JAJSF13C March 2018 – January 2019 ADS1260 , ADS1261
PRODUCTION DATA.
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The digital filter receives the modulator output data and produces a high-resolution conversion result. The digital filter low-pass filters and decimates the modulator data (data rate reduction), yielding the final data output. By adjusting the type of filtering, tradeoffs are made between resolution, data throughput and line cycle rejection.
The digital filter has two selectable modes: sin (x) / x (sinc) mode and finite impulse response (FIR) mode (see Figure 60). The sinc mode provides data rates of 2.5 SPS through 40000 SPS with variable sinc orders of 1 through 5. The FIR filter provides simultaneous rejection of 50-Hz and 60-Hz frequencies with data rates 2.5 SPS through 20 SPS while providing single-cycle settled conversions.