Brian,
I agree with Clemens, in that you are running outside the common mode range. When violating the common mode range the amplifier will not function like a normal op amp and the output can be unpredictable. The recommended replacement OPA4991-EP…
Hey Alex,
You can just use the OPA2991 model found on the product page, the model is available for all channel variants: single (OPA991) and quad (OPA4991).
Thanks for clarifying the cable length capacitance (either 600p or 2500pF), either way I…
Part Number: OPA991 Other Parts Discussed in Thread: OPA4991 , TINA-TI
Hi Team, seeking your assistance.
The opamp being used is an OPA4991, but I would like to refer to the single OPA991 to make my question easier.
The first stage on the whole…
Hey Fabrice,
https://www.ti.com/amplifier-circuit/op-amps/general-purpose/products.html#1192=-55%3B125&1261max=30%3B45&
Please find the above parametric search with your supply range and operating temperature. Now, LM108AH will have lower max offset…
Is it possible to send you my schematic for review? I have attached it to this post. I am considering using OPA4991 to buffer VCM from the adc separately for each adc input. I am just not sure if that is necessary since any crosstalk between the channels…
Part Number: TL3474A Other Parts Discussed in Thread: OPA4991 , TLV9354 Hi team,
In this IC's datasheet, there is only tRθJA in absolute maximum ration table.
Would you tell me other thermal parameters( ψJT, RθJC(top) , RθJB etc) except tRθJA of TL3474AIDR…
Hey Tim, so I was looking at the OPA4990 - drilling down to the ordering page, is the POPA prefix correct,
And then the OPA4991 is in preview and it also shows that new (or wrong) POPA prefix
Hi Nuno,
I have found these here:
https://www.ti.com/assets/js/compareParts/compare.html?familyId=1293&parts=OPA4196,OPA4191,OPA4171-Q1,OPA4171,TLV4171,OPA4130,TLV9154-Q1,OPA4991-Q1,TLV9154,OPA4991,TLV9354-Q1,TLV9354,TLV2444,TLV2444A,LMP7704&cols…
Hey Krishna,
Were you unable to sample from the web directly?
On the product page https://www.ti.com/product/OPA4991 , in the ordering and quality section, you can click request sample and receive a small number of samples online.
If this does…
Part Number: OPA2171 Other Parts Discussed in Thread: OPA4171 , , OPA4991 , OPA2991 , OPA2990 , OPA171 Hi Team,
We have received this inquiry from our customer,
I have been using this opamp as well as opa2171 and opa4171 as it was advised by a member…
