KM4120IT6TR3

Overview

The KM4120IT6TR3 is a dual, low-cost, voltage feedback operational amplifier manufactured by Fairchild Semiconductor. It is designed for operation with single or dual power supplies, supporting voltages such as +2.7V, +5V, and ±2.5V. The device features a rail-to-rail output capability and an input voltage range that extends below the negative supply rail. Key electrical characteristics include a bandwidth of 7.3MHz and a slew rate of 9V/µs. It operates with a typical supply current of 70µA per amplifier channel. The component is housed in a small SOT-23-5 surface-mount package, making it suitable for space-constrained portable applications.

Feature Summary

• Dual-channel architecture providing two independent amplifiers in a compact footprint
• Rail-to-rail output swing capability maximizing dynamic range at low supply voltages
• Ultra-low quiescent current consumption optimized for battery-powered systems
• Wide single-supply operating range compatible with standard logic levels

Applications

• Portable and battery-powered electronic devices requiring low power consumption
• Analog-to-digital converter (ADC) buffer stages for signal interfacing
• Active filter circuits in signal conditioning chains
• Portable test instruments and measurement equipment

Procurement Notes

Verify the specific suffix IT6TR3 to confirm the tape-and-reel packaging configuration and temperature grade. Ensure compatibility with the required supply voltage range and load conditions. Cross-reference the manufacturer datasheet for absolute maximum ratings to prevent device damage during integration.

Selection Notes

Select this component when a dual op-amp solution is required with minimal power draw and rail-to-rail output performance. Compare against similar low-power CMOS amplifiers if higher bandwidth or different package options are needed. Verify that the input common-mode voltage range meets the specific application requirements relative to the negative rail.

Part Context

This part belongs to the KM411x series of ultra-low power operational amplifiers from Fairchild Semiconductor. It shares architectural similarities with the KM4112 but provides dual channels instead of a single unit. The series is characterized by its cost-effectiveness and suitability for general-purpose analog signal processing in portable electronics.

Replacement Considerations

Compatible alternatives within the same family include the KM4112 for single-channel applications. Other dual-channel low-power op-amps may serve as substitutes if pinout and electrical specifications align. Verify functional equivalence before replacing to ensure circuit stability.