LT1993CUD-4#TRPBF

Overview

The LT1993CUD-4#TRPBF is a low distortion, low noise differential amplifier and ADC driver designed for applications from DC to 900MHz. It features a fixed gain of 4V/V (12dB) and operates on a single 5V supply consuming 100mA. The device includes unfiltered outputs (+OUT, –OUT) and an integrated 175MHz differential lowpass filter with additional filtered outputs (+OUTFILTERED, –OUTFILTERED). It utilizes a compact 16-lead 3mm x 3mm QFN package and supports operation over a temperature range of –40°C to 85°C.

Feature Summary

• Provides differential drive capability with both standard and built-in filtered output pairs to reduce external filtering requirements.
• Features adjustable output common mode voltage via the VOCM pin, eliminating the need for output transformers or AC-coupling capacitors.
• Supports single-ended to differential conversion and differential to single-ended conversion with minimal support circuitry.
• Designed for high-speed analog-to-digital converter interfacing with exceptionally low input-referred noise and distortion.

Applications

• Differential ADC Driver for imaging and communications systems
• IF Sampling Receivers
• SAW Filter Interfacing and Buffering

Procurement Notes

Verify that the ordering suffix #TRPBF corresponds to the Lead Free Tape and Reel configuration as specified in the datasheet documentation. Confirm the 'C' grade designation indicates the commercial temperature range of –40°C to 85°C. Ensure the component matches the 16-lead 3mm x 3mm QFN physical package dimensions and pinout layout before integration.

Selection Notes

Select this component when driving high-speed 12-bit or 14-bit ADCs requiring low distortion and noise performance up to 900MHz. The fixed 4V/V gain simplifies design by removing external feedback resistors. Consider the integrated 175MHz lowpass filter if reducing external component count is a priority, or use the unfiltered outputs for maximum bandwidth applications.

Part Context

This part belongs to the LT1993-4 family of low noise differential amplifiers manufactured by Analog Devices Inc. (formerly Linear Technology). The 'C' suffix denotes the commercial temperature grade, while 'UD' identifies the specific 16-lead plastic QFN package type. The '#TRPBF' suffix specifies the lead-free tape and reel packaging format for automated assembly.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.