surno
Junior Member level 3

Hi, everyone.
Today I tested DAC chip that is designed DAC. I composed evaluation board ADC, designed DAC and low pass filter with 20MHz bandwidth because of reject high frequency noise.
The test result,, output waveform is good but SFDR is bad. I want to improve SFDR factor. How can I improve SFDR factor by changing a LPF?
Today I tested DAC chip that is designed DAC. I composed evaluation board ADC, designed DAC and low pass filter with 20MHz bandwidth because of reject high frequency noise.
The test result,, output waveform is good but SFDR is bad. I want to improve SFDR factor. How can I improve SFDR factor by changing a LPF?