Xadc Header - Xilinx AC701 User Manual

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)
for details on the capabilities of the analog front end.
XADC support 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
provided by a 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.
AC701 Evaluation Board
UG952 (v1.3) April 7, 2015
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
, V , and V
CCINT CCAUX CCBRAM
www.xilinx.com
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
are available. The AC701 board V
Feature Descriptions
Figure 1-47 shows the AC701 board
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
CCINT CCBRAM
Send Feedback
[Ref 10]
VCC5V0
are
75