The INAx126 can be operated on power supplies as low as ±1.35 V. Performance remains excellent with power supplies ranging from ±1.35 V to ±18 V. Most parameters vary only slightly throughout this supply voltage range (see Section 6.7). Operation at low supply voltage requires careful attention to make sure that the common-mode voltage remains within the linear range (see Figure 6-5 and Figure 6-6).

The INAx126 operates from a single power supply with careful attention to input common-mode range, output voltage swing of both op amps, and the voltage applied to the Ref pin. Figure 9-1 shows a bridge amplifier circuit operated from a single 5-V power supply. The bridge provides an input common-mode voltage near 2.5 V, with a relatively small differential voltage.

Figure 9-1 Bridge Signal Acquisition, Single 5-V Supply