JAJSCV8B May 2016 – December 2021 ADC32RF80 , ADC32RF83
PRODUCTION DATA
7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
0 | 0 | 0 | 0 | NQ ZONE EN | NYQUIST ZONE | ||
W-0h | W-0h | W-0h | W-0h | R/W-0h | R/W-0h |
Bit | Field | Type | Reset | Description |
---|---|---|---|---|
7-4 | 0 | W | 0h | Must write 0 |
3 | NQ ZONE EN | R/W | 0h | This bit allows for specification of the operating Nyquist zone. 0 = Nyquist zone specification disabled 1 = Nyquist zone specification enabled |
2-0 | NYQUIST ZONE | R/W | 0h | These bits specify the Nyquist band for the portion of aliased spectrum that is not spanned by the frequencies specified in the Band-Freq. registers (register addresses B0-BB). If the Band-Freq registers are not enabled, this setting specifies the common Nyquist band information for the entire aliased spectrum. Set the NQ ZONE EN bit before programming these bits. For example, at s 3-GSPS chip clock, the first Nyquist zone is from dc to 1.5 GHz, the second Nyquist zone is from 1.5 GHz to 3 GHz, and so on. 000 = First Nyquist zone (dc – fS / 2) 001 = Second Nyquist zone (fS / 2 – fS) 010 = Third Nyquist zone 011 = Fourth Nyquist zone |