The advent of piezoelectric-based accelerometers revolutionized applications that previously couldn't accommodate classic mechanical units due to size or weight constraints. Among the notable pioneers in this realm is TE Connectivity's 11026945-00, a classic representative that continues to captivate the market with its exceptional performance.

The Analog Output Gem

In contrast to modern MEMS accelerometers with digital outputs, the 11026945-00 boasts a classic three-wire analog output, as depicted in the figure. To harness its power, design engineers must integrate a more complex reading circuit. A typical configuration employs an LF353 op-amp and a set of passive components for precise biasing and filtering. Tailoring component values allows optimization to meet the specific demands of each application.

11026945-00 boasts a classic three-wire analog output

Handling Voltage Adaptation: A Former Option

While TE Connectivity's IB-ACH-01 theoretically could handle voltage adaptation, it has long been discontinued and is no longer available from vendors. Engineers must, therefore, explore alternative methods to accommodate voltage needs in their designs.

LF353 opamp

Mounting Matters:

An intriguing aspect of the 11026945-00 lies in its mounting procedure, thoughtfully outlined in the datasheet. TE advises against using adhesives that do not cure completely, as these introduce damping and reduce accuracy. Elastic or flexible adhesives, such as sticky tape, are best avoided. Instead, TE recommends opting for cyanoacrylate adhesives, with the LocTite Black Max being a preferred choice.

Stock Situation and Discontinuation

While the 11026945-00 remains an excellent accelerometer capable of delivering accurate and high-speed information, the landscape of semiconductor development has led to its gradual obsolescence. As per OEMSecrets' current data, most TE Connectivity distributors have listed the 11026945-00 as discontinued, with no disposable stock available. Nonetheless, some firms still offer the part, albeit with lead times ranging from 7 to 22 weeks. For individual quantities, the accelerometer ranges between 65 and 85 EUR, with prices dropping to approximately 60 EUR for larger quantities.

Conclusion

The TE Connectivity 11026945-00 analog accelerometer continues to impress with its precision and performance. Yet, as semiconductor technology advances, it has become somewhat obsolete in new designs outside academic or vintage computing domains. While this classic gem excels in delivering high-quality data, engineers should carefully consider its use in today's landscape, where fully digital accelerometers offer a more affordable, easier-to-read solution, often boasting even finer resolution. Pay homage to the timeless legacy of the 11026945-00, celebrate its achievements, and explore its potential in projects that embrace its unique capabilities. For future endeavors, weigh the possibilities and embrace the modern digital alternatives to keep pace with the ever-evolving world of accelerometry.