LM331N/NOPB

Overview

The LM331N/NOPB is a precision voltage-to-frequency converter manufactured by Texas Instruments. It operates on a single power supply ranging from 5 V to 28 V and features an output frequency capability of up to 100 kHz. The device utilizes a through-hole MDIP-8 package for mounting. It exhibits a linearity error of ±0.14% FSR, ensuring accurate signal conversion. The component is designed for applications requiring reliable analog-to-digital conversion via frequency modulation.

Feature Summary

• Precision voltage-to-frequency conversion with low linearity error
• Single-supply operation compatible with standard logic levels
• High-speed output frequency generation up to 100 kHz

Applications

• Analog-to-digital conversion systems
• Frequency modulation circuits
• Isolated data transmission interfaces

Procurement Notes

Verify the specific suffix 'NOPB' indicates lead-free compliance and RoHS adherence as per Texas Instruments standards. Confirm the package type is MDIP-8 and the operating temperature range aligns with your environmental requirements. Ensure the input voltage range matches your system's single-supply constraints between 5 V and 28 V before finalizing procurement.

Selection Notes

Select this component when high linearity and wide dynamic range are required for voltage-to-frequency conversion. It is suitable for designs needing isolation or noise immunity through frequency-based signaling. Consider the through-hole package if PCB space allows and mechanical robustness is prioritized over surface-mount density.

Part Context

The LM331 series is a well-established family of voltage-to-frequency converters known for their accuracy and versatility. The LM331N/NOPB variant specifically offers lead-free packaging and environmental compliance. It serves as a bridge between analog sensor signals and digital processing systems, providing a robust solution for industrial and instrumentation applications.

Replacement Considerations

Direct pin-compatible replacements may include other LM331 variants such as LM331AN or LM331Q, depending on temperature grade and package preference. Verify electrical specifications and package dimensions before substitution to ensure circuit compatibility.