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WuNgUn

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  1. Did you say you have a scope? Im sure you tested the oscillator output already....? If its fine, the chip maybe lost. I have a spare (mounted) 9028 chip sitting here in front of me...just saying.
  2. Do you have schematic? This is the 9018 but Im sure they are same... (9018 uses 80Mhz clock) Are you sure about the voltages required at the clock signal pins? New XLR ES9018 Schematic-diyhifishop.pdf
  3. These oscillators you've tried, were 100mhz variants directly on the DAC, or on the module? Your module, depending on the design, maybe not be able to do 100mhz... But even so, It shouldn't damage the DAC. From experience, if you have a power issue in the middle 6VAC terminal, you will not get lock but the DAC will power up normally. How are you swapping oscillators? Did you add a DIP socket to the DAC? Are you sure you didn't lift a pad or anything?
  4. I recall reading about a blind test on speaker wire...and one of the examples was coat hanger wire... Most couldnt tell coat hanger from Kimber Kable... But its worth testing!
  5. Both the 1.2 (core) and 3.3V rails have a - +5% tolerance. 37mA nominal current on 1.2v core, 7mA nominal current on the digital supply and 25mA on the analog supply. Input capacitance is 10pF
  6. The decoupling or bypassing is already onboard, downstream of the power connection point on the PCB. The high switching currents probably can't be dealt with by a LT series regulator by itself either...that is why regulated psu's make effective use of caps, to compensate for these fluctuations and noise. Am I wrong?
  7. You don't think a high capacity battery (power sag not withstanding) can't keep up with requirements for a low power, low speed I/C?
  8. So there is absolutely no benefit for battery DC supply for a D/A processor (no other devices or components) except for power isolation? How is a rectified and regulated AC/DC supply better for this task than battery power?
  9. Ahh...I see we're both a part of the commonwealth.... But my climate is vastly different than yours right now
  10. That maybe so, but Im not talikng about mosfet's or DC to DC converters or PWM here...a simple low power DC source
  11. Switching circuit??? Seriously? Tell my what makes the powering of the ESS9028 processor a "switching" circuit.. "high current" D/A processor?? Sure....It really sucks the juice! lol Any "pulse" in current is dealt with by using smoothing caps of course
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