SPX Noise compared to new generation regulators
How does SPX noise compare with other voltage regulators? See the noise spectra below and judge for yourself. All devices were tested with the same input supply, gain of 1000 measurement amplifier, and spectrum analyzer. All were measured as the AC component of 12VDC output, with no load. The vertical scale of all spectra was lowered by 60dB to adjust for the 1000x gain.
Baseline Test System Noise
new SPX78
Belleson's new SPX has the same low noise as our standard SPZ (below), with about 8µVrms.
SPZ78
Our SPZ has very low noise of about 8µVrms.
Sparkos Labs
Sparkos Labs SS7812 has very low noise, about 6µVrms in our test setup.
LT3045
LT3045 measures just over 2µVrms.
Dexa/NewClassD LC7812 UWB Mk2
Surprisingly, the new Dexa LC7812 UWB Mk2 measures about 110µVrms in our test setup.
TPS7A4700