Xadc Header; Header Xadc_Vref Voltage Source Options - Xilinx KC705 User Manual

XADC Header

[Figure 1-2, callout 33]
7 series FPGAs provide an analog-to-digital converter (XADC) block. The XADC block
includes a dual 12-bit, 1 MSPS analog-to-digital converter (ADC) and on-chip sensors.
See 7 Series FPGAs XADC Dual 12-Bit 1MSPS Analog-to-Digital Converter User Guide
(UG480) [Ref 25]
the KC705 board XADC support features.
X-Ref Target - Figure 1-37
U1
Dual Use IO
(Analog/Digital)
100Ω
VAUX0P
1 nF
VAUX0N
To
100Ω
Header
J46 100Ω
VAUX8P
1 nF
VAUX8N
100Ω
The KC705 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 KC705 board VCCINT and VCCBRAM are
provided by a common 1.0 V supply.
KC705 Evaluation Board
UG810 (v1.8) March 20, 2018
for details on the capabilities of the analog front end.
J48
FPGA
To J69.3
XADC_VCC
VCCADC
100 nF
Close to
Package Pins
XADC_AGND
GNDADC
XADC_AGND
V REF (1.25V)
J47
V REFP
V REFP
100 nF
Close to
XADC_AGND
Package Pins
V REFN
100Ω
V P
1 nF
V N
100Ω
DXP
DXN
Figure 1-37: Header XADC_VREF Voltage Source Options
www.xilinx.com
Chapter 1: KC705 Evaluation Board Features
VCCAUX
Ferrite Bead
XADC_VCC Header J46
1.8V 150 mV max
U39
ADP123
Out In
10 μF
Gnd
1 μF
XADC_AGND
U42
To Header J46 J69
REF3012
Out In
Gnd
10 μF
Internal
Reference
Ferrite Bead
XADC_AGND
Star Grid
J42
Connection
To
Header
J46
Figure 1-37 shows
AV_5V To Header J46 VCC5V0
Ferrite Bead
J68
100 nF 1 nF
Filter 5V Supply
Locate Components on Board
XADC_VCC
J43
GND
UG810_c1_37_031214
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