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…
Hi Keith,
Thanks for your answer.
I will check with hydrophone manufacturer about the output voltage and get back to you.
The built-in preamp is BII- 1092 and it has 30 kHz highpass filter. - : https://www.benthowave.com/products/Specs/BII-1090Datasheet…
Part Number: ADS8900BEVM-PDK Other Parts Discussed in Thread: OPA625 , THS4551
Hello TI Team,
I ordered two ADS8900BEVM-PDK evaluation boards from digikey at the end of july 2021 and unfortunately received the revision A which has no test point header…
Hi Shane,
have you thought about using the OPA837 or OPA625? These OPAmps have very low distortion specs at 100kHz.
By the way, intermodulation can be identified by the appearance of sum and difference frequencies.
Kai
Part Number: PGA281 Other Parts Discussed in Thread: ADS9110 , OPA2320 , THS4551 , OPA2625 , ADS8900B , OPA625 Is there a limitation of drivin SAR ADC directely ( kickback, settling , accuracy ).
In my understanding, a ADC-driver needs higher BW to…
Hi Keith,
Thanks for checking at the bench. I think I understand better after looking at the EVK schematic and probing the voltages. The key is which common mode we are referring to, which is the input of EVK and NOT the input of the ADS8900B and NOT…
Hello Patrick,
The solution on top with the PGA281 buffered with the OPA625 in the inverting configuration could work. However, please place an R-C-R filter between the PGA281 and OPA625 inverting stage of 50-Ohm-10nF-50ohms and 1nF common-mode filters…
Hello,
The best TI device to drive the ADS91xx is either the THS4551 (can be configured as a 'funnel' amp with appropriate resistors) or the OPA625.
The closest device that we have for the PGA is the PGA281, but this part is focused on lower speeds…
Part Number: OPA2192 Other Parts Discussed in Thread: OPA2196 , OPA192 , TINA-TI , ADS7046 , ADS8860 , OPA320 , OPA328 , OPA625
Hi,
we have the above opamp configuration to measure the DC-link voltage in our frequency converter for maritime applications…
Hi Meir,
I have some suggestion.
https://www.ti.com/assets/js/compareParts/compare.html?familyId=1293&parts=OPA838,OPA625,OPA607&cols=o1,p3318,o7,p480,p1261min,p1261max,p23typ,p22typ,p78,p2192,p1typ,p1498,p1192,p2954,p1130,p7typ&lang=en
They are…
