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AMIS-30660_14 Datasheet, PDF (8/10 Pages) ON Semiconductor – High Speed CAN Transceiver | |||
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AMISâ30660
TxD
HIGH
LOW
CANH
CANL
Vi(dif) =
VCANH â VCANL
0,9V
0,5V
dominant
recessive
RxD
td(TxDâBUSon)
tpd(recâdom)
0,3 x VCC
td(TxDâBUSoff)
td(BUSonâRxD)
tpd(domârec)
0.7 x VCC
td(BUSoffâRxD)
Figure 6. Timing Diagram for AC Characteristics
PC20040829.6
+5 V
100 nF
TxD
1
V CC
3
7 CANH
Generator
RxD
20 pF
AMISâ 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 Setâup for Electromagnetic Measurement
PC20040918.6
CANH
CANL
VCM =
0.5*(VCANH + VCANL)
V CMâstep
recessive
V CMâpeak
V CMâpeak
PC20040829.7
Figure 8. CommonâMode Voltage Peaks (see Measurement Setup)
http://onsemi.com
8
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