Part Number: OPA858
Tool/software:
Hallo,
I am using 4 opa858 as TIA's for a 4 quad PD that are biased with +11V. Can i supply them with Vs- = -5 V and Vs+ = GND?
I would like to do this to avoid biasing. This is because, I need to sum the signals…
Part Number: OPA858 Other Parts Discussed in Thread: OPA818 , Tool/software: Hi Do you have regular Pspice files for this part? It looks potentially very useful but want to simulate in LTSpice thanks.
Also while we're talking is this the lowest noise TIA…
Part Number: OPA858 Tool/software: I am currently designing a APD+TIA module using the OPA858 and I am interested in seeing the variation in output noise of the module with temperature. I want to simulate the output noise of OPA858 at 92-100C. Is this…
Hello Vincent,
I apologize for the very long delay on the reply. For very high speed TIA applications, we recommend the photodiode be as close as possible to the input of the amplifier to avoid parasitic such as inductance to cause instability to the…
Hello Michael and Jean-Marc,
Thank you for providing the analysis and additional information. I agree that Jean-Marc's calculation of the feedback capacitance in relation to PCB, internal amplifier cap, and photodiode cap, would require the calculated…
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…
Part Number: OPA858 Other Parts Discussed in Thread: TLV3801 , TINA-TI Hi TI
We need to thoroughly examine the transient time characteristics of the OPA858 in relation to the power_down enable/disable feature. Specifically, what is the maximum time it…
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…