JAJSLU6B May 2023 – March 2024 DAC39RF10 , DAC39RFS10
PRODUCTION DATA
The first operation of the DUC is to interpolate the input signal to a higher data rate. The available interpolation options are summarized in Table 7-8. The sampling rate of the input signal is multiplied by the specified interpolation amount to determine the DAC output rate, subject to the maximum sample rate for the DAC39RF10 および RFS10. These rates do not include the optional 2x interpolation for DES mode. For interpolations rates 6x and below, a reduced number of DUC channels are available.
INTERPOLATION | Maximum Number of DUC channels |
---|---|
2x | 1 |
3x | 1 |
4x | 2 |
6x | 2 |
8x | 4 |
12x | 4 |
16x | 4 |
24x | 4 |
32x | 4 |
48x | 4 |
64x | 4 |
96x | 4 |
128x | 4 |
192x | 4 |
256x | 4 |
Each DUC contains multiple 2x or 3x interpolating filters. The filter coefficients for each filter are listed in Table 7-9 and the filters used for each interpolation factor are shown in Table 7-10. The interpolation filter composite responses are given in Figure 7-14 to Figure 7-42. The filters are designed to provide a passband bandwidth of 80% on the input bandwidth and passband ripple less than 0.01 dB. The stopband attenuation is greater than 90 dB for any signal within the passband.
Filter | Coefficients (Center Tap in Bold) |
---|---|
fir1 | [6 0 -19 0 47 0 -100 0 192 0 -342 0 572 0 -914 0 1409 0 -2119 0 3152 0 -4729 0 7420 0 -13334 0 41527 65536 41527 0 -13334 0 7420 0 -4729 0 3152 0 -2119 0 1409 0 -914 0 572 0 -342 0 192 0 -100 0 47 0 -19 0 6 ]*2-16 |
fir2 | [-12 0 84 0 -336 0 1006 0 -2691 0 10141 16384 10141 0 -2691 0 1006 0 -336 0 84 0 -12 ]*2-14 |
fir3 | [29 0 -214 0 1209 2048 1209 0 -214 0 29 ]*2-11 |
fir4 | [3 0 -25 0 150 256 150 0 -25 0 3 ]*2-8 |
fir5 | [-1 0 9 16 9 0 -1 ]*2-4 |
fir_3x | -38 -38 0 83 117 0 -214 -281 0 464 584 0 -900 -1102 0 1612 1929 0 -2713 -3190 0 4346 5040 0 -6699 -7684 0 10023 11408 0 -14701 -16661 0 21389 24260 0 -31417 -35960 0 48101 56540 0 -82781 -105224 0 215190 432780 524288 432780 215190 0 -105224 -82781 0 56540 48101 0 -35960 -31417 0 24260 21389 0 -16661 -14701 0 11408 10023 0 -7684 -6699 0 5040 4346 0 -3190 -2713 0 1929 1612 0 -1102 -900 0 584 464 0 -281 -214 0 117 83 0 -38 -38 ]*2-19 |
DUC Interpolation Factor (LDUC) | Filters Used in DUC | |||||||
---|---|---|---|---|---|---|---|---|
1st Filter | 2nd Filter | 3rd Filter | 4th Filter | 5th Filter | 6th Filter | 7th Filter | 8th Filter | |
2x | fir1 | |||||||
3x | fir_3x | |||||||
4x | fir1 | fir2 | ||||||
6x | fir_3x | fir2 | ||||||
8x | fir1 | fir2 | fir3 | |||||
12x | fir_3x | fir2 | fir3 | |||||
16x | fir1 | fir2 | fir3 | fir4 | ||||
24x | fir_3x | fir2 | fir3 | fir4 | ||||
32x | fir1 | fir2 | fir3 | fir4 | fir5 | |||
48x | fir_3x | fir2 | fir3 | fir4 | fir5 | |||
64x | fir1 | fir2 | fir3 | fir4 | fir5 | fir5 | ||
96x | fir_3x | fir2 | fir3 | fir4 | fir5 | fir5 | ||
128x | fir1 | fir2 | fir3 | fir4 | fir4 | fir5 | fir5 | |
192x | fir_3x | fir2 | fir3 | fir4 | fir4 | fir5 | fir5 | |
256x | fir1 | fir2 | fir3 | fir4 | fir4 | fir4 | fir5 | fir5 |