The INA12x operate on power supplies as low as ±2.25 V. Performance remains excellent with power supplies ranging from ±2.25 V to ±18 V. Most parameters vary only slightly throughout this supply voltage range; see Section 7.6.

Operation at very-low supply voltages requires careful attention to make sure that the input voltages remain within the linear range. Voltage swing requirements of internal nodes limit the input common-mode range with low power-supply voltage. Figure 7-6 shows the range of linear operation for ±15-V, ±5-V, and ±2.5-V supplies.