Datasheet

DAC1405D750 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2012. All rights reserved.
Product data sheet Rev. 5 — 31 January 2012 34 of 43
NXP Semiconductors
DAC1405D750
Dual 14-bit DAC, up to 750 Msps; 4 and 8 interpolating
Figure 16 provides an example of a connection to an AQM with a 3.3 V
I(cm)
common-mode input level.
The auxiliary DACs can be used to control the offset in a precise range or with precise
steps.
Figure 17
provides an example of a DC interface with the auxiliary DACs to an AQM with
a 1.7 V
I(cm)
common-mode input level.
Fig 16. An example of a DC interface to a 3.3 V
I(cm)
AQM
Fig 17. An example of a DC interface to a 1.7 V
I(cm)
AQM using auxiliary DACs
001aaj542
54.9 Ω
54.9 Ω
237 Ω
237 Ω
V
DDA(3V3)
IOUTnP
IOUTnN
BBP
BBN
AQM (V
i(cm)
= 3.3 V)
750 Ω 750 Ω
5 V
1.27 kΩ 1.27 kΩ
(1)
IOUTnP/IOUTnN; V
o(cm)
= 2.75 V; V
o(dif)(p-p)
= 1.97 V
(2)
BBP/BBN; V
i(cm)
= 3.3 V; V
i(dif)(p-p)
= 1.5 V
(1) (2)
001aal655
51.1 Ω
51.1 Ω
442 Ω
442 Ω
V
DDA(3V3)
IOUTnP
IOUTnN
0 mA to 20 mA
BBP
BBN
AQM (V
i(cm)
= 1.7 V)
698 Ω 698 Ω
51.1 Ω 51.1 Ω
AUXnP
AUXnN
1.1 mA (typ.)
(1)
IOUTnP/IOUTnN; V
o(cm)
= 2.67 V; V
o(dif)(p-p)
= 1.94 V
(2)
BBP/BBN; V
i(cm)
= 1.7 V; V
i(dif)(p-p)
= 1.23 V; offset correction up to 50 mV
(1) (2)