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PSoC 4 MCU

Anonymous
Not applicable

Hello all,

   

I am trying to amplify low level signal by using Programmable Gain Amplifier (PGA)

   

 

   

but for Psoc 4 BLE there is no Such PGA component in psoc Creator.

   

but it is available for PSoc3 Devices.

   

does name of PGA name is changed for PSOc 4 ble or is there any alternative component for PGA..

   

 

   

 

   

Thanks in advance

   

Amol

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1 Solution
Esteemed Contributor II

There is no pga for PSoC4. You may use an OpAmp component and connect some resistors externally to adjust for the needed gain.

   

 

   

Bob

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2 Replies
Esteemed Contributor II

There is no pga for PSoC4. You may use an OpAmp component and connect some resistors externally to adjust for the needed gain.

   

 

   

Bob

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Esteemed Contributor

One way of making a PGA, SAR is set to use bypassed Vref in order

   

to get Vref for OpAmp. You can change the mux to switch the fdbk

   

loop. Might get a little less G error due to Mux Rdson. And better Zin

   

to the OpAmp. Also mux allows more than one switch on at a time so

   

possible to get 16 gains out of 4 R's.

   

 

   

Don't forget to bypass P1_7, the ref bypass option of SAR.

   

 

   

Regards, Dana.

   

 

   

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