dac1205d750 NXP Semiconductors, dac1205d750 Datasheet - Page 35

• 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
10.14.3 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 DAC1205D750 must be
AC-coupled and the auxiliary DACs are needed for offset correction.
Figure 19
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)
Rev. 2 — 10 September 2010
BBP/BBN; V
IOUTnP/IOUTnN; V
54.9 Ω
634 Ω
442 Ω
3.3 V
Dual 12-bit DAC, up to 750 Msps; 4× and 8× interpolating
i(cm)
54.9 Ω
634 Ω
442 Ω
= 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
DAC1205D750
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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