LTC6409HUDB#TRPBF

Overview

The LTC6409HUDB#TRPBF is a high-speed, low-distortion fully differential amplifier and ADC driver manufactured by Analog Devices Inc. It features a 10 GHz gain-bandwidth product and an input noise density of 1.1 nV/√Hz. The device operates on a supply voltage range of 2.7 V to 5.25 V with a typical supply current of 52 mA. It includes a hardware shutdown feature that reduces consumption to 100 µA. The component is housed in a compact 3 mm × 2 mm 10-lead QFN package and supports operation from –40°C to 125°C.

Feature Summary

• Provides fully differential output with adjustable common mode voltage for direct interfacing with analog-to-digital converters.
• Input common mode range includes ground, enabling DC-coupled conversion of single-ended signals to differential outputs.
• Features external gain setting via resistors and a low-power hardware shutdown capability.

Applications

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

Procurement Notes

Verify the specific temperature grade suffix (H) corresponds to the required industrial operating range of –40°C to 125°C. Confirm the TRPBF suffix indicates tape and reel packaging. Ensure the ordering information matches the exact pinout and lead finish specifications provided in the official datasheet before finalizing procurement.

Selection Notes

Select this component when driving differential ADCs requires a wide bandwidth and low noise performance. The device is suitable for applications needing ground-referenced single-ended inputs converted to differential signals. Consider the external resistor requirements for gain setting and the need for proper feedback network matching to maintain optimal common-mode rejection.

Part Context

The LTC6409 belongs to Analog Devices' family of high-speed differential amplifiers designed specifically for signal chain conditioning. This model represents the high-temperature grade variant within the series, offering robust performance for demanding industrial and communications environments where wide dynamic range and linearity are critical.

Replacement Considerations

LTC6409IUDB#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 it to approximately 1.25 V with a 5 V supply.

What is the function of the SHDN pin?

The SHDN pin controls the power state. Driving it low disables the part and reduces supply current to approximately 100 µA, while leaving it open or driving it high maintains normal active operation.