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dc2085afb

DEMO MANUAL DC2085

the JTAG position the J9 is used with a JTAG programmer

to program the FPGA. (Default: SPI or down)

Connectors

J1: DC590. This is an optional header that can be used

to program the DAC with the DC590. (Default: removed)

J9: JTAG. This is an optional header that can be used to

program the FPGA through a JTAG programmer. (Default:

removed)

J7: USB. Connect a USB cable from J7 to a computer with

the LTDACGen software installed.

J10 & J11: HSMC Connectors. These connectors are

designed to connect to the Altera Stratix IV development

board. All of the communication between the FPGA and

the DAC is routed through these connectors.

APPLYING POWER AND SIGNALS TO THE DC2085

DEMONSTRATION CIRCUIT

If a Stratix IV demo board is used to supply data to the

DC2085, the two boards should first be bolted together

and a proper connection should be made. If Linear Tech-

nology provided the Stratix IV board the proper bit file is

already installed in flash memory and will begin to operate

when the board is powered on. If an unprogrammed FPGA

board is used, refer to the appropriate documentation on

how to program it.

Power should be applied to the system in this order:

1. Connect the Altera board to the provided power supply.

2. Connect the USB cable to J7.

3. Apply a clock to J4.

4. Connect any optional output board to J5 and J6.

5. Turn on the voltage to the Altera board.

6. Connect the 5V from a bench supply to the +5V turret

on the DC2085.

7. Open the LTDACGen software and hit connect.

LTDACGen should report back that it is connected to the

FPGA. See Figure 2:

QUICK START PROCEDURE

Figure 2. LTDACGen Connected to FPGA