Check out the VCOM OUTPUT section of the datasheet regarding drive capabilities.
As previously mentioned, a buffer circuit that is not just a simple voltage follower may need to be employed if you are driving a large capacitance directly on the output…
Hello Chuchen,
We have several resources on this topic. The first is a TI Design (TIPD) that discusses the issue in depth. The second resource is a TI Precision Labs Op Amp Video/Slides set explaining the Riso method for maintaining stability with…
Hi Fer Bar,
Try removing the capacitors at the output of the INA122. Capacitive loads can cause a circuit to become unstable. Please see this TI Design on driving capacitive loads http://www.ti.com/tool/TIPD128?keyMatch=tipd128&tisearch=Search-EN. …
Hello Anil,
Thanks for the new schematic and clarification. My only additional comment is that C105 is large and may cause stability issues for the OPA313. According to the OPA313 data sheet (Figure 21) you should reduce it to 50pF to maintain 45degrees…
Hello Daniele,
Here are a few observations and recommendations (in no particular order):
1) I recommend using a 'quiet' analog ground for analog circuitry. It appears as though both the INA and op amp are connected to "DGND", which I assume is a…
Hello,
I believe you are refering to the paragraph on page 14 of the datasheet discussing CAPACITIVE LOAD AND STABILITY. The paragraph states that the OPA322 will remain stable in unity-gain with a pure capactive load of 1nF. Figure 33 shows a graph…
Hello Shihab,
For the INA129, even though the simulation model does not explicitly state that open loop output impedance is modeled, the simulated value (~300 ohms) is relatively close to our estimated calculation (110-200ohms).
For the INA121, however…
Hello Ryuji,
I would expect some gain peaking with the circuit you have described. There are three causes to the gain peaking; a capacitive load of 100pF and 1000pF, large feedback resistor (100kohm), and a capacitor on the inverting input of the op…
Hi, Ron
thanks for your reply. attached is datasheet from customer. pls help check if we ever have TLV2171AIDR part. If we do, do we have PCN from TLV2171AIDR to TLV2171IDR?
A50050077-运算放大器-TI-TLV2171AID(R)-A00.pdf ,
