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Hi,
Finally made my BIII in Dual-Mono work...sound got more adult than stereo version...input is a directly connected Waveio-card. I ise theisolator of the Wave-io which needs 3.3v 20mA powered from a sep psu currently. Is this the best setup ? Or should this chip not get his 3.3v from the BIII and become part of the dac ground and psu noise wise ? And if it should get the 3.3v from the BIII from where ?
Best Regards
Frank
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I just ordered 2 prototype boards. One with a NVE IL715 like the Wave-IO and one with the iso 7640 mentioned in the Amanero manual. These digital isolator have 2 isolated power and ground domains and you do not want to connect either from the USB domain to the digital domain on the DAC. One source of 3.3V and GND on the Buffalo boards is the I2C input. I have been using this connectors for driving the 3.3V connection on the Adum1250 I am using to isolate and level adapt my arduino controller and that works fine. The NVE datasheet lists 150mw max power dissipation. It would be great to know whether the regulator driving this connector on the Buffalo board can support that type of power requirement. Cheers Thomas Edited by user Sunday, January 13, 2013 2:40:54 AM(UTC)
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Originally Posted by: thomaspf  The NVE datasheet lists 150mw max power dissipation. It would be great to know whether the regulator driving this connector on the Buffalo board can support that type of power requirement.
No, it's 75mA max.
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Originally Posted by: LeonvB Originally Posted by: thomaspf The NVE datasheet lists 150mw max power dissipation. It would be great to know whether the regulator driving this connector on the Buffalo board can support that type of power requirement.
No, it's 75mA max. 150mW is power unit. To know intensity, you must apply Ohm's law. 150mW/3,3V=45,45mA. Regards
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Since we seem to be in show-off mode let's add one more :-) 150mW is for both sides of the chip. One half is powered by the USB side which leaves 1/2 * 45.45mA on the 3.3V connectors on the Buffalo. Coming back to the original question. Can the regulator on the Buffalo drive that much? Cheers Thomas Edited by user Sunday, January 13, 2013 10:19:22 PM(UTC)
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