AD8541 revG datasheet say
Regarding about Large Signal Voltage Gain
Avo= 100V/mV @ Vs=2.7V, 3.0V
but Avo=20V/mV @ Vs=5.0V
Load is 100Kohm, so these are not a big difference, I think.
Could I see the "Avo vs Vs" feature?
AD8541 is stable with supplies between 3V and 5V. Just take note that the Avo is not scaled up to the rails because there is always a headroom from the supplies of at least 500mV.
Hope this helps. Happy New Year!
Why do you need to know the "Avo vs Vs" feature? Is this critical to your application?
I beleve in ADI datasheet.
This Avo feature is changed by Vs drastic.
So I would like to know changing point.
"The AD8541/AD8542/AD8544 are optimized to maintain high gains at lower supply voltages, making them useful for active filters and gain stages. "
Does it control by the switch?
According to the applications engineer of AD8541,
"The AD854x data sheet is a little surprising to me as well. We usually change Vo conditions with respect to different supply voltage. For example, take a look at the ADA4661-2.
Vout is set to be 1.5V from the rails.
There is no strict rule of determining Vo as far as I know. Vos vs Vout graph usually suffers and takes off at both ends. So, having a narrower range of Vout usually gives a better Avo number. In most of our newer data sheets, Vo scales with Vsy. We would choose Vo to be 0.5V – 1.5V away from the rails and measure delta Vout / delta Vos."
Hope this helps.
Thank you very much for your help.
Avo will change between Vs=3.0V to 5.0V, I think.
Is it OK to use at Vs=4.0V ? Is it unstable?
Avo was changed only 10 times .
It might not a big change...
Could you make sure that the device is stable between 3.0 and 5.0V?
Thank you very much for your support.
I heard it and felt easy.
Your information is helpful for me.
Happy New Year!
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