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dc2226Afa

DEMO MANUAL DC2226A

Information furnished by Linear Technology Corporation is believed to be accurate and reliable.

However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-

tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.

HARDWARE SETUP

DC2226A Power Connections

E14: +6V Power Input. Connect to a low-noise supply set

to a current limit of 2A.

E12: +3V Power Input. Connect to a low-noise supply set

to a current limit of 2A.

E1, E9: GND - Ground connections for power supplies.

E5, E8: 1.8V test points. Measure 1.8V supply voltages

at these points. (Measurement only, do not apply power.)

E4, E6, E11: 3V3_1, 3V3_2, 3V3_3 test points. Measure

3.3V supply voltages at these points. (Measurement only,

do not apply power.)

E7, E13: 5V_1, 5V_2 test points. Measure 5V supply

voltages at these points. (Measurement only, do not ap-

ply power.)

DC2226A Signal Connections

J2, J3: Analog inputs for U1, 50Ω impedance. Maximum

J4, J5: Analog inputs for U3, 50Ω impedance. Maximum

J1:ExternalReferenceClockInput.Notconnected,requires

component changes, refer to schematic.

J6: FMC HPC interface to FPGA carrier board.

APPENDIX A

Xilinx KC705 Based Evaluation System

The DC2226A system consists of the DC2226A itself,

a Xilinx KC705 FPGA evaluation board, a DC2159 USB

communication board, and a host PC running the various

test programs. Complete systems that ship from Linear

Technology will have the KC705 board configured to

automatically load the default FPGA image for DC2226A

from the onboard configuration EEPROM. The procedure

for bringing up the system is as follows:

1) Iftheboardswereobtainedseparately,assemblethem

as shown in Figure 1 (FMC connectors are fragile,

make sure they are properly aligned before seating.)

2) Connect power supply to the KC705 board and turn

on the power switch. If the assembled system was

obtained from Linear Technology, the FPGA bitstream

willloadautomaticallyfromtheonboardconfiguration

memory.

3) Boards not obtained from Linear Technology will need

to be configured as described in the Alternate FPGA

Configuration section.

4) Apply power and analog input signals to the DC2226A

board.

5) Verify that PScope software is installed. Connect

DC2159 to the host PC with a USB-mini cable. Driver

installation will start automatically and PScope will

recognize the system when installation finishes. Quit

PScope and run Matlab/Python test scripts.

Note: Power must be applied to the KC705 board when

the USB cable is connected or the driver installation will

not complete properly.

Alternate FPGA Configuration

KC705 boards not obtained from Linear Technology will

need to be configured via JTAG. FPGA images are located

in the PScope installation directory in the FPGA_images

folder. Connect a USB micro cable to the JTAG USB con-

nector on the KC705 board and use a Xilinx tool such as

Impact or Vivado Lab Edition to load the bitfile. Once the

FPGA is configured, remove the USB cable and exit the

software. (The onboard JTAG adapter and the DC2159

USB communication board use the same USB controller

and they may interfere with one another.)