Xilinx VC707 User Manual

VC707 Evaluation Board www.xilinx.com 75
UG885 (v1.4) May 12, 2014
Feature Descriptions
XADC Analog-to-Digital Converter
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
7SeriesFPGAs
XADC Dual 12-Bit 1MSPS Analog-to-Digital Converter User Guide
(UG480) [Ref 10] for details
on the capabilities of the analog front end. Figure 1-34 shows the XADC block diagram.
The VC707 board supports both the internal FPGA sensor measurements and the external
measurement capabilities of the XADC. Internal measurements of the die temperature,
VCCINT, VCCAUX, and VCCBRAM are available. The VC707 board VCCINT and
VCCBRAM are provided by a common 1.0 V supply.
Jumper J42 can be used to select either an external differential voltage reference (VREF) or
on-chip voltage reference for the analog-to-digital converter.
X-Ref Target - Figure 1-34
Figure 1-34: XADC Block Diagram
FPGA
U1
VAUX0N
VAUX0P
VAUX8N
VAUX8P
V
REF (1.25V)
V
REFN
VCCADC
GNDADC
V
N
V
P
DXP
DXN
UG885_c1_31_030512
100Ω
1 nF
100Ω
100Ω
1 nF
100Ω
To
Header
J49
Dual Use IO
(Analog/Digital)
100Ω
1 nF
100Ω
To
Header
J19
100 nF
XADC_AGND
REF3012
U35
Out In
Gnd
J42
XADC_AGND
Internal
Reference
To Header J19
10 μF
Ferrite Bead
100 nF
1 nF
Ferrite Bead
J10
J9
Star Grid
Connection
J54
XADC_VCC
XADC_AGND
GND
V
REFP
V
REFP
ADP123
U10
Out
In
Gnd
XADC_AGND
1 μF
XADC_VCC Header J49
100 nF
XADC_AGND
To J54.3
XADC_VCC
J43
Ferrite Bead
VCCAUX
VCC5V0
10 μF
AV_5V To Header J19
1.8V 150 mV max
J53
Filter 5V Supply
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Xilinx VC707 Specifications

General

Brand	Xilinx
Model	VC707
Category	Motherboard
Language	English