LTC6409CUDB#TRPBF

Overview

The LTC6409CUDB#TRPBF is a high-speed, low distortion differential amplifier and ADC driver manufactured by Analog Devices Inc. It features a 10GHz gain-bandwidth product and an input noise density of 1.1nV/√Hz. The device operates on a supply voltage range of 2.7V to 5.25V with a typical supply current of 52mA. It includes a hardware shutdown feature that reduces consumption to 100µA. The component is housed in a compact 3mm × 2mm 10-lead QFN package and supports operation from –40°C to 85°C.

Feature Summary

• Features a 10GHz gain-bandwidth product for ultra-wideband signal processing.
• Provides fully differential input and output with adjustable output common mode voltage.
• Includes a hardware shutdown pin to significantly reduce power consumption.
• Input common mode range extends to ground, enabling DC-coupled single-ended to differential conversion.

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 (C, I, or H) required for your operating environment, as the CUDB variant specifies a commercial range of 0°C to 70°C. Confirm the TRPBF suffix indicates tape and reel packaging. Ensure the order matches the exact lead-free finish and plastic QFN package dimensions specified in the manufacturer's ordering information section.

Selection Notes

Select this component when driving differential ADCs requires a wide bandwidth exceeding several gigahertz. The external resistor configuration allows precise tailoring of gain and frequency response. Consider the 1.1nV/√Hz noise density for low-noise applications. Verify that the 52mA supply current fits within the system's thermal budget and power constraints.

Part Context

This part belongs to the LTC6409 family of high-speed differential amplifiers designed specifically for driving analog-to-digital converters. It serves as a bridge between ground-referenced single-ended sources and differential ADC inputs. The family offers various temperature grades and packaging options to suit different industrial and commercial deployment requirements.

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 1.25V at 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 to approximately 100µA, while leaving it open or high keeps it active.