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ADC32RF44IRMPR Datasheet(PDF) 84 Page - Texas Instruments |
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ADC32RF44IRMPR Datasheet(HTML) 84 Page - Texas Instruments |
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84 / 135 page  84 ADC32RF44 SBAS809A – FEBRUARY 2017 – REVISED MARCH 2017 www.ti.com Product Folder Links: ADC32RF44 Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated 9.5.9.2 Register 0A2h (address = 0A2h), Main Digital Page Channel A Figure 146. Register 0A2h 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 LEGEND: R/W = Read/Write; W = Write only; -n = value after reset Table 57. Register 0A2h Field Descriptions 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 operating Nyquist zone for the analog correction loop. Set the NQ ZONE EN bit before programming these bits. For example, at a 2.6-GSPS chip clock, the first Nyquist zone is from dc to 1.3 GHz, the second Nyquist zone is from 1.3 GHz to 2.6 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 9.5.10 Main Digital Page Channel B (680100h, M = 1) 9.5.10.1 Register 000h (address = 000h), Main Digital Page Channel B Figure 147. Register 000h 7 6 5 4 3 2 1 0 0 0 0 0 0 0 0 DIG CORE RESET GBL W-0h W-0h W-0h W-0h W-0h W-0h W-0h R/W-0h LEGEND: R/W = Read/Write; W = Write only; -n = value after reset Table 58. Register 000h Field Descriptions Bit Field Type Reset Description 7-1 0 W 0h Must write 0 0 DIG CORE RESET GBL R/W 0h Pulse this bit (0 →1 →0) to reset the digital core (applies to both channel A and B). All Nyquist zone settings take effect when this bit is pulsed. |
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