Linear Technology LTM2892-I, Demo Manual, Page: 2 / 6

2
dc1986af
DEMO MANUAL DC1986A
Figure 1. I
2
C Operation
Figure 2. DC1986A Radiated Emissions
OPERATING PRINCIPLES
V
CC1
V
L1
ON1
SCLIN
SDA1
INA
OUTB
SDA1
OUTC
5V
SCL(IN)
SDA(IN)
5V
SCL(OUT)
SDA(OUT)
VCC2
VL2
ON2
SCLOUT
SDA2
OUTA
INB
SDA2
INC
LTM2892-I
NOTE: INA, INB AND INC ARE
OPTIONAL CONNECTIONS
GND2 GND1
ISOLA
TION BARRIER
dc1986a F01
FREQUENCY (MHz)
0
dBμ
V
/m
60
–20
40
20
0
50
30
10
–10
–30
500 900 300 700
dn1986a F02
1000 400 800 200 600 100
CISPR 22 CLASS B LIMIT DUT
DETECTOR = PEAK HOLD
RBW = 120kHz
VBW = 300kHz
SWEEP TIME = 680ms, ≥ 10 SWEEPS
NUMBER OF POINTS = 501