Romanee
Headphoneus Supremus
- Joined
- May 20, 2004
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Quote:
I don't have the EE education or practical background to adequately answer your note, but I suspect you are making an error in your interpretation of how the LT1210 functions in this system, and in where/what you are measuring. A measurement of uA seems very unlikely to me.
Perhaps you can understand why I am dubious of your results if you read this article by Tangent discussing various virtual ground approaches and solutions, including "I've used Burr-Brown's BUF634 here. It can handle up to 150 mA in the DIP-8 package, and in the larger metal-based packages it can source up to 250 mA..." and "If you need even more than 250mA, the LT1206's big brother, the LT1210, works in a very similar circuit.":
Tangent's Virtual Ground article
If any of our EE-savvy members are reading this, perhaps they can chime in with a little clarifying discussion.
Originally Posted by Andrea /img/forum/go_quote.gif Not to sound pedantic (just for the sake of correct information) -- be aware that the LT1210 in this 3-channel amp doesn't deliver nearly any current at all (its max current output is likely in the uA range, not even mA). So the 1A output capability is completely irrelevant. What makes it better than the previous BUF634 virtual ground driver, must merely be the near-0-ohm output impedance, unlike that of the BUF634 operated open-loop (like here), which is a few ohms, as such much higher even than the Pimeta TLE2426's typical 0.0075 ohm output impedance. |
I don't have the EE education or practical background to adequately answer your note, but I suspect you are making an error in your interpretation of how the LT1210 functions in this system, and in where/what you are measuring. A measurement of uA seems very unlikely to me.
Perhaps you can understand why I am dubious of your results if you read this article by Tangent discussing various virtual ground approaches and solutions, including "I've used Burr-Brown's BUF634 here. It can handle up to 150 mA in the DIP-8 package, and in the larger metal-based packages it can source up to 250 mA..." and "If you need even more than 250mA, the LT1206's big brother, the LT1210, works in a very similar circuit.":
Tangent's Virtual Ground article
If any of our EE-savvy members are reading this, perhaps they can chime in with a little clarifying discussion.