dac1205d750 NXP Semiconductors, dac1205d750 Datasheet - Page 33

• Manufacturer Part Number: dac1205d750
• Description: Dac1205d750 Dual 12-bit Dac, Up To 750 Msps; 4? And 8? Interpolating
• Manufacturer: NXP Semiconductors

NXP Semiconductors
DAC1205D750
Product data sheet
10.14.2 DC interface to an Analog Quadrature Modulator (AQM)
The DAC1205D750 differential outputs can operate up to 2 V
is recommended to connect the center tap of the transformer to a 62 Ω resistor connected
to the 3.3 V analog power supply, in order to adjust the DC common mode to
approximately 2.7 V (see
When the system operation requires to keep the DC component of the spectrum, the
DAC1205D750 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 15
mode input level.
Figure 16
mode input level.
Fig 14. 2 V
Fig 15. An example of a DC interface to a 1.7 V
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
o(p-p)
IOUTnN
IOUTnP
All information provided in this document is subject to legal disclaimers.
(1)
differential output with transformer
(1)
(2)
Rev. 2 — 10 September 2010
0 mA to 20 mA
IOUTnP/IOUTnN; V
BBP/BBN; V
V
51.1 Ω
DDA(3V3)
Figure
IOUTnN
IOUTnP
IOUTnP/IOUTnN; V
Dual 12-bit DAC, up to 750 Msps; 4× and 8× interpolating
i(cm)
51.1 Ω
14).
0 mA to 20 mA
0 mA to 20 mA
= 1.7 V; V
o(cm)
442 Ω
442 Ω
V
= 2.67 V; V
DDA(3V3)
i(dif)(p-p)
o(cm)
V
DDA(3V3)
= 2.7 V; V
768 Ω
100 Ω
100 Ω
= 1.26 V
I(cm)
o(dif)(p-p)
V
AQM
DDA(3V3)
o(dif)(p-p)
62 Ω
768 Ω
= 1.98 V
4:1
001aaj818
= 2 V
DAC1205D750
BBP
BBN
50 Ω
AQM (V
o(p-p)
(2)
. In this configuration, it
i(cm)
001aaj541
= 1.7 V)
© NXP B.V. 2010. All rights reserved.
I(cm)
I(cm)
common
common
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