berger.h
Full Member level 1
I'd like to clarify a few things about the choice of operational amplifiers
I borrowed the scheme published here on the forum
The author used exclusively AD8620 amplifier, unfortunately pricing policy of European distributors (Farnel, Mouser TME) makes it a very expensive.
The question is where would be cheaper to use other amplifiers without appreciable loss parameters
Red stage
It si Instrumentaton amplifier
suppose the requirement for minimum input current
Power supply +-5V - +-8V
maximum amplify 20x
and input frequence DC-100kHz
input voltge level 0 - +-1,25V
Green stahe is 4th LPF on 100kHz
Amplifier have A=1x
Blue Stage,
Inverting ampélifier and level shifter
make from +-1,25V 0-2,5V
Which amplifier AD8620 is possible in this design to replace cheaper, without a significant loss of properties of the whole chain?
**broken link removed**
I borrowed the scheme published here on the forum
The author used exclusively AD8620 amplifier, unfortunately pricing policy of European distributors (Farnel, Mouser TME) makes it a very expensive.
The question is where would be cheaper to use other amplifiers without appreciable loss parameters
Red stage
It si Instrumentaton amplifier
suppose the requirement for minimum input current
Power supply +-5V - +-8V
maximum amplify 20x
and input frequence DC-100kHz
input voltge level 0 - +-1,25V
Green stahe is 4th LPF on 100kHz
Amplifier have A=1x
Blue Stage,
Inverting ampélifier and level shifter
make from +-1,25V 0-2,5V
Which amplifier AD8620 is possible in this design to replace cheaper, without a significant loss of properties of the whole chain?
**broken link removed**