18. Replace DAC xxxx with DAC xxxx



First removing the old parts - it's a hard to job to throw away a working circuit.




The settle node placed in the copper house. Massive DAC ground.




DAC will come on sockets, allows to change the DAC and gives also a change to test other types of DAC's.










Compensation - (order changed, without description)






















Capacitors in Comparison






First tests with different types of OP amps


Today I used my 7904A with the blue P11 Phosphor - I like changing the scopes often.


Amplifier xxxx





Amplifer xxxx together with DAC xxxx

Load DAC exactly on first division
 - settling time approximately 1.9 µs -
7A26 in 20 MHz position - 500µV/DIV on settle node




Amplifier xxxx







Amplifier xxxx together with DAC xxxx

Load DAC exactly on first division
- settling time approximately 2.3 µs -
7A26 in 20 MHz position - 500µV/DIV on settle node




Amplifier xxxx






Amplifier xxxx together with DAC xxxx

Load DAC exactly on first division
- settling time approximately 1.8 µs -
7A26 in 20 MHz position - 500µV/DIV on settle node



"Under such a 16 Bit microscope you see everything, with a standard oscilloscope you are blind".


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Impressum und Haftungsausschluss