MIL-PRF-38534 Class H, Class K, and DLA SMD Test Program

Avago Technologies’s Hi-Rel Optocouplers are in compli-

ance with MIL-PRF-38534 Classes H and K. Class H and Class

K devices are also in compliance with DLA drawings 5962-

87679,and5962-90854.Testingconsistsof100%screening

and quality conformance inspection to MIL-PRF-38534.

Description

The schematic uses a dualchannel, high-speed optocou-

pler (HCPL-5530) to function as a servo type dc isolation

amplifier. This circuit operates on the principle that two

optocouplers will track each other if their gain changes

by the same amount over a specific operating region.

Performance of Circuit

 1% linearity for 10 V peak-to-peak dynamic range

 Gain drift: -0.03%/°C

 Offset Drift: ± 1 mV/°C

 25 kHz bandwidth (limited by Op-Amps U1, U2)

Figure 13. Isolation Amplifier Application Circuit.

3

R

1

2

3

4

8

7

6

5

1

2

-15 V

-

+

-

+

2

-15 V

6 mA

1

1

I

2

2

I

HCPL-5530

2

-

+

2

5 k

Ω GAIN ADJUST

5

R

5 k

Ω

OFFSET ADJUST

1

220

Ω

2.7 k

Ω

2.7 k

Ω

+

-

+

-

50 k

Ω

F

´

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Avago, Avago Technologies, and the A logo are trademarks of Avago Technologies, Limited in the United States and other countries.

Data subject to change. Copyright © 2005-2012 Avago Technologies Limited. All rights reserved. Obsoletes 5989-1659EN

AV02-3846EN - October 2, 2012