JAJSF41 March 2018 TLV320ADC3100
PRODUCTION DATA.
Depending on the selected processing block, different types and orders of digital filtering are available. A first-order IIR filter is always available, and is useful to filter out possible DC components of the signal efficiently. Up to five biquad sections, or alternatively up to 25-tap FIR filters, are available for specific processing blocks. The coefficients of the available filters are arranged as sequentially indexed coefficients in two banks. If adaptive filtering is chosen, the coefficient banks can be switched while the processor is running.
The coefficients of these filters, as shown in Table 7, are each 16 bits wide, in 2s-complement format, and occupy two consecutive 8-bit registers in the register space. Specifically, the filter coefficients, shown in Figure 39, are in 1.15 (one dot 15) format with a range from –1.0 (0x8000) to 0.999969482421875 (0x7FFF).
FILTER | FILTER COEFFICIENT | ADC COEFFICIENT, LEFT CHANNEL | ADC COEFFICIENT, RIGHT CHANNEL |
---|---|---|---|
First-order IIR | N0 | C4 (page 4, registers 8, 9) | C36 (page 4, registers 72, 73) |
N1 | C5 (page 4, registers 10, 11) | C37 (page 4, registers 74, 75) | |
D1 | C6 (page 4, registers 12, 13) | C38 (page 4, registers 76, 77) |