The INA2128 can be operated 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 6.6. Operation at very low supply voltage 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. Typical performance curves, Figure 6-5 and Figure 6-6, show the range of linear operation for ±15-V, ±5-V, and ±2.5-V supplies.