Datasheet

ADS1281
www.ti.com SBAS378D –AUGUST 2007–REVISED JUNE 2010
REVISION HISTORY
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision C (March 2009) to Revision D Page
• Added footnote 8 to Electrical Characteristics table ............................................................................................................. 3
• Moved Equation 12 and Equation 13 to the Appendix from the HPF Stage section .......................................................... 17
• Added footnote 2 to Table 14, Ideal Output Code .............................................................................................................. 24
• Corrected sign typo in Equation 11 .................................................................................................................................... 42
• Updated Equation 13 .......................................................................................................................................................... 42
Changes from Revision B (August 2008) to Revision C Page
• Changed t
CMD
specification from 5 to 3 CLK cycles in Modulator Output Timing table ...................................................... 13
• Updated Equation 2 to include decimation ratio ................................................................................................................. 14
• Corrected typo in Equation 3 .............................................................................................................................................. 15
• Updated Figure 29 .............................................................................................................................................................. 16
• Minor graphical edits to Figure 38 ...................................................................................................................................... 21
• Minor graphical edits to Figure 39 ...................................................................................................................................... 21
• Changed 466/f
CLK
to 468/f
CLK
in t
DR
row of Table 11 .......................................................................................................... 21
• Added 103% FS limit to gain calibration ............................................................................................................................. 28
• Changed Figure 56, showing alternate bias resistor location ............................................................................................. 37
• Corrected Table 24 (Appendix, FIR Stage Coefficients) .................................................................................................... 39
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