Texas Instruments AMC7832EVM, Руководство пользователя, Страница: 11 / 33

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AMC7832EVM Hardware Overview
11 SLAU544A – February 2014 – Revised September 2016
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AMC7832EVM User’s Guide
Additionally, IOV
DD
is supplied by the SDM-USB-DIG, but can be externally sourced by setting the JP6
jumper, and connecting an external source to the J11 terminal block.
Table 5. AMC7832EVM Jumper and Shunt Resistor Settings
SIGNAL JUMPER DEFAULT POSITION FUNCTION
AV
DD
JP3 Shunt on 1-2
Selecting Internal or External AV
DD
• 1-2: Internal 5-V supply
• 2-3: External supply
IOV
DD
JP6 Shunt on 1-2
Selecting Internal or External IOV
DD
• 1-2: Internal 3.3-V supply
• 2-3: External supply
AV
CC
R44, R48, R55
R44 – Not populated +12-V LDO supply
R48 – Not populated +5-V LDO supply (default)
R55 – 0- Ω shunt External supply
AV
EE
R73, R74, R75
R73 – 0- Ω shunt External supply
R74 – Not populated GND
R75 – Not populated –12-V LDO supply (default)
4.5 ADC Signal Pins
The AMC7832 device contains 17 ADC single-ended channels, 12 of which have bipolar inputs (ADC0
through ADC11) and have an input range of –12.5 to 12.5 V. The unipolar inputs, (ADC12 through
ADC16), have a range of 0 to 5 V. These signal pins are connected to the J4 connector, which is
described in
Table 6 .
Table 6. AMC7832EVM ADC Signal Connections
NAME CONNECTOR DESCRIPTION
ADC0 J4-1 ADC Channel 0 Input
ADC1 J4-2 ADC Channel 1 Input
ADC2 J4-3 ADC Channel 2 Input
ADC3 J4-4 ADC Channel 3 Input
ADC4 J4-5 ADC Channel 4 Input
ADC5 J4-6 ADC Channel 5 Input
ADC6 J4-12 ADC Channel 6 Input
ADC7 J4-13 ADC Channel 7 Input
ADC8 J4-14 ADC Channel 8 Input
ADC9 J4-15 ADC Channel 9 Input
ADC10 J4-16 ADC Channel 10 Input
ADC11 J4-17 ADC Channel 11 Input
LV_ADC12 J4-7 ADC Channel 12 Input
LV_ADC13 J4-8 ADC Channel 13 Input
LV_ADC14 J4-9 ADC Channel 14 Input
LV_ADC15 J4-10 ADC Channel 15 Input
LV_ADC16 J4-11 ADC Channel 16 Input
4.6 DAC Signal Pins
The 12 DAC voltage outputs of the AMC7832 device are accessible through the J5, J7, J9, and J10
connectors, as shown in
Table 7 . The DAC voltage ranges are configurable through software and
hardware. Table 4 describes the selectable voltage ranges and jumper configurations for JP1, JP2, JP4,
and JP5.