Datasheet

LTC2870/LTC2871
14
28701fb
For more information www.linear.com/LTC2870
TesT circuiTs
Figure1. RS485 Driver DC Characteristics Figure2. RS485 Driver Output Current
Figure3. RS485 Receiver Input Current and Resistance (Note 5)
Figure4. RS485 Driver Timing Measurement
28701 F01
DRIVER
DY/DI
GND
OR
V
L
Y
R
L
R
L
Z
V
OD
+
–
V
OC
+
–
28701 F02
DRIVER
Y OR Z
DY/DI
GND
OR
V
L
Z OR Y
V
OUT
I
OZD485
, I
OSD485
+
–
28701 F03
RECEIVER
A OR B
B OR A
V
IN
I
IN485
R
IN485
=
V
IN
I
IN485
+
–
28701 F04
DRIVER
DY/DI
Y
Z
R
DIFF
C
L
C
L
t
PLHD485
t
SKEWD485
t
PLHD485
t
RD485
t
FD485
90%
0V
V
OD
½V
OD
V
L
0V
DY/DI
Y, Z
Y - Z
10%
90%
0V
10%
Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.