Part Number: OPA328 Other Parts Discussed in Thread: TIDA-01055 , REF35 , OPA388 Tool/software: Hello TI support,
We are going to use OPA328 for SAR reference buffer circuit. I gone through TI design, TIDA-01055 and document "Do-it-yourself: Three Ways…
Part Number: OPA837 Other Parts Discussed in Thread: OPA625 , TIDA-01055 I was wondering about the common-mode input range of the OPA837 when used as a reference buffer for an ADC.
The TIDA-01055 compares the OPA625 with the OPA837 as a lower power…
Hey Frank,
There was quite a lot of composite reference buffer circuit work going on some time back on a few of the SAR ADC demo designs, One such is here where the idea is you get the precision with the front end amplifier and support the sampling…
So Kevin, in your current circuit with the OPA725 inverting gain of -1 to generate the -2.5V, that op amp output with no series R and no cap at the VREFN pin will see a sampling glitch due to the closed loop output impedance of the op amp that looks inductive…
Hi Shreeneet,
There are many solutions to attenuate a signal, please refer to the following app notes and previous queries on TI amplifier forum:
Attenuator Amplifier Design to Maximize the Input Voltage of Differential ADCs
Designing Inverting…
Well Mark, I think you meant to say low phase margin as an attenuator, not phase reversal - if the op amp is unity gain stable, that will be fine unless you introduce a too low feedback pole at the inverting input C.
This comes up enough that I just…
