ADS58J64: fNCO

Kazuhiko Hirano

Genius 16368 points

Part Number: ADS58J64

Hello,

At ADS58J64, fNCO frequency is defined as follows.

fNCO = NCO_WORD x fs / 2^16

What is fs here?

Is this fs the sampling frequency before the 1ts x2 decimation or the sampling frequency after x2 decimation?

Best regards,

K.Hirano

0 RJ Hopper over 7 years ago

Fs is the sampling frequency before any decimation. --RJH

0 Kazuhiko Hirano over 7 years ago in reply to RJ Hopper

RJH,

Thank you for your response.

Let me ask one more question.
Is the NCO_WORD 2’s complement?

Best regards,

K.Hirano

0 RJ Hopper over 7 years ago in reply to Kazuhiko Hirano

No. It is straight binary; no negative number. Reference section 7.4.1.1 in the datasheet and the register map. --RJH

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