ZHCSEV8D March 2016 – January 2018 ADS131A02 , ADS131A04
PRODUCTION DATA.
This register configures the ADC modulator clock and oversampling ratio for the converter.
7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
ICLK_DIV[2:0] | 0 | OSR[3:0] | |||||
R/W-4h | R/W-0h | R/W-6h |
LEGEND: R/W = Read/Write; -n = value after reset |
Bit | Field | Type | Reset | Description |
---|---|---|---|---|
7:5 | ICLK_DIV[2:0] | R/W | 4h | ICLK divider ratio.
These bits set the divider ratio to generate the ADC modulator clock, fMOD, from the fICLK signal. 000 : Reserved 001 : fMOD = fICLK / 2 010 : fMOD = fICLK / 4 011 : fMOD = fICLK / 6 100 : fMOD = fICLK / 8 101 : fMOD = fICLK / 10 110 : fMOD = fICLK / 12 111 : fMOD = fICLK / 14 |
4 | Reserved | R/W | 0h | Reserved.
Always write 0h. |
3:0 | OSR[3:0] | R/W | 6h | Oversampling ratio.
These bits set the OSR to create the ADC output data rate, fDATA; see Table 30 for more details. 0000 : fDATA = fMOD / 4096 0001 : fDATA = fMOD / 2048 0010 : fDATA = fMOD / 1024 0011 : fDATA = fMOD / 800 0100 : fDATA = fMOD / 768 0101 : fDATA = fMOD / 512 0110 : fDATA = fMOD / 400 0111 : fDATA = fMOD / 384 1000 : fDATA = fMOD / 256 1001 : fDATA = fMOD / 200 1010 : fDATA = fMOD / 192 1011 : fDATA = fMOD / 128 1100 : fDATA = fMOD / 96 1101 : fDATA = fMOD / 64 1110 : fDATA = fMOD / 48 1111 : fDATA = fMOD / 32 |
OSR[3:0] | OSR | fDATA AT 2.048-MHz fMOD (kHz) | fDATA AT 4.096-MHz fMOD (kHz) | fDATA AT 4-MHz fMOD (kHz) |
---|---|---|---|---|
0000 | 4096 | 0.500 | 1.000 | 0.977 |
0001 | 2048 | 1.000 | 2.000 | 1.953 |
0010 | 1024 | 2.000 | 4.000 | 3.906 |
0011 | 800 | 2.560 | 5.120 | 5.000 |
0100 | 768 | 2.667 | 5.333 | 5.208 |
0101 | 512 | 4.000 | 8.000 | 7.813 |
0110 | 400 | 5.120 | 10.240 | 10.000 |
0111 | 384 | 5.333 | 10.667 | 10.417 |
1000 | 256 | 8.000 | 16.000 | 15.625 |
1001 | 200 | 10.240 | 20.480 | 20.000 |
1010 | 192 | 10.667 | 21.333 | 20.833 |
1011 | 128 | 16.000 | 32.000 | 31.250 |
1100 | 96 | 21.333 | 42.667 | 41.667 |
1101 | 64 | 32.000 | 64.000 | 62.500 |
1110 | 48 | 42.667 | 85.333 | 83.333 |
1111 | 32 | 64.000 | 128.000 | 125.000 |