Current Measurement Interface Connector - Broadcom ACPL-355JC Reference Manual

ACPL-355JC Reference Manual 62-mm SiC Module EB1200M62-355JC Evaluation Board

3.4.4 Current Measurement Interface Connector

The EB1200M62-355JC evaluation board integrates double-buffered MCLK and MDAT input, which serves as the interface
to the external current measurement board. The two signals from the ACPL-736J current sensing module are brought to the
EB1200M62-355JC using an FPC connector. They are then routed to the buffer and subsequently to the user via user
interface connector. Note that these signal routes must have the same length; therefore length matching must be applied in
the layout. Figure 22 shows the buffer configuration, and Figure 23 current measurement interface connector.
Besides providing input for the PWM signals, the user interface connector J2 provides output for the fault signals, DC bus
voltage, and buffered CLK and DATA signals for current measurement. Figure 22 shows the buffer configuration for the CLK
and DATA signals. Note that these signal routes must have the same length; therefore length matching must be applied in
the layout design.
Figure 22: CLK and DATA Double-Buffer Configuration
Figure 23: Current Measurement Interface Connector
The EB1200M62-355JC allows the user to select the voltage reference to be used for powering the ACPL-736J (external
output current measurement). Available voltage levels are 5V and 3.3V, which can be chosen by correctly adjusting the J3
jumper, which is shown in Figure 24.
Broadcom ACPL-355JC-62mmSiC-RM100
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