ZHCSQC1D June 2022 – June 2024 ADC12DJ5200-EP
PRODUCTION DATA
The output of the ADCs can be sent through programmable finite-impulse-response (PFIR) digital filter for equalization of the frequency response. The filter can be setup in a few modes of operation to allow independent equalization of each channel in dual channel mode, equalization in single channel mode or as a time-varying filter in dual channel mode (such as for I/Q correction). The various PFIR operating modes are given in Table 6-7.
PFIR Mode | Center Tap Resolution | Center Tap LSB Weight | Non-Center Tap Resolution | Non-Center Tap LSB Weight | Filter Coefficients |
---|---|---|---|---|---|
Dual Channel Equalization | 18 bits | 2-16 | 12 bits | 2-10, 2-11...2-16 | 9 per channel |
Single Channel Equalization | 18 bits | 2-16 | 12 bits | 2-10, 2-11...2-16 | 9 |
Time Varying Filter | 18 bits | 2-16 | 12 bits | 2-10, 2-11...2-16 | 9 per coefficient set, 2 coefficient sets |
Programming information for the various PFIR modes is given in Table 6-8. The coefficients are programmed into the PFIR_Ax and PFIR_Bx registers.
PFIR Mode | PFIR_MODE | PFIR_SHARE | PFIR_MERGE |
---|---|---|---|
PFIR Disabled | 0 | X | X |
Dual Channel Equalization | 2 | 0 | 0 |
Single Channel Equalization | 2 | 1 | 1 |
Time Varying Filter | 2 | 0 | 1 |