Typical Data Acquisition System Basic Grounding and Coupling Circuit (AD684/AD674)

As shown in the figure, the basic grounding and coupling circuit of a typical data acquisition system. As any high-speed, high-resolution data acquisition system, the power supply must be well regulated, and the additional high-frequency noise (ripple) must be suppressed. The AD684 power supply connection can well meet the above requirements, while being able to transmit instantaneous current to the device. In order to achieve the rated accuracy and dynamic performance, the power supply decoupling capacitor must be directly connected between the positive and negative legs of the power supply to the ground. Typically, a 0.1μF ceramic capacitor is used to connect VCC and VEE to the ground.