VFC32KU/2K5

Overview

The VFC32KU/2K5 is a voltage-to-frequency and frequency-to-voltage converter manufactured by Texas Instruments in the SO-14 surface-mount package. It operates with a rated supply voltage of -15V within a range of -11V to -20V, drawing approximately 6mA quiescent current. The device supports full-scale frequencies up to 500kHz with a dynamic range of six decades. Linearity error is specified at -0.01% maximum for frequencies up to 10kHz and -0.05% maximum up to 100kHz. It accepts positive or negative voltage inputs and features an open-collector digital output compatible with standard logic families.

Feature Summary

• Provides accurate voltage-to-frequency and frequency-to-voltage conversion using charge balance principles.
• Features excellent linearity with low nonlinearity errors across wide operating frequency ranges.
• Offers versatile input options supporting both voltage and current signals.
• Delivers a digital open-collector frequency output compatible with common logic families.

Applications

• Integrating analog-to-digital converters
• Serial frequency output systems
• Isolated data transmission links
• FM analog signal modulation and demodulation
• Motor speed control circuits
• Tachometer applications

Procurement Notes

Verify the specific suffix /2K5 indicates the tape-and-reel packaging configuration containing 2500 units per reel. Confirm the SOIC-14 package type matches your board layout requirements. Ensure the -15V dual supply requirement aligns with your system design. Check the commercial temperature range specification of 0°C to +70°C against your environmental constraints. Validate RoHS compliance status through official documentation before procurement.

Selection Notes

Select this component when high linearity and wide dynamic range are required for precision signal processing. Consider the -15V supply requirement and ensure adequate power management infrastructure is available. Evaluate the need for external components such as integrating capacitors and input resistors to set gain and offset parameters. Compare performance metrics against other VFC series members if different temperature ranges or packages are needed.

Part Context

The VFC32KU/2K5 belongs to the VFC32 family of voltage-to-frequency converters originally developed by Burr-Brown Corporation and now produced by Texas Instruments. This family includes variants like the VFC32KP and VFC32BM, offering different package styles and temperature ranges. The KU variant specifically denotes the commercial grade version housed in a plastic SO-14 surface-mount package, suitable for automated assembly processes.

Replacement Considerations

Direct substitutes include other VFC32 family members such as VFC32KP for DIP packaging or VFC32BM for metal TO-100 packaging, provided pin compatibility and electrical specifications match the application requirements. Verify that any replacement part maintains the same -15V supply operation and output logic compatibility.