DAC1405D750HW NXP [NXP Semiconductors], DAC1405D750HW Datasheet - Page 32

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

NXP Semiconductors
DAC1405D750_1
Preliminary data sheet
10.14.1 Basic output configuration
10.13 Auxiliary DACs
10.14 Output configuration
The DAC1405D750 integrates 2 auxiliary DACs that can be used to compensate for any
offset between the DAC and the next stage in the transmission path.
Both auxiliary DACs have a resolution of 10-bit and are current sources (referenced to
ground).
The output current depends on the auxiliary DAC data:
Table 42 “Auxiliary DAC transfer function”
auxiliary DAC data.
Table 42.
Default settings are shown highlighted.
The use of a differentially-coupled transformer output provides optimum distortion
performance (see
helps to match the impedance and provides electrical isolation.
Data
0
...
512
...
1023
AUXP
I
AUXN
Fig 13. 1 V
O AUX
(
)
=
=
=
I
I
Auxiliary DAC transfer function
O AUX
I
O AUX
AUXP
(
o(p-p)
(
AUX[9:0] (binary)
00 0000 0000
...
10 0000 0000
...
11 1111 1111
All information provided in this document is subject to legal disclaimers.
)
)
+
differential output with transformer
×
×
Figure 13 “1 V
I
⎛
⎝
⎛
⎝
AUXN
AUX 9:0
------------------------ -
(1023 A
-------------------------------------------- -
Rev. 01 — 10 March 2010
1023
[
– UX 9:0
1023
IOUTnP/IOUTnN; V
IOUTnN
IOUTnP
Dual 14-bit DAC, up to 750 Msps; 4× and 8× interpolating
]
⎞
⎠
[
o(p-p)
0 mA to 20 mA
0 mA to 20 mA
] )
differential output with
⎞
⎠
o(cm)
shows the output current as a function of the
V
V
DDA(3V3)
DDA(3V3)
= 2.8 V; V
50 Ω
50 Ω
I
0
...
1.1
...
2.2
AUXP
2:1
o(dif)(p-p)
001aaj817
(mA)
50 Ω
= 1 V
DAC1405D750
transformer”). In addition, it
I
2.2
...
1.1
...
0
AUXN
© NXP B.V. 2010. All rights reserved.
(mA)
32 of 43
(6)
(7)
(8)