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ADM2481 Datasheet, PDF (12/20 Pages) Analog Devices – Half-Duplex, iCoupler Isolated RS-485 Transceiver
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ADM2481
SWITCHING CHARACTERISTICS
VDD1
0.5VDD1
0V
tPLH
B
1/2VOD
VOD
0.5VDD1
tPHL
A
VOH
A, B
VOL
90% POINT
10% POINT
tR
tSKEW = |tPLH – tPHL|
90% POINT
10% POINT
tF
Figure 22. Driver Propagation Delay, Rise/Fall Timing
A–B
RxD
0V
0V
tPLH
tPHL
VOH
1.5V tSKEW = |tPLH – tPHL|
1.5V
VOL
Figure 23. Receiver Propagation Delay
DE
0.5VDD1
tZL
0.5VDD1
tLZ
0.7VDD1
0.3VDD1
A, B
A, B
2.3V
tZH
2.3V
VOL + 0.5V
tHZ
VOH – 0.5V
VOL
VOH
0V
Figure 24. Driver Enable/Disable Timing
RE
0.5VDD1
tZL
0.5VDD1
tLZ
0.7VDD1
0.3VDD1
RxD
RxD
1.5V
OUTPUT LOW
VOL + 0.5V
VOL
tZH
tHZ
OUTPUT HIGH
1.5V
VOH – 0.5V
VOH
0V
Figure 25. Receiver Enable/Disable Timing
Rev. 0 | Page 12 of 20
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