dac1405d650 NXP Semiconductors, dac1405d650 Datasheet - Page 30

• Manufacturer Part Number: dac1405d650
• Description: Dual 14-bit Dac, Up To 650 Msps; 2? 4? And 8? Interpolating
• Manufacturer: NXP Semiconductors

NXP Semiconductors
DAC1405D650_1
Product data sheet
10.12 Analog output
Table 38.
Default settings are shown highlighted.
The DAC1405D650 has two output channels each of which produces two complementary
current outputs. These allow the even-order harmonics and noise to be reduced. The pins
are IOUTAP/IOUTAN and IOUTBP/IOUTBN respectively and need to be connected via a
load resistor R
For the equivalent analog output circuit of one DAC, refer to
output circuit (one
sources, and their associated switches, for each segment.
The cascode source configuration increases the output impedance of the source, thus
improving the dynamic performance of the DAC by introducing less distortion.
The device can provide an output level of up to 2 V
following stages and the targeted performances.
DAC_OFFSET[11:0]
Decimal
...
0
+1
...
2046
2047
Fig 12. Equivalent analog output circuit (one DAC)
2048
2047
1
Digital offset adjustment
L
to the 3.3 V analog power supply (V
DAC)”. This circuit consists of a parallel combination of NMOS current
Rev. 01 — 4 May 2009
Dual 14-bit DAC, up to 650 Msps; 2 4 and 8 interpolating
AGND
Two’s complement
1000 0000 0000
1000 0000 0001
...
1111 1111 1111
0000 0000 0000
0000 0000 0001
...
0111 1111 1110
0111 1111 1111
DAC1405D650
AGND
IOUTAP/IOUTBP
IOUTAN/IOUTBN
o(p-p)
DDA(3V3)
depending on the application, the
DAC1405D650
).
Figure 12 “Equivalent analog
Offset applied
...
0
+2
...
+4092
+4094
V
4096
4094
2
DDA(3V3)
R L
001aah019
R L
© NXP B.V. 2009. All rights reserved.
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