SBOS470A December 2019 – June 2021 INA293
The INA293 gain error is < 0.15% at room temperature, with a maximum drift of 10 ppm/°C over the full temperature range of –40°C to +125°C. The INA293 is available in multiple gain options of 20 V/V, 50 V/V, 100 V/V, 200 V/V, and 500 V/V, which the system designer should select based on their desired signal-to-noise ratio and other system requirements.
The INA293 closed-loop gain is set by a precision, low drift internal resistor network. The ratio of these resistors are excellently matched, while the absolute values may vary significantly. Adding additional resistance around the INA293 to change the effective gain is not recommended, however, because of this variation. The typical values of the gain resistors are described in Table 7-1.
|20 (V/V)||25 kΩ||500 kΩ|
|50 (V/V)||10 kΩ||500 kΩ|
|100 (V/V)||10 kΩ||1000 kΩ|
|200 (V/V)||5 kΩ||1000 kΩ|
|500 (V/V)||2 kΩ||1000 kΩ|