Just curious if anyone used AD5263 to replace normal pots on prefabricated tone boards? I tried AD5206 and MCP4341, used in feedback loop for OP amp they work fine, but not all of those ready made boards offer gain control via feedback resistance, so they just don't work as drop in replacement.
The reason I am trying AD5263 now is because it is quad potentiometer and the only one that can operate at +15V from AD range. It has digital and analog supply separated. So I'm wondering if someone used it with success and has any design tips?
The reason I am trying AD5263 now is because it is quad potentiometer and the only one that can operate at +15V from AD range. It has digital and analog supply separated. So I'm wondering if someone used it with success and has any design tips?
With a voltage range of +/- 5V it could be an issue with +/-15V circuitry - in practice it would mean using +/-5V throughout and rail-to-rail opamps. Note that although its 0..15V single rail it is not +/-7.5V compatible AFAICT from the datasheet.
For audio use its preferable to use zero-crossing digipots to reduce zipper noise. (These only update on a zero-crossing on the signal path, so are inherently dual-supply chips).
Standard Baxandall tone circuits use linear pots so should be compatible, as is the Baxandall volume circuit, but log-law volume controls are an issue for digitpots - there are some log-law ones but the availability is more limited.
For audio use its preferable to use zero-crossing digipots to reduce zipper noise. (These only update on a zero-crossing on the signal path, so are inherently dual-supply chips).
Standard Baxandall tone circuits use linear pots so should be compatible, as is the Baxandall volume circuit, but log-law volume controls are an issue for digitpots - there are some log-law ones but the availability is more limited.