ADM1487EARZ Analog Devices Inc, ADM1487EARZ Datasheet - Page 11

• Manufacturer Part Number: ADM1487EARZ
• Description: IC TXRX HALF DUP RS485/422 8SOIC
• Manufacturer: Analog Devices Inc
• Type: Transceiverr

Specifications of ADM1487EARZ

• Number Of Drivers/receivers: 1/1
• Protocol: RS422, RS485
• Voltage - Supply: 4.75 V ~ 5.25 V
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

TEST CIRCUITS AND SWITCHING CHARACTERISTICS
V
OUT
DIFF
DE
DI
GENERATOR
–V
5V
Figure 21. Driver Enable and Disable Times (t
V
0V
0V
0V OR 5V
O
B
A
O
t
DZH(SHDN)
1.5V
t
V
DR
O
1/2V
t
20%
DI
DZH,
Y
Z
O
Figure 20. Driver Propagation Delays
DE
Figure 19. Driver Timing Test Circuit
V
DD
50Ω
Figure 18. Driver DC Test Load
V
2.3V
OD
D
80%
A
B
t
t
DPLH
SKEW
V
DIFF
=
R
R
= V (A) – V (B)
L
L
t
V
DPLH
OD
S1
t
– t
DPHL
DPHL
V
t
C
R
DHZ
80%
OC
L
L
DHZ
1.5V
, t
DZH
C
C
0.5V
, t
L1
L2
R
DZH(SHDN)
L
20%
= 500Ω
1/2V
t
OUT
DF
5V
0V
V
0V
OH
O
)
Rev. B | Page 11 of 16
RO
OUT
V
DE
CC
V
V
GENERATOR
OH
OL
A
B
0V OR 5V
Figure 22. Driver Enable and Disable Times (t
t
DZL(SHDN)
THE RISE TIME AND FALL TIME OF INPUT A AND INPUT B < 4ns
Figure 23. Receiver Propagation Delay Test Circuit
V
ATE
t
OL
DZL,
ADM485E/ADM487E/ADM1487E
Figure 24. Receiver Propagation Delays
1.5V
50Ω
D
2.3V
V
t
RPLH
ID
S1
B
A
t
C
DLZ
L
R
DZL
V
RECEIVER
OUTPUT
, t
CC
V
DLZ
CC
/2
R
, t
L
DZL(SHDN)
= 500Ω
OUT
5V
0V
0.5V
)
t
RPHL
+1V
–1V