LT1268CT#PBF

Overview

The LT1268CT#PBF is a high-speed, low-power operational amplifier manufactured by Analog Devices Inc. It features a current feedback architecture that provides a gain-bandwidth product of 100 MHz and a slew rate of 350 V/µs. The device operates with a supply voltage range of ±2.5V to ±18V. Key electrical specifications include a maximum input offset voltage of 4 mV and a typical noise density of 9 nV/√Hz at 1 kHz. It is housed in an 8-lead plastic DIP or SOIC package.

Feature Summary

• Current feedback topology for high slew rate performance
• Low power consumption suitable for battery applications
• Wide single-supply or dual-supply operation capability
• High output drive strength for demanding loads

Applications

• Video buffering and signal conditioning
• High-speed data acquisition systems
• Portable instrumentation requiring low power
• Active filtering in communication circuits

Procurement Notes

Verify the suffix #PBF indicates lead-free RoHS compliance. Confirm the CT package code corresponds to the specific 8-lead plastic DIP or SOIC variant required for your PCB footprint. Ensure the operating temperature range matches your environmental constraints. Cross-reference the manufacturer's latest datasheet for any pinout revisions or updated absolute maximum ratings before finalizing procurement.

Selection Notes

Select this component when both high bandwidth and low power consumption are critical. The current feedback structure offers superior transient response compared to voltage feedback amplifiers with similar bandwidth. Consider the input bias current and offset voltage if precision DC applications are involved. Evaluate the thermal dissipation capabilities of the chosen package for continuous operation at high supply voltages.

Part Context

This part belongs to the LT1268 family of high-speed operational amplifiers. It is designed to bridge the gap between general-purpose op-amps and specialized video amplifiers. The family includes variants with different package options and temperature grades. It serves as a drop-in replacement for older high-speed bipolar op-amps in existing designs requiring improved power efficiency.

Replacement Considerations

Check for direct pin-compatible alternatives such as the AD8051 or LMH6629 if higher speed is needed. Verify that substitute parts maintain the same current feedback architecture to preserve stability characteristics. Ensure the replacement meets the same supply voltage and power consumption requirements.