ZHCSE42D April 2015 – April 2019 ADS54J60
PRODUCTION DATA.
7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
FREEZE CORR | DC OFFSET CORR BW | BYPASS CORR | ALWAYS WRITE 1 | 0 | |||
R/W-0h | R/W-0h | R/W-0h | R/W-0h | W-0h |
Bit | Field | Type | Reset | Description | ||
---|---|---|---|---|---|---|
7 | FREEZE CORR | R/W | 0h | Offset correction block is enabled by default. Set this bit to freeze the block.
0 = Default after reset 1 = Offset correction block is frozen See the DC Offset Correction Block in the ADS54J60 section for details. |
||
6-3 | DC OFFSET CORR BW | R/W | 0h | These bits allow the user to program the 3-dB bandwidth of the notch filter centered around k × fS / 4 (k = 0, 1, 2). The notch filter is a first-order digital filter with 3-dB bandwidth:
3-dB bandwidth normalized to fS 0 = 2.99479E-07 1 = 1.4974E-07 2 = 7.48698E-08 3 = 3.74349E-08 4 = 1.87174E-08 5 = 9.35872E-09 6 = 4.67936E-09 7 = 2.33968E-09 8 = 1.16984E-09 9 = 5.8492E-10 10 = 2.9246E-10 11 = 1.4623E-10 For example, at fS = 1 GSPS, if DC OFFSET CORR BW is set to 1, the notch filter has a 3-dB bandwidth of 149.74 Hz. |
||
2 | BYPASS CORR | R/W | 0h | 0 = Default after reset
1 = Offset correction block is bypassed See the DC Offset Correction Block in the ADS54J60 section for details. |
||
1 | ALWAYS WRITE 1 | R/W | 0h | Always write 1 | ||
0 | 0 | W | 0h | Must write 0 |