752083103G

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Resistor networks are electrical networks consisting of connected resistors in a certain configuration. Resistor networks are used in a variety of circumstances, from measuring voltage and current, as components of voltage regulators and filters, and as a way to control electrical properties such as frequency or damping. The 752083103G is a four-resistor network commonly used in digital circuits to provide precision current sources and voltage references for embedded systems.

Overview

The 752083103G, also known as a PTAT or process temperature independent auto-trimming resistor network, is based on four resistors of different sizes. This allows the network to provide different combinations of resistances. The four resistors are identified as R1, R2, R3, and R4, with R4 being the larger of the four. The resistors are arranged in pairs, one pair in parallel and the other in series. This arrangement produces a stabilized temperature coefficient, allowing for temperature independent operation. In addition, a trimming resistor is connected to the ends of the network, allowing the voltage reference or current source values to be adjusted.

Application Field

The 752083103G is typically used as a reference voltage or current source in many industries, including medical, automotive, communications, consumer, and industrial. Its primary application is in digital chips for the automotive, communications, and consumer markets to provide precision current and voltage references. The resistor network is also used in several medical applications such as drug delivery pumps, transfusion monitors, and organ replacement systems.

Working Principle

The 752083103G uses a temperature dependent resistor (TDR) to generate its reference voltage or current. The TDR is an active resistor whose resistance changes with temperature. The TDR is connected in series between two reference voltages, one of which is adjustable. The other reference voltage is usually fixed. When the TDR’s voltage is below the adjustable reference voltage, the TDR’s resistance increases, causing the voltage to decrease. Conversely, when the voltage is above the adjustable reference, the TDR’s resistance decreases causing the voltage to increase. This process creates a negative feedback loop that keeps the voltage or current at the desired set point.

The 752083103G uses the four resistors to create an adjustable voltage or current reference. The resistor values are chosen to compensate for any changes in temperature. By varying the value of the trim resistor, the voltage or current reference can be adjusted for each application.

Conclusion

The 752083103G is a four-resistor network used to provide precise current sources and voltage references for many different types of applications. This network combines four resistors of different sizes in pairs, one pair in parallel and the other in series, to provide a stabilized temperature coefficient. In addition, a trim resistor can be connected to adjust the reference voltage or current as needed. The 752083103G is widely used in medical, automotive, communications, consumer, and industrial applications to provide precise references.

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