DAC1205D650HW/C1 NXP [NXP Semiconductors], DAC1205D650HW/C1 Datasheet - Page 35

• Manufacturer Part Number: DAC1205D650HW/C1
• Manufacturer: NXP [NXP Semiconductors]

NXP Semiconductors
DAC1205D650_1
Product data sheet
10.14.3 AC interface to an AQM
When the Analog Quadrature Modulator (AQM) common mode voltage is close to ground,
the DAC1205D650 must be AC-coupled and the auxiliary DACs are needed for offset
correction.
Figure 18
input level using auxiliary DACs.
Fig 19. An example of an AC interface to a 0.5 V
provides an example of a connection to an AQM with a 0.5 V common mode
IOUTnN
IOUTnP
AUXnN
AUXnP
(1)
(1)
(2)
0 mA to 20 mA
1.1 mA (typ.)
BBP/BBN; V
IOUTnP/IOUTnN; V
Rev. 01 — 28 July 2009
66.5
Dual 12-bit DAC, up to 650 Msps; 2 4 and 8 interpolating
3.3 V
i(cm)
66.5
= 0.5 V; V
o(cm)
10 nF
10 nF
= 2.65 V; V
i(dif)(p-p)
2 k
174
34
= 1.96 V; offset correction up to 70 mV
o(dif)(p-p)
5 V
i(cm)
AQM using auxiliary DACs
2 k
174
34
= 1.96 V
DAC1205D650
BBP
BBN
AQM (V
(2)
i(cm)
001aaj589
= 0.5 V)
© NXP B.V. 2009. All rights reserved.
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