Part Number: OPA858 Hi Team,
1.The customer use pspice to simulate the open loop gain of OPA858, but it doesn't meet the data in the datasheet, only3.2G.
Here attached is the simulation files and snippet.
opa858_ac_sweep.zip
Test condition mentioned…
Hi Deepak,
We don't have something like this specified in the datasheet because it depends on the nodes around the amplifier so this is not something that would be stated. As for the alternative device, we do not have any device with this high of an output…
Hi Antonio,
I apologize for not getting back to you sooner. I was investigating the circuit that you sent to me because the changes you made seem to make it unstable. However, I have been trying to simulate using single supply like I originally recommended…
Part Number: OPA858 Hi,
We have submitted a PCN to our customer regarding OPA858 wire bonding change (Au→Cu).
Therefore, we have the following inquiries. The customer uses this part as a very high speed TIA and is concerned about the impact of the…
Hi João,
I appreciate your patience while we work through trying to find a solution to the oscillation issues you are seeing, and I appreciate your very detailed responses. Based a previous response, I was under the assumption that when you isolated…
Part Number: OPA858DSGEVM Hi,
I purchased an OPA858DSGVEM board recently.
I tried to connect Split sources, GND, and keep J4 on.
I only used the Negative input (J1) and make the Positive side(J2) floating.
Unfortunately, I cannot get anything from the…
Thanks JC.
Hi Michael,
For our models, when the input range is violated, we have the output go to mid supply as an error condition. Looks like the input is going negative which violates the input range.
In terms of long simulation time and convergence…
Matthew,
Firstly can you check Iq and input bias current in the damaged chip? How it changed from the fresh chip?
To further root cause it, it would be better if you can ship some damaged unit to us. I will contact you separately over email for that. …
Part Number: OPA858 Other Parts Discussed in Thread: THS4541 Hello all,
I am trying to simulate the noise of the following circuit. The circuit has a transimpedance amplifier (TIA - OPA858) and a fully differential amplifier (FDA - THS4541). However, I…