Datasheet

www.ti.com
sin
NCO
cos
IOUTA1
IOUTA2
16-Bit
FIR4
IOUTB1
IOUTB2
x
sin(x)
DA[15:0]
DB[15:0]
DAC
16-Bit
DAC
x
sin(x)
A Gain
B Gain
A
Offset
B
Offset
B0160-01
Input Formatter
Fine Mixer
Quadrature Mod
Correction (QMC)
y2
FIR3
Course Mixer:
fs/2 or fs/4
y2
DAC5687
SLWS164E – FEBRUARY 2005 – REVISED SEPTEMBER 2006
Table 1. DAC5687 Modes of Operation (continued)
MODE FIR1 FIR2 FMIX QMC FIR3 CMIX
X4L FMIX ON – ON – ON –
X4L QMC ON – – ON ON –
X4L FMIX QMC ON – ON ON ON –
X4L CMIX ON – – – ON ON
X4L FMIX CMIX ON – ON ON ON
X4L QMC CMIX ON – – ON
(2)
ON ON
X4L FMIX QMC CMIX ON – ON ON
(2)
ON ON
X8 ON ON – – ON –
X8 FMIX ON ON ON – ON –
X8 QMC ON ON – ON ON –
X8 FMIX QMC ON ON ON ON ON –
X8 CMIX ON ON – – ON ON
X8 FMIX CMIX ON ON ON – ON ON
X8 QMC CMIX ON ON – ON
(1)
ON ON
X8 FMIX QMC CMIX ON ON ON ON
(1)
ON ON
Figure 29. Block Diagram for X2 Mode
Copyright © 2005 – 2006, Texas Instruments Incorporated Submit Documentation Feedback 21
Product Folder Link(s): DAC5687