We bought a ADS5231EVM card. Connect with the default instructions.
3.3-V ADC output buffer supply to J17 and return to J18.
3.3-V ADC analog supply to J11 and return to J10.
Use a function generator with 50-W output to input a 45-MHz, 1.5-V offset, 3-V square-wave signal into
J3.
Use frequency generators with a 50-W output to provide a 10.1-MHz, 0-V offset, –1-dBFS amplitude,
sine-wave signal into J15.
At first, ADS5231EVM works well as the following picture. Fetched data are reconstructed into decimal sinusoidal waveform correctly.
After 1 week, the power supply reveals into 'cc' condition. The ADC core power seems okay.
But the output buffer current reached 150mA as the following picture. The clock out pin failed to trigger logic analyzer.
Does any one have any ideas about this phenomenon?
Thank you for any help.
