ltc1535csw-trpbf Linear Technology Corporation, ltc1535csw-trpbf Datasheet - Page 7

• Manufacturer Part Number: ltc1535csw-trpbf
• Description: Isolated Rs485 Transceiver
• Manufacturer: Linear Technology Corporation

TEST CIRCUITS
V
RO
f
CC
RO
Figure 4. Driver Timing Test Circuit
10 F
= MAX
DI
BAUD
RATE
Figure 2. Driver DC Test Load
+
Y
Z
3V
1
DE
V
OD
(Test Configuration for the First Six Typical Performance Characteristics Curves)
Y
Z
1
28
27
26
25
1535 F02
1
4
1
LOGIC COMMON
R
R
RO
RE
DE
DI
R
R
V
GND
CC
V
OC
ST1
1535 F04
Figure 1. Self-Oscillation at Maximum Data Rate
2
C
C
L1
L2
3
2
FLOATING RS485 COMMON
ST2
CTX02-14659
420kHz
**
1/2 BAT54C
1/2 BAT54C
2
** TRANSFORMER
COOPER [phone]
RECEIVER
OUTPUT
UNDER TEST
2
OUTPUT
GND2
+
Figure 3. Receiver Timing Test Load
11
Figure 5. Driver Timing Test Load
R
D
I
LOAD
10 F
V
TEST POINT
14
CC2
C
RO2
SLO
RL
I
1535 F01
EXT
I
A
B
Y
Z
VCC2
C
16
15
17
13
12
18
500
L
V
1k
CC2
2
SLOW SLEW
RATE JUMPER
2
S1
S2
C1
50pF
Y
Z
1535 F05
S1
S2
LTC1535
1k
2
C2
50pF
1535 F03
R
L
V
CC
V
CC
1535fa
7