RT1415B7TR7

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RT1415B7TR7 application field and working principle

The resistor networks, arrays, and RT1415B7TR7 Series are an integrated solution to complex resistor networks and arrays, reducing component count, PCB footprint and cost. These packages can be found in a wide range of applications such as current-sensing, high-side sensing, PI filters, signal termination and level translation. This particular series is specially designed for advanced and high-end applications in the automotive industry including braking control, airbag control, instrumentation, body control and radiation exposure monitoring.

The RT1415B7TR7 Series, a Thru-Hole Termination Surface Mount Technology (TTSMT) design, reduces the number of parts used in design, testing and assembly. The resistors are etched from an alumina sheet, and connected with nickel-alloy bonds to ensure stable and long-term performance. It is available in 4-, 6-, and 8- resistor array configuration. It offers a wide resistance range from 5 Ω to 8 kΩ typically, with 0.1 % tolerance, and rated power up to 0.4 W. The resistors are also RoHS and AEC-Q200 compliant making this series highly reliable and suitable for automotive applications.

Working Principle

The RT1415B7TR7 resistors incorporate the popular high-accuracy thin-film technology. The thin film deposition process is a multilayered procedure. It is a process of depositing metal layers on top of each other while an organometallic compound, composed of metal and organic material, is broken down into form a thin sheet of material called the resistive layer. Each metal layer is applied carefully and accurately contributing to current conduction and insulating properties of the resistor. The series conforms to the highest quality standards from the National Resistor Association. It incorporates an end contact construction and multi-element array inter-connections to increase reliability.

The current carrying capability of the resistor depends on temperature and power rating. As temperature increases, the derating factor comes into play thus limiting the current carrying capabilities of the resistor. To maximise the current carrying capability of the resistor, it is recommended to use additional cooling measures such as fans or air ducts. Additionally, it is important to make sure there is sufficient spacing between the resistors to ensure proper ventilation.

Applications

The resilient design and characteristics of the RT1415B7TR7 makes it ideal for a broad range of automotive related applications including braking control, airbag control, instrumentation, body control and radiation exposure monitoring. Current sensing is one of the primary applications for this series, and it is widely used for protections and interfaces in many systems even in avionics and aerospace applications.

The RT1415B7TR7 Series is also frequently used in high-side sensing applications. Its high-accuracy makes it suitable for precision voltage monitoring applications like current sensors as well as in power supplies, as an emergency shutdown device and for diagnostics. It can also be used in signal termination for analog and digital circuit and in level translation to reduce logic levels from high to lower voltage systems. Due to its low part count, small outline, and ease of assembly, the RT1415B7TR7 is also suitable for applications such as PI filters, voltage dividers, and RC networks.

Conclusion

In conclusion, the RT1415B7TR7 Series is a reliable and economical solution for resistor networks, arrays and other automotive applications. Its high accuracy coupled with the low part count and small size makes this series suitable for high-end and advanced applications. Additionally, it offers a wide range of resistance from 5 Ω to 8 kΩ with 0.1 % tolerance and power ratings up to 0.4 W. The RT1415B7TR7 Series operates in temperatures from -55 °C to 125 °C and is RoHS and AEC-Q200 compliant.

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