HI5741-EVS Intersil, HI5741-EVS Datasheet - Page 8

• Manufacturer Part Number: HI5741-EVS
• Description: EVALUATION PLATFORM HI5741
• Manufacturer: Intersil

Specifications of HI5741-EVS

• Number Of Dac's: 1
• Number Of Bits: 14
• Outputs And Type: 1, Differential
• Sampling Rate (per Second): 100M
• Data Interface: Parallel
• Settling Time: 20ns
• Dac Type: Current
• Voltage Supply Source: Analog and Digital, Dual ±
• Operating Temperature: -40°C ~ 85°C
• Utilized Ic / Part: HI5741
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Evaluating Multi-Tone Power Ratio (MTPR)
Performance
For cellular base station users, the HI5741 evaluation
module provides accessibility to the digital inputs via the
edge connector. Unlike DDS applications, base station users
provide multi-tone inputs to the DAC, and evaluate the
dynamic range performance under these conditions.
In testing for MTPR, a ten tone pattern is created and input
to the HI5741 at a clock frequency of 20MHz. One tone
(typically the fifth) is removed in order to observe the third
order harmonic products (2f1-f2, 2f2-f1,etc.) created by the
DAC in the resulting ‘dead zone’. The multi-tone power ratio
of the device is then measured as the dynamic range from
peak power to peak distortion.
PERSONAL COMPUTER
SOFTWARE
INCLUDED
CIRCUIT
CLOCK
FIGURE 16. INTERSIL HI5741/DDS EVALUATION SYSTEM SETUP BLOCK DIAGRAM
3-8
NCOM EVALUATION BOARD
HSP-EVAL/HPS45116
PC INTERFACE
NUMERICALLY
CONTROLLED
OSCILLATOR
HSP45116
Application Note 9626
Figures 17 and 18 graphically illustrate two examples of test
patterns used to evaluate MTPR performance on the
HI5741. In figure 17, a ten tone pattern is used with tones
ranging from 2MHz to 3MHz with 100kHz tone spacing.
Figure 18 illustrates a similar pattern, however 40kHz tone
spacing is used. In both cases, the fifth tone has been
removed to observe the third order harmonic products and
the amount of distortion they introduce into the spectrum.
+5V
DAC MODULE
SUPPLY
POWER
HI5741
HI5741
DAC
-
5.2V
SPECTRUM ANALYZER
CABLE
50
SMA