High-precision measurement amplifier circuit composed of the INA131

Published:2011/6/27 1:51:00 Author:Rebekka | Keyword: High-precision measurement amplifier | From:SeekIC

The INA131 is a low-cost general-purpose amplifier. Its inside gain resistor passes laser trimmed and makes the gain error small. It provides a standard gain of 100. The figure shows the high-precision measuring amplifier and the input signal of the electrical diagram bridge sensor (load cell, such as strain, displacement measurement sensors, etc.). This connection of the 50Hz power interference and high common mode interference rejection is very high. The magnification is 100, if you need a higher gain, you can add a gain resistor RG in ①, ⑧ foot indirectly. The gain size: G = 100 +250 kΩ / RG.



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