LTC1535CSWPBF LINER [Linear Technology], LTC1535CSWPBF Datasheet - Page 8

• Manufacturer Part Number: LTC1535CSWPBF
• Description: Isolated RS485 Transceiver
• Manufacturer: LINER [Linear Technology]

LTC1535
TEST CIRCUIT
8
Figure 1. Self-Oscillation at Maximum Data Rate (Test Confi guration for the First Six Typical Performance Characteristics Curves)
V
RO
f
CC
RO
Figure 4. Driver Timing Test Circuit
= MAX
10μF
BAUD
RATE
DI
Figure 2. Driver DC Test Load
+
Y
Z
3V
1
DE
V
OD
Y
Z
1
28
27
26
25
1535 F02
1
4
1
LOGIC COMMON
RO
RE
DE
DI
R
R
R
R
V
GND
CC
V
OC
ST1
1535 F04
2
C
C
L1
L2
3
2
FLOATING RS485 COMMON
ST2
CTX02-14659
420kHz
**
1/2 BAT54C
1/2 BAT54C
UNDER TEST
2
** COOPER [phone]
RECEIVER
OUTPUT
OUTPUT
2
GND2
+
Figure 3. Receiver Timing Test Load
11
Figure 5. Driver Timing Test Load
R
D
I
LOAD
10μF
TEST POINT
C
V
500Ω
C
L
14
CC2
RL
RO2
SLO
I
EXT
1535 F01
I
A
B
Y
Z
VCC2
16
15
17
13
12
18
1k
V
CC2
2
SLOW SLEW
RATE JUMPER
1535 F05
S1
S2
S1
S2
2
C1
50pF
Y
Z
1k
V
CC
1535 F03
2
C2
50pF
R
L
V
CC
1535fb