ADM2484EBRWZ 查看數據表（PDF） - Analog Devices

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ADM2484EBRWZ

500 kbps, ESD Protected, Half-/Full-Duplex, iC oupler, Isolated RS-485 Transceiver

Analog Devices 

SWITCHING CHARACTERISTICS

VDD1

0V

Z

VO

Y

1/2VO

VDD1/2

tDPLH

VDD1/2

tDPHL

+VO

VDIFF

–VO

90% POINT

VDIFF = V(Y) – V(Z)

90% POINT

10% POINT

tDR

10% POINT

tDF

Figure 21. Driver Propagation Delay, Rise/Fall Timing

DE

0.5VDD1

tZL

0.5VDD1

tLZ

VDD1

0V

Y, Z

2.3V

tZH

Y, Z

2.3V

VOL + 0.5V

tHZ

VOH – 0.5V

VOL

VOH

0V

Figure 22. Driver Enable/Disable Delay

ADM2484E

A, B

RxD

RE

RxD

RxD

0V

0V

0V

tPLH

1.5V

tPHL

1.5V

Figure 23. Receiver Propagation Delay

0.5VDD1

tZL

0.5VDD1

tLZ

VOH

VOL

VDD1

0V

1.5V

OUTPUT LOW

tZH

OUTPUT HIGH

1.5V

VOL + 0.5V

VOL

tHZ

VOH

VOH – 0.5V

0V

Figure 24. Receiver Enable/Disable Delay

Rev. C | Page 11 of 16

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