Abstract
This article introduces a groundbreaking precision switch product that aims to revolutionize the challenges faced in printed circuit board (PCB) design and electronic measurement systems that require high channel density and precision. With its innovative copackaging approach for passive components and the inclusion of a route through pins feature, this switch not only offers significant benefits in terms of PCB space utilization but also greatly enhances switch channel density. In addition, the very low switch resistance improves measure- ment accuracy and reduces power dissipation, which aids thermal management at a system level.
Introduction
The core innovation of this switch lies in its unique integration of passive com- ponents and independently controlled switches with a serial peripheral interface (SPI). By incorporating resistors and capacitors directly into the switch package, designers can achieve unprecedented space-saving benefits. This design architecture results in a remarkable reduction of up to 80% in board area, making it an ideal solution for applications where space limitations are a critical concern.
The route through pins feature offers a game-changing solution for PCB designers. By enabling efficient routing of SPI and power supply traces directly through the switch, this feature eliminates the need for additional vias or complex routing configurations. This simplification not only reduces design complexity but also leads to substantial improvements in switch channel density, enabling the creation of more compact and high-performance designs.
In addition to its space-saving attributes, this switch has a low switch resistance of approximately 0.5 Ω. This characteristic is crucial for improving measurement accuracy and minimizing heat generation when handling high currents. By reducing switch resistance, it provides superior signal integrity and precision in a wide range of applications, including automated test equipment and precision measurement and control systems. Furthermore, the low switch resistance improves thermal resistance, ensuring reliable and consistent performance even in varying environmental conditions.
Challenges When Maximizing Channel Count
When designing a system with the goal of maximizing channel count, board space becomes a valuable resource. Switches play a crucial role in increasing channel count in a system, but as the number of switches grows, board space is not only occupied by the switches themselves but also by the logic control lines and associated passive components required for correct operation. Consequently, the achievable channel count is compromised due to the space taken up by the additional components needed to control the switches.
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