SBAA377B April   2022  – January 2024 PCM3120-Q1 , PCM5120-Q1 , PCM6120-Q1 , TLV320ADC3120 , TLV320ADC3140 , TLV320ADC5120 , TLV320ADC5140 , TLV320ADC6120 , TLV320ADC6140

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Inherent Anti-Aliasing in TLV320ADCx140/TLV320ADCx120/PCMx120-Q1/PCMx140-Q1
  6. 3Flexible Digital Filters
    1. 3.1 Multi-Stage Decimation Filters
      1. 3.1.1 Linear Phase
      2. 3.1.2 Low-Latency Filters
      3. 3.1.3 Ultra-Low-Latency Filters
    2. 3.2 Programmable Biquad Filters
  7. 4References
  8. 5Revision History

3 Flexible Digital Filters

Once the analog signal is sampled into a discrete signal by the ADC, decimation filters attenuate out-of-band noise. In addition to decimation filters, programmable digital bi-quad filters can further shape the in-band signal frequency response. The following sections describe the decimation filters and bi-quad filter options offered by TLV320ADCx140 /TLV320ADCx120/PCMx120-Q1/PCMx140-Q1 devices.