We were using AD8620 Op Amp in our previous application but now want to use the ADA4857 op amp as integrator / charge amplifier. I have compared the following parameters of both the op amps
|2||Noise (In nV/Sqrt(Hz))||6||4.4|
|3||Gain-Bandwidth product (In MHz)||25||110|
|4||Power supply current / amplifier|
|6||Rail to Rail Out||No||No|
|7||Amplifier per package||2||2|
|9||Temperature (deg C)||–40°C to +125°C||–40°C to +125°C|
|12||Height (In mm)||1.75||1|
|13||Length (In mm)||6.2||4|
|14||Breadth (In mm)||5||3.75|
Should I go ahead with the ADA4857 in our application as charge amplifier?
Do I have to compare any other parameters?
What should be the selection criteria as a charge amplifier/integrator?