Other Parts Discussed in Thread: OPA2356 , OPA2355 , OPA355 , OPA356 , TINA-TI Hello, can anyone tell me the different betwen OPA2356 and the OPA2355?
I can only see that the OPA2356 have no enable.
It is importent, because I want to simulate my circuit…
Frank;
An OPA355 looks OK to me-- see attached TINA circuit. A single-supply transimpedance amplifier works OK-- and you can use the common-mode bias voltage to reverse bias your photodiode. As you can see in the output Total Noise plot, you should…
Hi Frank,
The OPA380 datasheet states, "The OPA380 family of transimpedance amplifiers provides high-speed (90MHz Gain Bandwidth [GBW]) operation, with extremely high precision, excellent long-term stability, and very low 1/f noise. It is ideally suited…
Thank you for your reply, John. The OPA657 desparately needs correcting and upgrading.
I'd suggest that you study the OPA355 macromodel and use it as a guide to what TI's models should be.
The fact that TINA-TI macromodels vary from excellent to…
Suraj,
The circuit below may be a possible starting point.
R1 and R2 bias the input of the op amp at half the power supply voltage. Gain is set to 101 with R3 and R4. C2 rolls off the low frequency response and limits the amplification of offset…
Steve,
We don't have a dedicated model for the OPA356 at this time. The model is in development and should be available on that device's product page no later than next week. A short-term alternative is to use the OPA355 model and tie the model's Enable…
Other Parts Discussed in Thread: OPA355 , OPA846 , OPA842 Hi all,
I am simulating two opamps OPA355 and OPA846.
The circuit is transimpedance amplifier as attached.
I measured DC voltage at VF2. It must be 2.5 V. OPA355, the voltage is 2.5 but…
Other Parts Discussed in Thread: OPA355 CMOS chips such as OPA355 are spec. at 5.5v max ( or +/- 2.75v ) V+ to V- supply voltage, while they listed the absolute max. supply voltage at 7v. I operated them at +/- 3V without a problem. I am wondering is…
Bart,
But pls remember, the signal is already filtered with active filter (1.2MHz LPF) so aliasing is not a concern this is more for stability of OPA355.
Thx, F.
Frank,
You're correct, the BW of the filter should be 1.7MHz. That's the passband bandwidth, you can center it at 1MHz.
Based on the design FilterPro gave you, you'll note that you need a GBW of ~500MHz for the op amps (it drops to ~300MHz if you…
