Texas Instruments ADS1610EVM, User Manual

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Using the EVM
Figure 3 is a screen shot of the TSW1100 front panel.
Figure 3. TSW1100 Screen Shot
Using the TSW1100 software, perform the following steps.
1. Select ADS1610 from the TI Chip pulldown menu.
2. Set Sampling Rate : 10 MHz (if modulator clock is 60-MHz oscillator)
3. Set Waveform (Fin) frequency to test frequency; then set ARB to the frequency shown in this field.
4. Select Channel 1 from the Data Capture Selector pulldown menu. If it appears grayed out, select
another channel, and then select channel 1. It should appear enabled.
5. Set data samples to 65536 from default 16384
6. Select Power Spectrum from the PLOT pulldown menu.
7. Set FFT Window Type to NONE.
8. Click Acquire Data. After data is captured and processed, check to see if dBFS field reads
approximately –6 dB. If not, adjust the signal amplitude, and then click Acquire Data. Do this until
dBFS is approximately –6dB.
9. Once the signal amplitude is 6 dB less FS, select Hanning from the FFT Window Type.
10. Notice SFDR, THD, and SNR. The results should be similar to those shown in the following figures.
Figure 4 through Figure 8 are typical test results at different input frequencies using an Valpey Fisher
oscillator (60 MHz) and the TSW1100 data capture board. The analog input signal is from a HP 33120A
ARB and was band-pass filtered before being applied to J4 on the ADS1610EVM.
SLAU180A – May 2006 – Revised August 2006 ADS1610EVM 9
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