ADVFC32KNZ

Overview

The ADVFC32KNZ is a monolithic voltage-to-frequency and frequency-to-voltage converter manufactured by Analog Devices Inc. It operates with a maximum full-scale frequency of 500 kHz and offers high linearity, specified at ±0.01% max error at 10 kHz and ±0.05% max error at 100 kHz. The device supports a six-decade dynamic range and accepts both voltage and current inputs. It features an open-collector output compatible with TTL or CMOS logic levels, allowing pull-up voltages up to 30 V. The component is housed in a 14-lead plastic DIP package.

Feature Summary

• Utilizes charge balancing circuit technique for high accuracy voltage-to-frequency conversion
• Provides TTL and CMOS compatible open collector frequency output
• Supports unipolar, bipolar, and current input configurations
• Designed as a pin-for-pin replacement for other manufacturer VFC32 devices

Applications

• Microprocessor operated A/D converter front ends
• High noise immunity analog data links
• Remote signal sensing through noisy environments
• High resolution measurement and control systems

Procurement Notes

Verify the specific temperature grade and package configuration required for the application. The KN suffix denotes the commercial grade plastic DIP variant. Confirm availability status as distribution channels may list discontinued or limited stock items. Ensure proper ESD precautions are observed during handling due to device sensitivity. Cross-reference ordering guides for MIL-STD-883 compliant versions if military specifications are mandatory.

Selection Notes

Select components with low temperature coefficients for RIN and C1 to maintain overall temperature stability. The integration capacitor value does not critically affect linearity or drift. Consider the input impedance requirements; negative voltage inputs require high impedance sources. Evaluate the need for offset trimming circuits if precise zero calibration is necessary across temperature ranges. Ensure power supply decoupling is implemented close to the device pins.

Part Context

The ADVFC32 series includes variants such as the ADVFC32BH and ADVFC32SH, which offer wider operating temperature ranges in hermetically sealed TO-100 packages. The ADVFC32KNZ represents the commercial grade option in a standard plastic DIP format. All variants share the same core functionality and pinout, differing primarily in environmental ratings and construction materials.

Replacement Considerations

The datasheet identifies the ADVFC32 as a pin-for-pin replacement for VFC32 devices from other manufacturers. Verify electrical compatibility with legacy designs before substitution.