To use the output noise from simulation, you will have to first check the cutoff frequency of the circuit by running the AC response:
In simulation, the cutoff frequency is around 10kHz compared to estimated 1/2piRC of 15kHz. This is…
Part Number: OPA657 Hi,
We use OPA657 circuit as TIA amplifier. Our output signal is on the following output.
Our circuit is on the following picture
How can we prevent sinusoidal responses on digital pulse?
Part Number: OPA657 we designed a LIDAR circuit and we use OPA657 as a TIA. When the transmitter signals received by TIA, there are some spikes on it. How can solve this situation? I will send circuit diagram and output wave shape soon.
Part Number: OPA657 Hi Ti Team
At the output of OPA657, we are getting a second harmonic peak which is degrading our SFDR. PFB CRO observation and schematic for your reference
we have tried following few things but no improvement in 2nd harmonics
Part Number: OPA657 Other Parts Discussed in Thread: OPA656 My customer wants to know the difference between OPA657N/250 and OPA657N B /250. Are there any spec difference ? Customer can replace from OPA657N/250 to OPA657 N B /250 directly ? Please let us know if…
Thank you for the snapshot. If you are still running into the second error, here is a PSpice for TI project of the same schematic setup that only gives the first error about importing a third party model which you can ignore. I am not getting…
Part Number: OPA657 Other Parts Discussed in Thread: TINA-TI Hi Team,
I want to get loop gain Bode by TINA-TI. The precision lab video taught the non-inverting amplifier circuit like this picture.
But I can't figure out how to build the circuit to simulate…
Part Number: OPA657 Hello all,
I am facing difficulty in using pspice model for OPA657 in my simulations using pspice for ti. What I did was download pspice model for OPA657 available in the technical documents section of the project page and tried to…
It works but I am not sure if it is optimal.
As I mentioned, you may want to use the largest possible Rf. Higher Rf will result in high SNR. But be sure that the dynamic range of photocurrent multiplied by Rf is still within the output…