What Is a Network Array?
A network array is a resistor network used in electronic circuits and sensors, comprising multiple resistor elements on a single substrate. This arrangement allows for high mounting density, efficient component placement, and cost reduction.
Typically, one end of each resistor in a network array connects to a signal line, and the other end to a common terminal, often serving as a pull-up resistor. This configuration is advantageous in various circuit designs.
Uses of Network Arrays
Network arrays find applications in diverse electronic settings, particularly for:
1. Resistor Dividers
Utilized in resistor dividers for analog-to-digital and digital-to-analog converters, network arrays play a critical role in signal processing.
2. Sensor Arrays
Used in temperature sensor arrays, they enable the detection of different temperature ranges, essential in precision sensing tasks.
3. Pull-up Resistors
Network arrays function as pull-up resistors in communication systems, especially between CPUs and memory, maintaining the integrity of data and address buses.
Principle of Network Arrays
Network arrays operate based on interconnected resistors:
1. General Resistor Network Array
Comprising resistors in series, these arrays create voltage drops for effective voltage division.
2. Sensor Array
As sensor arrays, they respond to physical changes such as temperature or pressure, providing vital resistance data for external analysis.
3. Pull-up Resistor
In I/O circuits, network arrays stabilize signal potentials in open-drain outputs, enhancing communication efficiency.
Structure of Resistor Array
The network array’s structure is integral to its function:
1. Substrate
A supporting insulating material, often ceramic, forms the foundation of the array.
2. Resistors
Thin-film resistors on the substrate are tailored for specific resistance values, crucial in precise circuit design.
3. Electrodes
Electrodes at each resistor’s ends facilitate electrical connections within the circuit’s wiring layout.
4. Packaging
Protected in chip resistor (SMD) or dual-inline (DIP) packages, network arrays are safeguarded for handling and use.