LTC6409IUDB#TRPBF

Overview

The LTC6409IUDB#TRPBF is a high-speed, low-distortion differential amplifier and ADC driver from Analog Devices. It features a 10GHz gain-bandwidth product and 1.1nV/√Hz input noise density. The device operates on a 2.7V to 5.25V supply, drawing 52mA of current. It includes a hardware shutdown feature reducing consumption to 100µA. Packaged in a compact 3mm × 2mm 10-lead QFN, it supports –40°C to 125°C operation.

Feature Summary

• Fully differential architecture with adjustable output common mode voltage
• Input common mode range includes ground for DC-coupled single-ended to differential conversion
• External resistors set gain with minimum stable differential gain of 1 V/V
• Hardware shutdown pin reduces power consumption significantly

Applications

• Differential pipeline ADC driver
• High speed data-acquisition cards
• Automated test equipment
• Time domain reflectometry
• Communications receivers

Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging when ordering. Confirm the 'I' grade designation matches the required operating temperature range of –40°C to 85°C. Ensure the 10-lead QFN package dimensions align with the PCB footprint design. Cross-reference the manufacturer part number directly with official Analog Devices documentation to avoid counterfeit components.

Selection Notes

Select this component for applications requiring high linearity and wide bandwidth. The external feedback network allows customization of gain and frequency response. Consider the 52mA supply current for power budgeting. The device is optimized for driving low-voltage, single-supply differential input ADCs directly.

Part Context

This part belongs to the LTC6409 family of high-speed differential amplifiers. It is designed to interface ground-referenced signals with differential ADCs. The series offers various temperature grades and packaging options to suit different environmental and manufacturing requirements.

Replacement Considerations

LTC6409CUDB#TRPBF

FAQ

How is the output common mode voltage determined?

The output common mode voltage is set by the voltage applied to the VOCM pin. If left floating, an internal divider sets a default voltage of 1.25V with a 5V supply.

What is the function of the SHDN pin?

The SHDN pin controls the power state. Driving it low disables the amplifier, reducing supply current to approximately 100µA. Leaving it open or high keeps the device active.