LT1721IGN#TRPBF

Overview

The LT1721IGN#TRPBF is a quad ultrafast comparator optimized for single-supply operation with a supply voltage range of 2.7V to 6V. It features rail-to-rail outputs compatible with TTL and CMOS logic levels. The device includes internal hysteresis to handle slow-moving input signals effectively. Propagation delay is specified at 4.5ns with 20mV overdrive and 7ns with 5mV overdrive. Quiescent current consumption is 4mA per comparator at 5V. The component operates within the industrial temperature range of -40°C to 85°C.

Feature Summary

• Ultrafast propagation delay performance for high-speed signal processing
• Rail-to-rail output capability ensuring direct interface with standard logic families
• Integrated internal hysteresis simplifies circuit design for noisy or slow signals
• Input common-mode range extends below the negative supply rail

Applications

• Crystal oscillator circuits
• Window comparators
• Threshold detectors and discriminators
• High-speed sampling circuits

Procurement Notes

Verify that the ordering suffix #TRPBF corresponds to the tape and reel packaging format required for automated assembly processes. Confirm the 'I' grade designation matches the necessary -40°C to 85°C industrial operating temperature range for your specific application environment. Ensure the 16-lead narrow plastic SSOP package dimensions are compatible with your printed circuit board layout constraints.

Selection Notes

Select this component when multiple independent comparison channels are required in a compact form factor. The quad configuration reduces board space compared to using dual packages. Consider the low dynamic current drain and optimized pinout for minimizing parasitic effects in high-frequency designs. Verify that the supply voltage requirements align with the 2.7V to 6V operational window.

Part Context

This part belongs to the LT1720/LT1721 family of ultrafast comparators from Analog Devices. While the LT1720 provides two channels, the LT1721 integrates four comparators into a single package. Both share identical electrical characteristics and optimization for single-supply applications. The family is designed for systems where small size and low power consumption are critical design parameters.

Replacement Considerations

LT1721CGN#TRPBF serves as a commercial grade alternative with a 0°C to 70°C operating range.