LTC6403IUD-1#TRPBF

Overview

The LTC6403IUD-1#TRPBF is a precision, low noise, low distortion fully differential input/output amplifier optimized for single supply operation between 2.7V and 5.25V. It features a 200MHz gain-bandwidth product, 2.8nV/√Hz input-referred voltage noise density, and 60mA output current capability. The device includes unfiltered outputs (+OUT, –OUT) and integrated filtered outputs (+OUTF, –OUTF) with a 44.2MHz -3dB bandwidth. It operates over a temperature range of –40°C to 85°C in a 16-lead 3mm × 3mm QFN package.

Feature Summary

• Fully differential architecture with rail-to-rail output swing capability
• Integrated passive lowpass filter on dedicated output pins
• Hardware shutdown feature for significant power reduction
• Adjustable output common mode voltage via external reference

Applications

• Differential input analog-to-digital converter driver
• Single-ended to differential conversion and amplification
• Common mode level translation
• Low voltage, low noise signal processing

Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging when sourcing this component. Confirm the I-grade designation matches the required operating temperature range of –40°C to 85°C for your application environment. Ensure compatibility with the 16-lead QFN footprint during procurement planning.

Selection Notes

Select this component for applications requiring high linearity and low noise in a compact form factor. The integrated filter simplifies design by reducing external component count for bandlimited signals. Consider the 60mA drive strength for driving capacitive loads or low impedance ADC inputs directly without additional buffering stages.

Part Context

This part belongs to the LTC6403-1 family of fully differential amplifiers manufactured by Analog Devices. It is designed specifically to interface single-ended or differential sources with high-resolution ADCs. The IUD-1 variant specifies the industrial temperature grade and lead-free finish within the standard QFN package lineup.

Replacement Considerations

LTC6403CUD-1#TRPBF (Commercial Temperature Grade)

FAQ

What is the function of the +OUTF and –OUTF pins?

These pins provide filtered versions of the main outputs, featuring an internal single-pole lowpass filter with a –3dB bandwidth of 44.2MHz.

How does the SHDN pin control power consumption?

Pulling the SHDN pin at least 2.1V below V+ activates a low power shutdown state, reducing supply current significantly compared to normal operation.