LTC2803 LINER [Linear Technology], LTC2803 Datasheet - Page 11

• Manufacturer Part Number: LTC2803
• Description: Multiprotocol Transceiver
• Manufacturer: LINER [Linear Technology]

TesT circuiTs
Figure 1. RS485 Driver DC Characteristics
DY
GND
DRIVER
OR
V
L
DY
Y
Z
DRIVER
R
DIFF
Y
Z
Figure 3. RS485 Receiver Input Current and Resistance (Note 5)
V
+
–
OD
C
C
L
L
R
R
Figure 4. RS485 Driver Timing Measurement
L
L
V
+
–
OC
2872 F01
+
–
R
I
IN485
IN485
V
IN
Y - Z
Y, Z
DY
=
I
IN485
V
A OR B
B OR A
IN
V
OD
RECEIVER
t
10%
PLHD485
90%
Figure 2. RS485 Driver Output Short-Circuit Current
2872 F03
0V
½V
GND
OR
V
t
t
SKEWD485
OD
L
RD485
DY
DRIVER
t
Y OR Z
Z OR Y
PLHD485
0V
90%
I
OZD485
10%
t
FD485
+
–
LTC2872
, I
OSD485
V
2872 F02
OUT
2872 F04
V
0V
L
11
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