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5 Evaluation
5.1 Register Programming
Early EVMs (serial number 001 to 050) were assembled with preproduction silicon. To obtain optimum
SNR and SFDR performance at input frequencies above 130 MHz, it is recommended to set the following
registers:
Address Data
x03 x04
xD3 x40
xDB xD0
This change is addressed in production silicon.
Figure 9. TSW1200 GUI Introduction
To start the TSW1200 software, note the following points:
1. Select the ADC type to be used before capturing.
2. For test, select Single Tone FFT plot.
3. For the ADC Sampling Rate, type in the value.
4. Type in the ADC Input Frequency. Auto calculation of the input frequency depends on the FFT record
length. As soon as the number is entered, the software calculates the coherent input frequency
corresponding to that FFT length. This frequency signal must be supplied through the signal generator.
5. Select the FFT Record Length.
6. Select Capture to obtain the plot
7. The Continuous Capture option is used if the user wants to continuously capture the FFT.
Adjust the input level signal to attain the dBFs of approximately -1.
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SLWU067C–November 2009–Revised May 2012 ADS41xx/58B18EVM
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