DAC1408D650HW/C1 NXP [NXP Semiconductors], DAC1408D650HW/C1 Datasheet - Page 32

• Manufacturer Part Number: DAC1408D650HW/C1
• Manufacturer: NXP [NXP Semiconductors]

NXP Semiconductors
DAC1408D650_1
Objective data sheet
10.13.2 DC interface to an Analog Quadrature Modulator (AQM)
When the system operation requires to keep the DC component of the spectrum, the
DAC1408D650 can use a DC interface to connect to an AQM. In this case, the offset
compensation for LO cancellation can be made with the use of the digital offset control in
the DAC.
Figure 17
input level.
Figure 18
input level.
The auxiliary DACs can be used to control the offset in a precise range or with precise
steps.
Figure 19
1.7 V
Fig 17. An example of a DC interface to a 1.7 V
Fig 18. An example of a DC interface to a 3.3 V
i(cm)
common mode input level.
provides an example of a connection to an AQM with a 1.7 V
provides an example of a connection to an AQM with a 3.3 V
provides an example of a DC interface with the auxiliary DACs to an AQM with a
IOUTN
IOUTN
IOUTP
IOUTP
Rev. 01 — 26 May 2009
IOUTP/IOUTN
V
V
IOUTP/IOUTN
V
V
0 mA to 20 mA
o(cm)
o(dif)(p-p)
o(cm)
o(dif)(p-p)
Dual 14-bit DAC, up to 650 Msps, 2 and 4 interpolating
51.1
54.9
1.27 k
= 2.67 V
= 2.75 V
3.3 V
3.3 V
= 1.98 V
= 1.97 V
51.1
54.9
1.27 k
442
442
237
237
BBP/BBN
V
V
BBP/BBN
V
V
i(cm)
i(dif)(p-p)
i(cm)
i(dif)(p-p)
i(cm)
i(cm)
= 1.7 V
= 3.3 V
750
768
= 1.26 V
= 1.5 V
AQM
5 V
AQM
750
768
DAC1408D650
BBP
BBN
BBP
BBN
AQM (V
AQM (V
i(cm)
i(cm)
i(cm)
i(cm)
© NXP B.V. 2009. All rights reserved.
001aaj541
001aaj542
= 1.7 V)
= 3.3 V)
common mode
common mode
32 of 88