PSoC 4 MCU

[Anonymous]

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

[JoMe_264151 · Accepted solution]

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

       

Bob

[ETRO_SSN583]

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.