LTC1535 Linear Technology, LTC1535 Datasheet - Page 5

• Manufacturer Part Number: LTC1535
• Description: Isolated RS485 Transceiver
• Manufacturer: Linear Technology

BLOCK DIAGRA
TEST CIRCUITS
28
27
26
25
1
4
RO
RE
DE
DI
V
GND
Figure 3. Driver Timing Test Circuit
CC
DI
Figure 1. Driver DC Test Load
Y
Z
3V
DE
V
OD
Y
Z
ST1
W
1535 F01
2
R
R
FAULT
EN
EN
R
R
DECODE
ENCODE
3
ST2
V
OC
1535 F03
POWER SIDE
400kHz
C
C
L1
L2
1
ISOLATED SIDE
1.3
ENCODE
DECODE
FAULT
GND2
+
RECEIVER
11
OUTPUT
EN
EN
UNDER TEST
OUTPUT
V
14
Figure 2. Receiver Timing Test Load
CC2
Figure 4. Driver Timing Test Load
TEST POINT
C
RL
R
C
500
L
D
1k
S1
S2
1535 F04
S1
S2
LTC1535
1k
1535 BD
1535 F02
RO2
SLO
A
B
Y
V
Z
CC
V
16
15
17
13
12
18
CC
5