Texas Instruments ADS7854EVM-PDK, Руководство пользователя, Страница: 4 / 35

ADSxx54
AINP-A (Pin 1)
AINM-A (Pin 2)
AINP-B (Pin 8)
AINM-B (Pin 7)
SMA J2 (IN+)
Header JP2.2
SMA J1 (IN
±
)
Header JP1.2
THS4521
Fully Differential Amplifier
SMA J4 (IN+)
Header JP4.2
SMA J3 (IN
±
)
Header JP3.2
A0(+)
A0(
±
)
A1(+)
A1(
±
)
±
+
+
±
5 V
THS4521
Fully Differential Amplifier
±
+
+
±
5 V
EVM Analog Interface
www.ti.com
Figure 1. ADSxx54EVM Analog Interface Input Connections
Table 1 summarizes the JP1 through JP4 analog interface connectors.
Table 1. JP1 to JP4: Analog Interface Connections
Terminal Number Signal Description
CHA negative differential input. This terminal can be grounded
JP1.2 A0(–)
for single-ended signals.
JP2.2 A0(+) CHA positive differential input or input for single-ended signals.
CHB negative differential input. This terminal can be grounded
JP3.2 A1(–)
for single-ended signals.
JP4.2 A1(+) CHB positive differential input or input for single-ended signals.
Table 2 lists the SMA analog inputs.
Table 2. SMA Analog Interface Connections
Terminal Number Signal Description
CHA negative differential input. This SMA connector can be
J1 A0(–) grounded by shunting JP1 terminal1 and JP1 terminal 2 for
single-ended signals.
J2 A0(+) CHA positive differential input or input for single-ended signals.
CHB negative differential input. This SMA connector can be
J3 A1(–) grounded by shunting JP3 terminal 1 and JP3 terminal 2 for
single-ended signals.
J4 A1(+) CHB positive differential input or input for single-ended signals.
4 ADS8354EVM-PDK and ADS7854EVM-PDK SBAU209 – April 2014
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