Hi Scarlett,
running the
yields this result:
Looks still acceptable?
Kai
Scarlett,
I would agree with Kai's results, the output still looks acceptable:
In INA214 ds, the maximum capacitive load is 1nF. if customer use RC at output (100ohm 0.01uF), do you see any issue?
Generally putting a resistance of 100Ω is sufficient to suppress ringing in the circuit. In addition to Kai's simulation, here is a slightly simplified form of the same circuit:
The output with an input step applied to the input was as follows:
As you can see, there is a small amount of overshoot on the output (on the order of 20mV) but there is no ringing on the output.
Another question is how to calculate the bandwidth in their case?
The cutoff frequency of the RC filter will be much higher (at around 160kHz) than that of the device, so the frequency response will be almost unchanged from what is shown in the datasheet:
This can also be simulated:
The -3Db frequency here is located at approximately 47kHz.
Levi DeVries
