Product Description
The VT-UK2-3X/VT13922B/U141 universal card provided by Bosch Rexroth is embedded with dual operational amplifiers and zero-point potentiometers. These amplifiers and potentiometers are three and five in number respectively. The operational amplifier circuitry assembled using the card must have bypass capacitors to lower the coupled noise by using power sources with low impedance. These capacitors need to be connected between the ground and each supply pin. They must also be placed in close proximity to the operational amplifier. The op-amp circuits must have separate grounding with sufficient distance between them for digital and analog portions to help in noise suppression.
The card features one or more PCB layers with a ground plane that assists in lowering EMI noise pickup and distributing heat. It is important to take the ground current flow into consideration when separating the analog and digital grounding. The circuits of operational amplifiers are usually etched with thick and wide traces. The input traces and output or supply traces must be routed as far away as possible from each other to minimize parasitic coupling as much as possible. They must be etched perpendicular to each other instead of parallel if it is not possible to maintain a considerable distance. This card features backup support for one year.
The input traces are the most sensitive parts of the card and have to be very short. The operational amplifier is to be kept as close as possible to external components. The resistors in the circuit should be near the inverting input of these amplifiers to lower the parasitic capacitance. The critical traces of the operational amplifier circuit have to be surrounded by a guard ring with low impedance so that the leakage current from adjacent traces with dissimilar traces is reduced to a considerable extent. This card is sent to the desired destination through logistics partners like FedEx, DHL, USPS and UPS.
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