Comparison of using OPA2604, 5532, OPA2107 in AD1955Pro DAC

Please check your Dual opamp usuage.

It is use in DC-SERVO.

It should be choose input low offset is the first major.

Are you sure your (old OPA2604) is really REAL one.

I believe my one should be.

Also, LEAD type is better than Lead-Free type of OPA2604.

All of the components can be re-print are also not trust. Even you are using $150, $1500, $15000 to buy this.

My selection op-amp for DC-SERVO is :
Texas Instrument OPA827.

Input offset voltage : 50uV  (OPA2107 is 0.1mV)
Slew Rate : 28V / us  (OPA2107 is 18V /us)
Noise : 3.8nV (OPA2107 is 8nV)

Don't trust too much on other web saying, use real time experiment, like HiFifever, always have data, demo and photo. Otherwise, you will waste alot of money and time.

I was testing the OPA827 last year. Alot of experiment do....

I am sure no one can apply sample if using HK address, also, if using company to apply, TI also will looking for deeply about this.

This new device is not easy to get free samples.

100% SURE.