VFC320CPG4

Overview

The VFC320CPG4 is a monolithic voltage-to-frequency converter manufactured by Texas Instruments. It integrates a precision internal reference, an analog-to-digital converter, and a frequency output stage on a single chip. The device operates with a supply voltage range of 4V to 40V and supports full-scale frequencies up to 1 MHz. It features integral nonlinearity (INL) specifications of ±0.1% FSR and operates within a temperature range of -40°C to +85°C. The component is housed in a 14-pin PDIP package.

Feature Summary

• Integrates a precision internal reference and analog-to-digital conversion circuitry for high accuracy.
• Provides direct digital frequency output compatible with microprocessors and counters.
• Supports wide supply voltage operation suitable for industrial environments.

Applications

• Industrial process control systems requiring precise signal digitization.
• Data acquisition systems utilizing counter-based measurement architectures.
• Isolated communication links where galvanic isolation is achieved via optical coupling.

Procurement Notes

Verify the specific suffix 'PG4' indicates lead-free packaging and RoHS compliance when sourcing. Confirm the package type corresponds to the 14-pin plastic dual in-line configuration. Ensure the operating environment remains within the specified temperature limits for guaranteed performance metrics.

Selection Notes

Select this component when a direct voltage-to-frequency conversion is required without external timing capacitors or resistors. It is suitable for applications demanding low integral nonlinearity and wide dynamic range. Consider the 1 MHz maximum frequency limit against system bandwidth requirements.

Part Context

This device belongs to the VFC family of voltage-to-frequency converters designed for high-precision analog signal processing. It simplifies system design by eliminating the need for discrete components typically required in traditional VFC implementations. The integrated nature reduces board space and improves long-term stability compared to multi-chip solutions.

Replacement Considerations

The LM331 is a functional equivalent offering similar voltage-to-frequency conversion capabilities. Verify pin compatibility and thermal characteristics before substitution. Check datasheet specifications for INL and linearity differences to ensure application suitability.