Analog Devices DC2779A Demo Manual page 5

QUICK START PROCEDURE
Arrow.com. Arrow.com. Arrow.com. Arrow.com. Arrow.com.
Downloaded from Downloaded from Downloaded from Downloaded from Downloaded from
Conducted EMI Performance
(CISPR25 Conducted Emission Test with Class 5 Peak Limits)
80
70
60
50
40
30
20
10
0
–10
–20
0 3 6 9 12
FREQUENCY (MHz)
Radiated EMI Performance
(CISPR25 Radiated Emission Test with Class 5 Peak Limits)
50
VERTICAL POLARIZATION
45
PEAK DETECTOR
40
35
30
25
20
15
10
5
0
–5
0 100 200 300 400
FREQUENCY (MHz)
50
HORIZONTAL POLARIZATION
45
PEAK DETECTOR
40
35
30
25
20
15
10
5
0
–5
0 100 200 300 400
FREQUENCY (MHz)
DC2779A DEMO BOARD
(WITH EMI FILTER INSTALLED)
5V INPUT TO 1.2V OUTPUT AT 16A, f
Figure 6. LT8644S Demo Circuit DC2779A EMI Performance
DEMO MANUAL DC2779A
CLASS 5 PEAK LIMIT
SPREAD SPECTRUM MODE
FIXED FREQEUNCY MODE
VOLTAGE METHOD
15 18 21 24 27 30
DC2779A F03a
CLASS 5 PEAK LIMIT
SPREAD SPECTRUM MODE
FIXED FREQUENCY MODE
500 600 700 800 900 1000
DC2779A F03b
CLASS 5 PEAK LIMIT
SPREAD SPECTRUM MODE
FIXED FREQUENCY MODE
500 600 700 800 900 1000
DC2779A F03c
= 2MHz
SW
Rev. 0
5