Datasheet

NXP Semiconductors

QSG DAC1x08D+ECP3 DB

Quick Start Guide DAC1x08D + ECP3 demo board

<DOC_ID>

All information provided in this document is subject to legal disclaimers.

Quick Start Guide

Rev. 1.1 — 28 July 2010

14 of 17

5. Using an external clock reference

5.1 Configuring the board:

You have to configure the 2 jumpers as defined on the following picture:

Fig 19. Jumpers positions

The board is now configured for 2xDACs active (=> 2 USB cables required) and an

external clock is required.

You might face initialization issues at power-up, depending on the supply/clock

sequence. Simply plug/unplug one of the USB cables once the clock is applied on the

board and the initialization of the board will restart.

Please keep the input frequency below 200MHz and make sure that the sampling

frequency of the DAC is below 650MSPS, so properly configure the interpolation ratio

(x2, x4 or x8).

1xDAC/2xDACs

selector

Left

bottom

Clock_Int/Ext

selector

right

Clock In