AMIS-30660 Datasheet, PDF (8/10 Pages) AMI SEMICONDUCTOR – High Speed CAN Transceiver

AMIS−30660
TxD
HIGH
LOW
CANH
CANL
V_i(dif) =
V_CANH − V_CANL
0,9V
0,5V
dominant
recessive
RxD
td(TxD_−BUSon)
tpd(rec_−dom)
0,3 x VCC
td(TxD_{−BUSoff)}
td(BUSon_−RxD)
tpd(dom_−rec)
0.7 x V_CC
td(BUSoff_−RxD)
Figure 6. Timing Diagram for AC Characteristics
PC20040829.6
+5 V
100 nF
TxD
1
V _CC
3
7 ^CANH
Generator
RxD
20 pF
AMIS− _{6 CANL}
30660
4
8
S
5
30 W
2 ^VREF
GND
6.2 k W
10 nF
6.2 k W
30 W
Active Probe
Spectrum Anayzer
47 nF
Figure 7. Basic Test Set−up for Electromagnetic Measurement
PC20040918.6
CANH
CANL
V_CM =
0.5*(V_CANH + V_CANL)
V _CM−step
recessive
V _CM−peak
V _CM−peak
PC20040829.7
Figure 8. Common−Mode Voltage Peaks (see Measurement Setup)
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