Other Parts Discussed in Thread: OPA2690 Hello,
I read the opa2690 datasheet, and try to understand the following two issues:
1). On page 19, the frequency calculated from equation (6) is about 46 MHz, using C(f)=8.6 pF and R(f)=402 ohms given by the…
Hi Peter,
I checked this and got the same error that you are seeing. The tool is attempting to find an op amp with gain bandwidth greater than 100 times the required bandwidth of the filter. This used to be a common recommendation but it is very conservative…
Well, and taking Kai's file for a start, we can adjust this to a +/-5V OPA2690 solution as thus, we would need to increase the gain for the DC servo path to keep its output in range, that will of course be increasing the NG reducing the BW for the now…
Hi Danilo,
Looks like the OPA690 will meet your requirements, or the OPA2690 if you need the dual package.
OPA690 data sheet, product information and support | TI.com
OPA2690 data sheet, product information and support | TI.com
Best,
Sam
Hello Miranda,
The LMH6612 should certainly be able to meet rise time requirements below 10us, are you saying that when going below 10us the output begins to oscillate?
If you are just looking for a device that can meet the GBW & slew rate requirements…
Look at the OPA2690, similar supplies and speed, and internal topology,
Ignore that 900Mhz on the LMH6609 gain of 1, what you want is the gain of 2 line driver BWof 280Mhz where where the OPA2690 is 220Mhz gain of 2.
Before you get too far with this, I tried to find an internal cross and failed - not sure what this means, but it is unlikely any model updates are available.
The OPA2690 is a similar topology internally, but not as high a supply voltage,
Hi Michael,
Thanks for your inputs. LM6172 is a solid balance between cost and performance for the specifications that we need. We'll take into account your note regarding input noise, as well as consider OPA2690 as an option where we have narrower…
Hi Abhi,
Here is one way to predict the isolation resistor OPA2690 needs for a given cap load using TINA-TI simulation.
I've used the OPA2690 model in simulation and used a large L and large C to open the loop and look for phase margin.
For the simulation…
Other Parts Discussed in Thread: BUF634 , OPA2691 , OPA2690 , LMH6574 Dear Sir
I am using a video buffer BUF634 in between video output and ADC input.
In my application i am getting 4 video outputs, for each output before giving to ADC input i am using BUF634…
