KA311

Overview

The KA311 is a monolithic, low input current voltage comparator designed for operation from dual or single supply voltages. It features offset voltage null capability and strobe functionality. The device supports a differential input voltage of ±30V and operates with a total supply voltage up to 36V. Key electrical characteristics include a maximum input bias current of 250nA and a typical response time of 200ns. It provides an open-collector output capable of switching voltages up to +40V relative to the negative supply.

Feature Summary

• Low input bias and offset currents for high-impedance signal compatibility
• Offset voltage null capability for precision applications
• Strobe capability for controlled output activation
• Wide power supply range supporting both single and dual configurations

Applications

• Precision window detectors
• Time delay circuits
• Peak detectors
• Sample-and-hold circuits

Procurement Notes

Verify the specific package variant required, as the KA311 series includes both 8-DIP and 8-SOP options. Confirm that the selected component meets the operating temperature range of 0°C to 70°C. Ensure the application design accounts for the absolute maximum ratings, particularly regarding output short circuit duration and power dissipation limits to maintain device safety.

Selection Notes

Select the KA311 when low input current requirements are critical for maintaining signal integrity in high-impedance circuits. Consider the offset null feature if precise threshold detection is necessary without external trimming components. Evaluate the need for strobe functionality to manage output states during inactive periods. Ensure the supply voltage configuration aligns with the system's available power rails.

Part Context

The KA311 belongs to a family of single comparators originally developed by Fairchild Semiconductor. It serves as a functional equivalent to other industry-standard comparators like the LM311. The device is categorized under analog mixed-signal integrated circuits, specifically within the amplifier and comparator subcategory. It is manufactured using bipolar technology.

Replacement Considerations

The LM311 is documented as a similar single comparator part number.