DAC5688_15 Datasheet, PDF (37/56 Pages) Texas Instruments – DUAL-CHANNEL, 16-BIT, 800 MSPS, 2x–8x INTERPOLATING DIGITAL-TO-ANALOG CONVERTER (DAC)

DAC5688
www.ti.com
SLLS880C – DECEMBER 2007 – REVISED AUGUST 2010
CLK2 and CLK2C Inputs
Figure 39 shows an equivalent circuit for the DAC input clock (CLK2/C).
CLKVDD
CLK2
CLK2C
333 W
2 KW
2 KW
666 W
Note: Input common mode level is
approximately 2/3 * CLKVDD or 1.2 V.
GND
Figure 39. CLK2/C Equivalent Input Circuit
Figure 40 shows the preferred configuration for driving the CLK2/CLK2C input clock with a differential ECL/PECL
source.
+
Differential
ECL
or (LV)PECL
Source
-
0.1 mF
CLK 2
C _AC
100 W
150 W
RT _{150 W}
0.1 mF
CLK2C
Figure 40. Preferred Clock Input Configuration With a Differential ECL/PECL Clock Source
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