DAC1205D650HW/C1,5 NXP Semiconductors, DAC1205D650HW/C1,5 Datasheet - Page 32

• Manufacturer Part Number: DAC1205D650HW/C1,5
• Description: IC DAC 12BIT 650MSPS DL 100HTQFP
• Manufacturer: NXP Semiconductors

Specifications of DAC1205D650HW/C1,5

• Settling Time: 20ns
• Number Of Bits: 12
• Data Interface: SPI™
• Number Of Converters: 2
• Voltage Supply Source: Analog and Digital
• Power Dissipation (max): 1.4W
• Operating Temperature: -45°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 100-TQFP Exposed Pad, 100-eTQFP, 100-HTQFP, 100-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 935286777518

NXP Semiconductors
DAC1205D650
Product data sheet
10.14.1 Basic output configuration
10.14.2 DC interface to an AQM
10.14 Output configuration
The use of a differentially-coupled transformer output provides optimum distortion
performance (see
addition, it helps to match the impedance and provides electrical isolation.
The DAC1205D650 can operate up to 2 V
is recommended to connect the center tap of the transformer to a 62 Ω resistor connected
to the 3.3 V analog power supply, in order to adjust the DC common mode to
approximately 2.7 V (see
When the system operation requires to keep the DC component of the spectrum, the
DAC1205D650 can use a DC interface to connect to an Analog Quadrature
Modulator (AQM). In this case, the offset compensation for LO cancellation can be made
with the use of the digital offset control in the DAC.
Figure 15
input level.
Fig 13. Differential output with transformer; V
Fig 14. Differential output with transformer; V
provides an example of a connection to an AQM with a 1.7 V common mode
All information provided in this document is subject to legal disclaimers.
Figure 13 “Differential output with transformer; V
Rev. 2 — 13 September 2010
Dual 12-bit DAC, up to 650 Msps; 2× 4× and 8× interpolating
Figure 14 “Differential output with transformer; V
IOUTnN
IOUTnP
IOUTnP/IOUTnN; V
IOUTnP/IOUTnN; V
IOUTnN
IOUTnP
0 mA to 20 mA
0 mA to 20 mA
0 mA to 20 mA
0 mA to 20 mA
V
DDA(3V3)
o(cm)
o(cm)
V
o(p-p)
DDA(3V3)
V
V
DDA(3V3)
DDA(3V3)
= 2.8 V; V
= 2.7 V; V
o(dif)(p-p)
o(dif)(p-p)
100 Ω
100 Ω
differential outputs. In this configuration, it
50 Ω
50 Ω
V
DDA(3V3)
2:1
o(dif)(p-p)
o(dif)(p-p)
62 Ω
= 1 V
= 2 V
4:1
001aaj817
001aaj818
50 Ω
= 1 V
= 2 V
DAC1205D650
50 Ω
o(dif)(p-p)
© NXP B.V. 2010. All rights reserved.
o(dif)(p-p)
= 1
V”). In
= 2
32 of 43
V”).