DAC34H84_1109 Datasheet, PDF (72/80 Pages) Texas Instruments – Quad-Channel, 16-Bit, 1.25 GSPS Digital-to-Analog Converter (DAC)

DAC34H84
SLAS751B – MARCH 2011 – REVISED SEPTEMBER 2011
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LVPECL INPUTS
Figure 81 shows an equivalent circuit for the DAC input clock (DACCLKP/N) and the output strobe clock
(OSTRP/N).
CLKVDD
250 Ω
DACCLKP
OSTRP
SLEEP
250 Ω
2 kΩ
2 kΩ
Internal
Digital In
DACCLKN
OSTRN
GND
Figure 81. DACCLKP/N and OSTRP/N Equivalent Input Circuit
S0515-01
Figure 82 shows the preferred configuration for driving the CLKIN/CLKINC input clock with a differential
ECL/PECL source.
Differential ⁺
ECL
or
(LV)PECL
Source
–
C_AC
0.1 μF
C_AC
0.1 μF
100 Ω
R_T
150 Ω
R_T
150 Ω
CLKIN
CLKINC
S0029-02
Figure 82. Preferred Clock Input Configuration with a Differential ECL/PECL Clock Source
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