LM231N

Overview

The LM231N is a precision voltage-to-frequency converter manufactured by Texas Instruments. It operates from a single power supply ranging from 4V to 40V. The device features an open-collector output and supports frequency ranges from 1Hz to 100kHz with a maximum linear error of 0.02%. It utilizes an 8-pin PDIP package.

Feature Summary

• Precision conversion between voltage and frequency signals
• Single-supply operation capability
• Open-collector output configuration

Applications

• Frequency modulation circuits
• Analog-to-digital conversion systems
• Isolation amplifiers

Procurement Notes

Verify the manufacturer marking on the component body to confirm it originates from Texas Instruments or an authorized licensee. Ensure the part number suffix matches the specific variant requirements for your design, as packaging and compliance markings may vary across production batches.

Selection Notes

Select this component when high linearity and wide dynamic range are required for V-F conversion. Consider the 8-pin DIP package constraints for PCB layout. Evaluate the operating temperature range against environmental conditions to ensure reliable performance within specified limits.

Part Context

This device belongs to the LMx31x family of precision voltage-to-frequency converters. It serves as a bridge between analog signal processing and digital counting or timing applications, enabling accurate transmission of analog data over long distances using frequency-based signaling methods.

Replacement Considerations

The LM231N/NOPB is a verified equivalent replacement offering lead-free compliance while maintaining identical electrical specifications and pinout compatibility.