LM231AN

Overview

The LM231AN is a voltage-to-frequency converter IC manufactured by National Semiconductor. It operates with a maximum frequency of 100 kHz and features a linearity of ±0.01%. The device exhibits a full-scale temperature coefficient of ±50ppm/°C. It is housed in an 8-PDIP package with a width of 0.300 inches (7.62mm) and supports through-hole mounting. The component is currently active, though it does not comply with RoHS standards.

Feature Summary

• Converts analog input voltage signals into proportional digital frequency outputs for precise measurement applications.

Applications

• Precision data acquisition systems requiring high-resolution signal conversion.

Procurement Notes

Verify compliance requirements as the LM231AN does not meet RoHS standards. Confirm that the 8-PDIP through-hole package aligns with the target PCB design. Ensure the manufacturer source is recognized, noting the transition from National Semiconductor to Texas Instruments for legacy support. Check specific batch documentation for material composition details.

Selection Notes

Select this component when high linearity and low temperature drift are critical for frequency output accuracy. The 100 kHz maximum frequency limit defines the bandwidth constraints for input signal processing. Consider the PDIP package size for manual assembly or prototyping environments where surface mount options are not feasible.

Part Context

This part belongs to the LM231 family of voltage-to-frequency converters. It serves as a bridge between analog sensor outputs and digital counting or timing circuits. The device integrates necessary internal circuitry to perform linear conversion without external components for basic operation.

Replacement Considerations

Check for LM231 variants with different suffixes for updated packaging or compliance status. Verify pin compatibility if substituting with other V/F converters from the same manufacturer lineage.