LTC6405CUD#PBF

Overview

The LTC6405CUD#PBF is a low noise, low distortion fully differential amplifier optimized for 5V single supply operation. It features a 2.7GHz gain-bandwidth product and an 800MHz -3dB bandwidth at unity gain. The device offers rail-to-rail input common mode range and adjustable output common mode voltage via the VOCM pin. It draws 18mA of supply current and includes a hardware shutdown feature reducing consumption to 400µA. The component operates within a 4.5V to 5.25V supply range and is housed in a compact 16-lead 3mm × 3mm QFN package.

Feature Summary

• Rail-to-rail differential input capability with independently adjustable output common mode voltage
• Low power consumption with hardware shutdown functionality
• High linearity performance suitable for driving high-resolution ADCs
• Fully differential input and output architecture

Applications

• Differential input ADC driver
• Single-ended to differential conversion
• Level-shifting ground-referenced signals
• High-linearity direct conversion receivers

Procurement Notes

Verify the specific temperature grade suffix 'C' corresponds to the 0°C to 70°C operating range required for your application environment. Confirm the 'UD' designation matches the 16-lead QFN package footprint. Ensure the '#PBF' suffix indicates lead-free compliance. Cross-reference the manufacturer part number against official Analog Devices documentation to validate authenticity before procurement.

Selection Notes

Select this component when a low noise, fully differential amplifier is needed for 5V single-supply systems. It is suitable for applications requiring rail-to-rail input common mode ranges and adjustable output common mode levels. Consider the 18mA supply current and available shutdown mode for power-sensitive designs. Verify that the 800MHz bandwidth meets the signal frequency requirements.

Part Context

The LTC6405 belongs to a family of wideband, low noise differential amplifiers designed by Analog Devices. This series is specifically engineered to drive analog-to-digital converters with high accuracy. The CUD variant specifies the commercial temperature grade and the QFN package style, distinguishing it from industrial grade or MSOP package options within the same functional family.

Replacement Considerations

LTC6405IUD#PBF (Industrial Temperature Grade)

FAQ

How is the output common mode voltage controlled?

The output common mode voltage is set by applying a voltage to the VOCM pin. If left open, an internal divider sets it to 2.5V with a 5V supply.

What is the input common mode range?

The LTC6405 features a rail-to-rail input common mode range, allowing it to handle signals from near ground to the positive supply.