DAC1405D750HW NXP [NXP Semiconductors], DAC1405D750HW Datasheet - Page 35

• Manufacturer Part Number: DAC1405D750HW
• Manufacturer: NXP [NXP Semiconductors]

NXP Semiconductors
DAC1405D750_1
Preliminary data sheet
10.14.3 AC interface to an Analog Quadrature Modulator (AQM)
The constraints to adjust the interface are the output compliance range of the DAC and
the auxiliary DACs, the input common mode level of the AQM, and the range of offset
correction.
When the AQM common mode voltage is close to ground, the DAC1405D750 must be
AC-coupled and the auxiliary DACs are needed for offset correction.
Figure 18
mode input level using auxiliary DACs.
Fig 18. An example of a DC interface to a 3.3 V
provides an example of a connection to an AQM with a 0.5 V
IOUTnN
IOUTnP
AUXnN
AUXnP
All information provided in this document is subject to legal disclaimers.
(1)
(1)
(2)
BBP/BBN; V
IOUTnP/IOUTnN; V
Rev. 01 — 10 March 2010
V
54.9 Ω
634 kΩ
442 kΩ
DDA(3V3)
Dual 14-bit DAC, up to 750 Msps; 4× and 8× interpolating
i(cm)
54.9 Ω
634 kΩ
442 kΩ
= 3.3 V; V
o(cm)
237 Ω
237 Ω
= 2.75 V; V
i(dif)(p-p)
750 Ω
= 1.5 V; offset correction up to 36 mV
o(dif)(p-p)
I(cm)
5 V
AQM using auxiliary DACs
750 Ω
= 1.96 V
DAC1405D750
BBP
BBN
AQM (V
(2)
i(cm)
001aaj544
= 3.3 V)
© NXP B.V. 2010. All rights reserved.
I(cm)
common
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