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INA197: understanding output voltage specifications

Part Number: INA197

Dear all,

I have a question about the output voltage specifications reported in the datasheet of INA197.

In particular it is not clear if the output voltage can go to 0V (or very close to 0V) because in the datasheet is reported that:

1. with Vs<Vcm<=80V --> Vout,min = 300mV typ (with Vsense<20mV)

2. with 0<=Vcm<=Vs --> Vout,min = 1V max (with Vsense<20mV and Vs=5V)

3. Swing to ground --> Vout,min = Vgnd+50m (not written but obviously Vsense<20mV)

So, the questions are:

- if I have Vs=7.2V, Vcm=0.5V and Vsense=0V, what is my Vout? Points 2 and 3 are in contrast

- if I have Vs=7.2V, Vcm=12V and Vsense=0V, what is my Vout? Points 1 and 3 are in contrast

  • Hello Lorenzo,

    Thank you for using the TI forum. The “Swing to GND” characteristic (your point 3) does not show the output at a near zero differential, but rather how close the output gets to ground with a hard driven negative differential for the specified load. Therefore, to answer your question, you will use the information from your points 1 and 2 to determine the output characteristics at a near zero differential.