Mosaic
Well-Known Member
Hi,
Just thought I'd ask for a better way to power an MCU with a <1% error 5VDC Vreg.
The regular 7805 types have a lot more error and it can cause drift when doing ADC sampling.
I don't have a spare pin to apply a Vref, so...it's a power supply solution I am looking for.
I suppose I can 'float' the 5Vreg to 5.25V and then have another lower pwr Precision Zener or something like that delivering a good 5VDC to the MCU?
Please advise!
Thx.
EDIT: I am considering swapping the LM2937 (5%) for a MIC5209 (1%) unit. But the +60/-50V transient tolerance of the 2937 for my auto app has me in a dilemma.
Just thought I'd ask for a better way to power an MCU with a <1% error 5VDC Vreg.
The regular 7805 types have a lot more error and it can cause drift when doing ADC sampling.
I don't have a spare pin to apply a Vref, so...it's a power supply solution I am looking for.
I suppose I can 'float' the 5Vreg to 5.25V and then have another lower pwr Precision Zener or something like that delivering a good 5VDC to the MCU?
Please advise!
Thx.
EDIT: I am considering swapping the LM2937 (5%) for a MIC5209 (1%) unit. But the +60/-50V transient tolerance of the 2937 for my auto app has me in a dilemma.
Last edited: