DK86060-3 Fujitsu Semiconductor America Inc, DK86060-3 Datasheet - Page 20

• Manufacturer Part Number: DK86060-3
• Description: KIT DEV 16BIT DAC FOR MB86060
• Manufacturer: Fujitsu Semiconductor America Inc

Specifications of DK86060-3

• Number Of Dac's: 1
• Number Of Bits: 16
• Outputs And Type: 1, Differential
• Sampling Rate (per Second): 400M
• Data Interface: Parallel
• Dac Type: Current
• Voltage Supply Source: Single
• Operating Temperature: -40°C ~ 85°C
• Utilized Ic / Part: MB86060
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 865-1009

3
The use of dither in data converter applications is not uncommon, where improvements in low-level
performance and reduced effects due to nonlinearities can be achieved. For dither to be used
effectively both amplitude and frequency characteristics must be carefully considered. Obviously the
dither amplitude should be larger than the nonlinearities to be masked, but levels significantly larger
than this will ultimately limit available dynamic range for the wanted signal. Similar considerations
should be made for the frequency characteristics, which in the MB86060 the dither is highpass
filtered such that the majority of the energy is concentrated at Nyquist of the DAC output rate.
In many systems a simple calculation can be used to determine the maximum input signal level for
a given dither amplitude, and in most applications this applies. However, in multi-tone systems such
as discrete multi-tone (DMT) or multi-channel communication systems a more statistical approach
may be adopted where the probability of converter overloads occurring is considered.
The frequency characteristics of the highpass filtered dither is shown in Figure 10.
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Disclaimer: The contents of this document are subject to change without notice. Customers are advised to consult with FUJITSU sales representatives before
Dither Frequency Spectrum
ordering.The information and circuit diagrams in this document are presented “as is”, no license is granted by implication or otherwise.
dB
-100
-10
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-50
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-90
0
Figure 10 Dither Frequency Characteristics
0
MB86060 16-bit Interpolating Digital to Analog Converter
Production
0.2 0.4 0.6 0.8 1.0 1.2
Dither highpass filter response
Frequency
Copyright © 2003-2009 Fujitsu Microelectronics Europe GmbH
1.4 1.6 1.8 2.0
February 2009 Version 2.0
FME/MS/SFDAC1/DS/4250