SBOS632 September 2015 INA188
UNLESS OTHERWISE NOTED, this document contains PRODUCTION DATA.
Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality.
The INA188 measures a small differential voltage with a high common-mode voltage developed between the noninverting and inverting input. The low offset drift in conjunction with no 1/f noise makes the INA188 suitable for a wide range of applications. The ability to set the reference pin to adjust the functionality of the output signal offers additional flexibility that is practical for multiple configurations.
Figure 55 shows the basic connections required for operating the INA188. Applications with noisy or high-impedance power supplies may require decoupling capacitors close to the device pins. The output is referred to the output reference (REF) pin that is normally grounded. The reference pin must be a low-impedance connection to assure good common-mode rejection.
For this application, the design requirements are:
The following steps must be applied for proper device functionality: