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NCS2325DMR2G Datasheet(PDF) 10 Page - ON Semiconductor |
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NCS2325DMR2G Datasheet(HTML) 10 Page - ON Semiconductor |
10 / 15 page NCS325, NCS2325, NCS4325 www.onsemi.com 10 Differential Amplifier for Bridged Circuits Sensors to measure strain, pressure, and temperature are often configured in a Wheatstone bridge circuit as shown in Figure 24. In the measurement, the voltage change that is produced is relatively small and needs to be amplified before going into an ADC. Precision amplifiers are recommended in these types of applications due to their high gain, low noise, and low offset voltage. Figure 24. Bridge Circuit Amplification + − VDD VDD GENERAL LAYOUT GUIDELINES To ensure optimum device performance, it is important to follow good PCB design practices. Place 0.1 mF decoupling capacitors as close as possible to the supply pins. Keep traces short, utilize a ground plane, choose surface−mount components, and place components as close as possible to the device pins. These techniques will reduce susceptibility to electromagnetic interference (EMI). Thermoelectric effects can create an additional temperature dependent offset voltage at the input pins. To reduce these effects, use metals with low thermoelectric−coefficients and prevent temperature gradients from heat sources or cooling fans. |
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