dac1408d750 NXP Semiconductors, dac1408d750 Datasheet - Page 34

• Manufacturer Part Number: dac1408d750
• Description: Dac1408d750 Dual 14-bit Dac; Up To 750 Msps; 2?, 4? Or 8? Interpolating With Jesd204a Interface
• Manufacturer: NXP Semiconductors

NXP Semiconductors
DAC1408D750
Product 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
DAC1408D750 must 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 21
(V
Figure 22
(V
The auxiliary DACs can be used to control the offset in a precise range or with precise
steps.
Fig 21. Example of a DC interface to an AQM with a V
Fig 22. Example of a DC interface to an AQM with a V
i(cm)
i(cm)
) of 1.7 V.
) of 3.3 V.
is an example of a connection to an AQM with a common-mode input level
is an example of a connection to an AQM with a common-mode input level
IOUTnN
IOUTnN
IOUTnP
IOUTnP
All information provided in this document is subject to legal disclaimers.
(1)
(1)
(1)
(2)
(1)
(2)
0 mA to 20 mA
BBP/BBN; V
Rev. 2 — 2 December 2010
IOUTnP/IOUTnN; V
BBP/BBN; V
IOUTnP/IOUTnN; V
V
V
51.1 Ω
54.9 Ω
1.27 kΩ
DDA(3V3)
DDA(3V3)
i(cm)
i(cm)
51.1 Ω
54.9 Ω
1.27 kΩ
= 1.7 V; V
= 3.3 V; V
o(cm)
o(cm)
442 Ω
442 Ω
237 Ω
237 Ω
= 2.67 V; V
= 2.75 V; V
2×, 4× or 8× interpolating DAC with JESD204A
i(dif)(p-p)
i(dif)(p-p)
750 Ω
768 Ω
= 1.26 V
= 1.5 V
o(dif)(p-p)
o(dif)(p-p)
5 V
750 Ω
768 Ω
i(cm)
i(cm)
= 1.98 V
= 1.97 V
of 1.7 V
of 3.3 V
DAC1408D750
BBP
BBN
BBP
BBN
AQM (V
AQM (V
(2)
(2)
i(cm)
i(cm)
001aaj541
001aaj542
= 1.7 V)
= 3.3 V)
© NXP B.V. 2010. All rights reserved.
34 of 98