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Part Number: DAC900-Q1
Hi TI expert,
I've designer a PCB with DAC2900, 125MHz clock, based on your EVM file's instructions. Now, I decide to turn to DAC900-Q1, 165MHz clock.
My DAC2900 works well. Its clock is fed by FPGA's PLL and its 10 inputs are buffered by R-pack.
An EVM file is provides for DAC900 or DAC900-Q1.But, unfortunately, this file hardly provides any detailed componnet usage or PCB's schemtic.
I wonder if I apply my schematic designs of DAC2900 to DAC900, will this work? And is such R-pack very neccesary? Considering my application requeires high clock rate, but input data changes relatively slow, at a change rate of once per 100 nanoseconds.
Please see the attached design files for the DAC900EVM. Hopefully, this will be useful for your upcoming design.
As for the resistor pack, I believe it is a safer route to have some series resistance in line with the CMOS data, but is ultimately a design choice you will need to make.
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In reply to dBrock:
Hi Dan, Thx!
By the way, the schemtic shows two SN74LV245A are used between the DSP output and the DAC input.
Is this just to amplify DSP's output current? I tend to use FPGA to drive input signals to DAC900, and SN74LV245 is unnecessary in this circumstance, right?
In reply to Yatao Ling:
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