Basic connection circuit of signal and power supply of INA128/129
Source: InternetPublisher:念念Brown Keywords: Series resistors integrated power signal and power ina128 Updated: 2021/11/07
The figure shows the basic connection circuit of the signal and power supply of 1NA128/129. The output voltage is based on the standard ground of the output Ref terminal. If there is an 8Ω series resistor, the common mode rejection ratio will drop by about 80dB (G=1). See the table below for the selection of gain and RG. Gain G=1 50kΩ/RG (INA128) or =1 49.4kΩ/RG (INA129). 50kΩ (or 49.4kΩ) is the sum of the feedback resistances of A1 and A2 inside INA128/129.
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