SM,
You typically should calculate the noise refered to input, RTI, and then multiple it by the gain to refer to the output, RTO.
Doing so, for G=500, you will get: Vnoise RTI = [(8^2)+(80/500)^2]^0.5 = 8.0016nV/rt-Hz, which is in line with your…
Hello Degu,
This is similar to a TI Precision Design that we have. You may find some if it helpful. Here is the link: http://www.ti.com/tool/tipd175
Note that the layout is important...make the input traces as short and balanced as possible. Be sure…
Hello John,
Find attached my test benches.
Here are my inputs about the 5 different benches I sent:
OPA313: unsimulable, it's look like there is an error in the model. The simulator give the following message: " ERROR(ORPSIM-15143): Voltage source…
Hello Srinivas,
Since you are comparing calculated and simulation results for the LMC6082 and LMC662 keep in mind that the simulated results are affected by the bias current, bias current offset, and voltage offset are established within the models…
Other Parts Discussed in Thread: OPA392 , OPA391 , OPA328 How do Precision Amplifiers fit into my Power Delivery design?
Overview Presentation:
Precision Amplifiers in Power Delivery - Slide Deck
Featuring designs for Server PSU, Current Sensing…
Hi Eric,
In bio-potential applications like EEG, you will hardly ever utilize the entire full-scale range of the ADC. With gain = 24 and Vref = 4.5V, your LSB size for the ADC is already (2*4.5)/24 / 2^24 = 22.35nV. Reducing the reference voltage or…
Part Number: TIDA-00951
Hi TI,
We are having problems with the reading of the ADC channel whta comes from the VBUS voltage level. And we have found two different versions of the accomodation signal circuit from VBUS point to the ADC B6 channel. The…
Hello Jacob,
The LMP2011 should not be used for high source impedance (>1Mohm) applications.
The chopping action of the input stage causes charge injection into the inputs, which creates a pulsating current into, and out of, the inputs.
These "dynamic…
Hi Sebastian,
The layout looks clean in general. A couple of suggestions:
On Reference Driver Circuit:
-U4 (OPA376) appears to be missing V+ supply bypass Capacitor. Please use a 0.1uF X7R capacitor.
- U5 (OPA625) appears to be missing V+ supply…
