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Dears,
I want to design a signal sampling circuit, the circuit use the INA128 to achieve the function. I want to konw whether influnce the INA128's performance that I used the asymmetry supply power(+24 and -5V). Many thanks!
Best regards!
Jacking
Jacking,
INA128 does not have an internal ground so it may be used with any supplies as long as the total supply voltage, Vcc-Vee, is between 4.5V (+/-2.25V) and 36V (+/-18V) – see datasheet table below:
Therefore, you may use INA128 in single, dual or asymmetric supply as long as you do NOT violate input common-mode or output voltage linear range as specified in the datasheet with respect to its rails - see below:
Please be aware that since the output voltage is also a function of the differential input voltage, gain, reference and supply voltage, in order to assure that the output operates within its linear range, the linear input range may be limited as shown in graphs below:
Here are additional graphs of Vcm vs Vout for your supply voltage and random Vref and Gain.
In order to generate the Input Common-Mode Range vs Output Voltage graph for your specific Vref, Gain and Vcm, please first install the INA_CMV_CALC by clicking on the link below and then use it to generate the plot like the ones shown above.
