ZHCSNS4C April 2021 – September 2022 ADS127L11
PRODUCTION DATA
The sinc3 filter mode is a single-stage filter. Relatively high values of OSR provide line-cycle rejection with data rates = 480 SPS, 400 SPS, 60 SPS, and 50 SPS. Because of the large width of the frequency response notch, excellent line-frequency NMRR and CMRR can be achieved with this filter. Table 8-7 summarizes the characteristics of the sinc3 filter.
OSR | DATA RATE (SPS) | –3-dB FREQUENCY (Hz) | LATENCY (ms) | REJECTION OF FIRST NULL (dB) | |
---|---|---|---|---|---|
2% CLOCK TOLERANCE | 6% CLOCK TOLERANCE | ||||
HIGH-SPEED MODE (fCLK = 25.6 MHz) | |||||
26667 | 480 | 126 | 6.25 | 100 | 71 |
32000 | 400 | 105 | 7.50 | 100 | 71 |
LOW-SPEED MODE (fCLK = 3.2 MHz) | |||||
26667 | 60 | 15.7 | 50.01 | 100 | 71 |
32000 | 50 | 13.1 | 60.01 | 100 | 71 |
Figure 8-17 shows the frequency response of the sinc3 filter (OSR = 32000). Figure 8-18 shows the detailed response in the region of 0.9 to 1.1 · fIN / fDATA.