ADDC02812DA/ADDC02815DA

REV. A

–7–

Typical EMI Curves and Test Setup

FREQUENCY – MHz

130

0.01

0.0001

0.001

70

90

30

110

50

CONDUCTED EMISSIONS CE–101

CE101–1 4.5 AMPS

Figure 13. Conducted Emissions, MIL-STD-461D, CE101,

+28 V Hot Line 100 W Load

FREQUENCY – MHz

130

10

0.01

0.1

70

90

30

110

50

1

CONDUCTED EMISSIONS CE–102

LIMIT 28VDC

Figure 14. Conducted Emissions, MIL-STD-461D, CE102,

+28 V Hot Line 100 W Load

FREQUENCY – MHz

166

0.1

0.0001

0.001

RE101–1

106

126

66

146

86

0.01

RE101 MIL–STD–461D

Figure 15. Radiated Emissions, MIL-STD-461D, RE101,

100 W Load

FREQUENCY – MHz

90

10

0.01

0.1

30

50

–30

70

10

1

100

1000

RADIATED EMISSIONS RE–102

RE102–2

Figure 16. Radiated Emissions, MIL-STD-461D, RE102,

Vertical Polarity, 100 W Load

Note: Figures 13–17 were obtained from measurements on the

ADDC02805SA, a single 5 V dc output converter. Since the

construction and topology of the dual output converters are

almost identical to the single output converter, and the compo-

nent values of the EMI differential and common filter in the

dual output converters are identical to the single output con-

verter, the subject figures are shown here as typical of the

ADDC028012DA and the ADDC02815DA converters.

Figure 17. Schematic of Test Setup for EMI Measurements

RETURN

CASE

LISN

1/4

0.1 F

GROUND PLANE

82nF

82nF

2 F

1

100 F

TWO METERS OF

TWISTED CABLE

NOTE: 100 F CAPACITOR AND 1

RESISTOR PROVIDE STABILIZATION FOR 100 H DIFFERENTIAL SOURCE INDUCTANCE

INTRODUCED BY THE LISNs. REFER TO SECTION ON EMI CONSIDERATIONS FOR MORE INFORMATION.

LISN