ZHCSJN1C September 2000 – September 2022 INA118
PRODUCTION DATA
The inputs of the INA118 are individually protected for voltages up to ±40 V. For example, a condition of –40 V on one input and +40 V on the other input does not cause damage. Internal circuitry on each input provides low series impedance under normal signal conditions. To provide equivalent protection, series input resistors contribute excessive noise. If the input is overloaded, the protection circuitry limits the input current to a safe value of approximately 6 mA. Figure 7-12 shows this input current limit behavior. The inputs are protected even if the power supplies are disconnected or turned off.