AMIS-30663 Datasheet, PDF (9/11 Pages) AMI SEMICONDUCTOR – High Speed CAN Transceiver

AMIS−30663
HIGH
TxD
LOW
CANH
CANL
Vi(dif) =
VCANH − VCANL
0,9V
0,5V
dominant
recessive
RxD
t _{d(TxD−BUSon)}
t _{pd(rec−dom)}
0,3 x V33
t _{d(TxD−BUSoff)}
td(BUSon_−RxD)
t _{pd(dom−rec)}
0,7 x V33
td(BUSoff_−RxD)
Figure 7. Timing Diagram for AC Characteristics
+3.3 V
+5 V
V _CC
V ₃₃
100 nF
TxD
Generator
3
8
7
1 _AMIS−
30663
6
CANH
CANL
RxD
4
20 pF
5
30 W
2
V _REF
GND
6.2 k W
10 nF
6.2 k W
30 W
Active Probe
Spectrum Anayzer
47 nF
Figure 8. Basic Test Set−up for Electromagnetic Measurement
CANH
CANL
V_CM =
0.5*(V_CANH+V_CANL)
V _CM−step
recessive
V _CM−peak
V _CM−peak
Figure 9. Common−mode Voltage Peaks (see measurement set−up Figure 8)
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