DAC5688 datasheet(19/55 Pages) TI

19 / 55 page

DAC5688

www.ti.com

SLLS880B – DECEMBER 2007 – REVISED MAY 2010

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

phaseadd(31:24)

The phaseadd(31:24) value is used to determine the frequency of the NCO. The two’s complement formatted value

can be positive or negative and the LSB is equal to Fs/(2^32).

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

qmc_gaina(7:0)

Lower 8 bits of the 11-bit Quadrature Modulator Correction (QMC) gain word for DACA. The upper 3 bits are in

the CONFIG15 register. The full 11-bit qmc_gaina(10:0) word is formatted as UNSIGNED with a range of 0 to

1.9990 and the default gain is 1.0000. The implied decimal point for the multiplication is between bit 9 and bit 10.

Refer to formatting reference below.

qmc_gaina(10:0)

Format

Gain Value

[Binary]

[Decimal]

00000000000

0 + 0/1024 =

0.0000000

00000000001

0 + 1/1024 =

0.0009766

…..

….

01111111111

1023 0 + 1023/1024 =

0.9990234

10000000000

[Default] 1024

1 + 0/1024 =

1.0000000

10000000001

1025

1 + 1/1024 =

1.0009766

…..

….

11111111111

2047 1 + 1023/1024 =

1.9990234

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

qmc_gainb(7:0)

: Lower 8 bits of the 11-bit QMC gain word for DACB. The upper 3 bits are in CONFIG15 register. Refer to CONFIG12

above for formatting.

Submit Documentation Feedback

Product Folder Link(s): DAC5688

DAC5688 Datasheet(PDF) 19 Page - Texas Instruments

DAC5688 Datasheet(HTML) 19 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55

Datasheet Download

Link URL