffer From a Single 5V Supply. Two Power Channels Are

Necessary to Provide the 80mA Nominal for the +V of the ISO103.

FIGURE 7. 1500VAC Isolation Using PWS740-2 Transformer.