DAC3484: MISSING DATA

eli

Part Number: DAC3484

Need your help regarding DAC3484 Quad-Channel, 16-Bit, 1.25 GSPS Digital-to-Analog Converter,

We are planning to work with the chip as 4 separate ADC at IF 184.32MHz (144.32~224.32MHz), using the complex signal mixer in fs/2 the Fdac we intended to use is 491.52MHz.

Unfortunately the datasets parameters starts at Fdac 600Mhz, can you please send us any relevant information (such as SFDR, IMD3, NSD and Second Harmonic Distortion @ Fdac=491.52MHz).

over 8 years ago

0 jim s over 8 years ago

TI__Guru* 91947 points

Eli,

We are looking into this.

Regards,

Jim

0 jim s over 8 years ago

TI__Guru* 91947 points

Eli,

We could collect this data for you using our EVM. Do you plan on using the NCO to generate this IF range from 144-224MHz? If not, why are you using the mixer?

Regards,

Jim

0 jim s over 8 years ago in reply to jim s

TI__Guru* 91947 points

Eli,

The numbers you requested are going to be almost the same as the ones in the data sheet with Fdac = 600MHz. The issue you are going to have is trying to filter out the image with the IF at 224.32MHz since Fs/2 is at 245.76MHz. See attached plot from data captured from a DAC3484EVM with your setup.

Regards,

Jim

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DAC3484: MISSING DATA