Texas Instruments Sympol SN65HVD96, User Manual

Page: 3 / 12

GND
EARTH
C1
1 F
m
1 2 3
TB1
JMP4
1
2
1
JMP14
D
JMP3
1
2
1
JMP13
DE
JMP2
1
2
3
4
1
R2
50
W
n.a.
JMP12
JMP1
1
2
1
C6
n.a.
JMP11
R
R10
0
W
1 2
JMP6
1
2
3
4
JMP7
1
2
3
4
R9
0
W
1
2
3
TB2
R3
50
W
n.a.
R4
50
W
n.a.
RE
C10
10
m F
C11
68
m
F
C12
n.a.
C1
1
m F
C2
0.1
m F
C4
1
m F
C5
0.1
m F
C13
n.a.
JMP9
1 2 3 4
JMP10
1 2 3 4
V
C
M
_
A
V
C
M
_
B
C9
n.a.
VCC
VCC
VCC
VCC
VCC
V
C
C
V
C
M
_
B
JMP8
1 2 3 4
C8
n.a.
V
C
C
V
C
M
_
A
R8
0
W
RE
U1
R
DE
D
1
2
3
4
B
VCC
A
GND
8
7
6
5
3
4
3
4
3
4 2
3
2
3
2
3
2
3
R5
120
W
C7
n.a.
R6
n.a.
VCM_B
R7
n.a.
VCM_A
D1
VCC_ON
R1
1 k
W
1
2
R14
1 k W
D2
D_IN
1 2
R11
1 k W
D3
R_OUT
VCC
B
A
5V
PSU
1 2 3
TB1
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EVM Set-up and Precautions
Figure 2. EVM Schematic
For the first measurements, ignore the common-mode simulation and connect EARTH to GND through a
wire-bridge between pin 1 and pin 2 of TB1.
Figure 3. Bridging DUT_GND with EART_GND
While JMP2 to JMP4 are stimulation points, or headers through which the control and data signals for the
SN65HVD96 are applied, JMP1, and JMP11 to JMP14 are probe points, or headers at which these signal
can be measured.
Note that the 50 Ω resistors, R2, R3, and R4, have the index n.a., indicating that these components are
not assembled. Because signal generators have a typical source impedance of 50 Ω , their output is twice
the required signal voltage, assuming that the on-board 50 Ω resistors divide this voltage down to the
correct signal level.
Without these resistors; however, this voltage divider action is not given, and the generator output voltage
must be reduced to 5 V to avoid damaging the transceiver inputs.
3 SLLU128A – June 2010 – Revised August 2010 Sympol™ Transceiver
Copyright © 2010, Texas Instruments Incorporated