LTC6409IUDB#TRMPBF

Overview

The LTC6409IUDB#TRMPBF is a high-speed, low distortion differential amplifier and ADC driver from Analog Devices Inc. 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 in active mode and 100µA in shutdown. It provides fully differential input and output with adjustable common mode voltage. The component is housed in a compact 3mm × 2mm 10-lead QFN package and supports an operating temperature range of –40°C to 85°C.

Feature Summary

• Provides fully differential amplification with adjustable output common mode voltage for direct ADC interfacing
• Features extremely low input noise density and high linearity for precision signal processing
• Includes hardware shutdown capability to significantly reduce power consumption when inactive

Applications

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

Procurement Notes

Verify the specific suffix TRMPBF indicates tape and reel packaging containing 500 pieces. Confirm the IUDB designation corresponds to the industrial temperature grade of –40°C to 85°C. Ensure the order matches the 10-lead QFN physical footprint requirements for your PCB layout.

Selection Notes

Select this component for applications requiring high bandwidth and low noise differential signaling. It is suitable for driving single-supply ADCs directly from ground-referenced inputs. Consider external feedback resistors to tailor gain and frequency response. Verify that the required supply voltage falls within the 2.7V to 5.25V operational range.

Part Context

This part belongs to the LTC6409 family of wideband differential amplifiers designed by Analog Devices. It serves as a bridge between single-ended or differential analog sources and high-resolution analog-to-digital converters. The series is characterized by its ability to handle high-frequency signals with minimal distortion and noise addition.

Replacement Considerations

LTC6409CUDB#TRMPBF

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 it to approximately 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 and reduces current draw to 100µA, while leaving it open or high keeps the device active.