Other Parts Discussed in Thread: OPA27 Dear sir
i am using OPA27 op-amp as i observed it gives more than 1volt output with 0v at 5mv signal input.
I also tried this op amp with unity gain but output was 1.28 volt.
How i can solve this issues.
i want to…
Eva,
The OPA27 has a GBW of 8MHz. In a gain of 101, this stage will only have a bandwidth of 80kHz. The pole that this creates inside the larger feedback loop is sure to create serious stability problems. The frequency response simulation will likewise…
Other Parts Discussed in Thread: OPA37 , OPA27 I need a hydrophone preamplifier circuit with frequency response in the range of 2Hz to 30 Khz with single voltage supply. The data sheet of OPA37 contains a hydrophone preamp for EDO6166 transducer with frequency…
Other Parts Discussed in Thread: OPA27 I am trying to use the OPA633 buffer to replace Intersil HA3-5002-5Z which is now obsolete. Our product has been in production some time, and we do not want to re-design it yet. The OPA633 is the only device that I…
Albert,
The OPA37 is a so-called decompensated op amp, intended for operation in gains of 5 or greater. It may appear that the resistor ratios put the op amp in sufficient gain for stable operation, but his is not the case. The feedback capacitor, C2…
Peng,
The OPA37 is a decompensated version of OPA27 that is stable only in gain of 5 or greater (see below) while the photo-diode circuit you use is effectively in a unity-gain configuration, which causes instability issue you experience; you need to…
Other Parts Discussed in Thread: OPA227 , OPA27 , OP27 , OPA2227 , OPA2228 , OPA2140 , OPA2376 , OPA141 , OPA376 Hello,
I have a legacy design based on OPA27. The circuitry is prone to RFI rectification problem in high MHz and GHz band. I am planning to replace…
Other Parts Discussed in Thread: OPA177 , OPA27 , OPA277 Iam using Op-amp opa177 for the samll signal amplification purpose. In op-amp opa177 pin no.1 & 8 are used for offset trim. but if I do not want to trim the offset So where should I connect these pin…
Mujahid;
There are a number of things that can cause the output to be influenced by the ambient air-- as you said "Air Con Off". One is simply the thermoelectric potentials caused by dissimilar metals in the input portion of your circuit. Very high gain…
