ADM1487EARZ-REEL7 View Datasheet(PDF) - Analog Devices
Part Name
Description
View to exact match
ADM1487EARZ-REEL7 Datasheet PDF : 16 Pages
| |||
ADM485E/ADM487E/ADM1487E
TEST CIRCUITS AND SWITCHING CHARACTERISTICS
Y
RL
VOD
RL
VOC
Z
Figure 18. Driver DC Test Load
0V OR 5V
D
GENERATOR
50Ω
VCC
RL = 500Ω
S1
OUT
CL
VDD
DE
A
DI
B
VOD
CL1
RL
CL2
DE
VCC
OUT
tDZL(StHDDZNL),
VOL
2.3V
VCC/2
tDLZ
5V
0V
0.5V
Figure 19. Driver Timing Test Circuit
Figure 22. Driver Enable and Disable Times (tDZL, tDLZ, tDZL(SHDN))
5V
DI
0V
1.5V
tDPLH
tDPHL
B
VO
A
VDIFF
VO
0V
–VO
1/2VO
20%
tDR
VDIFF = V (A) – V (B)
80%
80%
tSKEW = tDPLH – tDPHL
Figure 20. Driver Propagation Delays
1/2VO
20%
tDF
ATE
B
RECEIVER
OUTPUT
VID
R
A
Figure 23. Receiver Propagation Delay Test Circuit
A
B
VOH
RO
VOL
tRPLH
+1V
–1V
tRPHL
1.5V
THE RISE TIME AND FALL TIME OF INPUT A AND INPUT B < 4ns
Figure 24. Receiver Propagation Delays
0V OR 5V
D
GENERATOR
50Ω
S1
CL
OUT
RL = 500Ω
DE
OUT
tDZH(StHDDZNH),
2.3V
5V
1.5V
0V
0.5V
VOH
tDHZ
0V
Figure 21. Driver Enable and Disable Times (tDHZ, tDZH, tDZH(SHDN))
Rev. B | Page 11 of 16
|
|
Share Link: 