Datasheet

LM49450
SNAS440D –FEBRUARY 2008–REVISED MAY 2013 www.ti.com
Table 7. CP_DIV Default Value 0x49h
Bits Field Description
7:0 CP_DIV Programs the CP divider (devides from an expected 12.000MHz
input).
CP_DIV Divide Value
0 Bypass
1 1
2 1.5
3 2
4 2.5
5 to 253 3 to 127
254 127.5
255 128
Examples of CP_DIV Values one might use for various sample rates and DAC modes
Table 8. Typical CP_DIV Values for DAC Mode 00
MCLK (MHZ) CP_DIV Nominal Frequency (Hz)
2 11 333333
2.75625 16 324265
3 17 333333
4 23 333333
5.5125 33 324264
6 36 324324
8 48 326530
11.025 67 324265
12 73 324324
Table 9. Typical CP_DIV Values for DAC Mode 01
MCLK (MHZ) CP_DIV Nominal Frequency (Hz)
2.048 11 341333
2.8224 17 313600
3.072 18 323368
4.096 24 327680
5.6448 33 332047
6.144 37 323368
8.192 49 327680
11.2896 68 327234
12.288 75 323368
Table 10. Typical CP_DIV Values for DAC Mode 10
MCLK (MHZ) CP_DIV Nominal Frequency (Hz)
11.2896 68 327234
12.288 75 323368
Table 11. Typical CP_DIV Values for DAC Mode 11
MCLK (MHZ) CP_DIV Nominal Frequency (Hz)
22.5792 138 324881
24.576 150 325510
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