Texas Instruments ISO723X724XEVM Evaluation Module ISO723X724XEVM ISO723X724XEVM Datenbogen
Produktcode
ISO723X724XEVM
C14
C13
C12
C11
V
CC2
GND2
C5
C6
C7
C8
GND1
1
2
3
4
JMP6
1
2
3
4
JMP8
1
2
3
4
JMP9
1
2
3
4
JMP10
1
2
3
4
JMP3
1
2
3
4
JMP2
1
2
3
4
JMP1
R6
R1
R3
R2
P1
P3
P2
P4
J1
J2
J3
J4
J5
J6
J7
J8
J9
J10
C1
C2
C3
C10
C9
V
CC1
ISOLATION BARRIER
GND1
GND1
GND1
GND1
GND1
GND2
GND2
GND2
GND2
GND2
GND2
GND2
GND2
GND2
GND2
GND2
GND1
GND1
GND1
GND1
GND1
GND1
V
CC1
V
CC1
V
CC1
V
CC2
V
CC2
V
CC2
V
CC2
V
CC2
GND2
GND2
GND2
AO
BO
CO
DO
CNTRL/EN2
A
B
C
D
DISABLE /EN1
U1
Input
Input
Input
Output
Output
Output
Introduction
For example, in
, because the ISO7231 has the bottom channel configured in the opposing
direction, R3 and C3 have changed place from that in
. This is all that is required to reconfigure a
channel direction.
A user may also evaluate varied input and output loading conditions by replacing the factory-installed
1203 footprint loads.
1203 footprint loads.
1.3
The EVM Schematics of the Triple and Quad Isolators
This multifunctional EVM is designed with the signal paths displayed in
, and
for the evaluation of the ISO7230x, ISO7231x and ISO7631Fx triple-channel isolators.
The functional signal path schematics of the ISO7240CF, ISO7240x and ISO7640Fx are presented in
and
, whereas the ISO7241x, ISO7641Fx and ISO7242x are displayed in
,
, and
Note that each input channel has a 50-
Ω
load resistor to ground. Each output channel has a 4.7-pF load
capacitor to ground that when added to the parallel capacitance of the trace to the SMA connector brings
the total capacitive load to 15 pF.
the total capacitive load to 15 pF.
When a channel direction is reversed, the 50-
Ω
resistor and 4.7-pF capacitor change place, each to the
other side of the isolation barrier as displayed in
for the opposing channel.
Figure 5. The ISO7230x Same-Channel Direction EVM Schematic
Table 1. ISO7230x EVM
Connection
Label
Description
A
J1
SMA connector to the A input, pin 3
B
J2
SMA connector to the B input, pin 4
C
J3
SMA connector to the C input, pin 5
D
J4
SMA connector (not used)
DISABLE/EN1
J5
SMA connector (not used)
CNTRL/EN2
J6
SMA connector to the output enable input, pin 10
DO
J7
SMA connector (not used)
5
SLAU253A
–
June 2008
–
Revised September 2011
Triple- and Quad-Channel Digital Isolator EVM
Copyright
©
2008
–
2011, Texas Instruments Incorporated