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Chapter 1:
AC701 Evaluation Board Features
XADC Header
[Figure
7 series FPGAs provide an Analog Front End (XADC) block. The XADC block includes a dual
12-bit, 1 MSPS Analog-to-Digital Convertor (ADC) and on-chip sensors. See 7 Series FPGAs
XADC Dual 12-Bit 1MSPS Analog-to-Digital Converter User Guide (UG480)
on the capabilities of the analog front end.
features.
X-Ref Target - Figure 1-47
U1
Dual Use IO
(Analog/Digital)
100Ω
VAUX0P
1 nF
VAUX0N
To
100Ω
Header
J49
100Ω
VAUX8P
1 nF
VAUX8N
100Ω
The AC701 board supports both the internal FPGA sensor measurements and the external
measurement capabilities of the XADC. Internal measurements of the die temperature, V
V
common 1.0V supply.
Jumper J42 can be used to select either an external differential voltage reference (XADC_VREF) or
on-chip voltage reference (jumper J42 2–3) for the analog-to-digital converter.
76
Send Feedback
1-2, callout 31]
XADC_VCC
FPGA
XADC_VCC
VCCADC
100 nF
Close to
Package Pins
XADC_AGND
GNDADC
XADC_AGND
J42
XADC_VREFP
V REFP
100 nF
Close to
Package Pins
V REFN
100Ω
V P
1 nF
V N
100Ω
DXP
DXN
Figure 1-47: Header XADC_VREF Voltage Source Options
, and V
are available. The AC701 board V
CCAUX
CCBRAM
www.xilinx.com
Figure 1-47
shows the AC701 board XADC support
VCCAUX
Ferrite Bead
J43
XADC_VCC Header J49
1.8V 150 mV max
U10
ADP123
In
Out
Gnd
10 μF
XADC_AGND
XADC_VREF to
XADC Header J19.11
U35
REF3012
V REF (1.25V)
Out
In
Gnd
10 μF
Internal
Reference
Ferrite Bead
XADC_AGND
XADC_AGND
Star Grid
Connection
To
Header
J19
[Ref 10]
XADC_VCC5V0 to
XADC Header J19.13
Ferrite Bead
J53
10 μF
100 nF 1 nF
Filter 5V Supply
Locate Components on Board
J54
XADC_VCC
J10
GND
J9
UG952_c1_39_101612
and V
are provided by a
CCINT
CCBRAM
AC701 Evaluation Board
UG952 (v1.4) August 6, 2019
for details
VCC5V0
,
CCINT
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