LT1993CUD-4#PBF

Overview

The LT1993CUD-4#PBF 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 built-in 175MHz differential lowpass filtering with additional filtered outputs to reduce external components. It provides adjustable output common mode voltage via the VOCM pin, eliminating the need for output transformers or AC-coupling capacitors in many designs. Packaged in a compact 16-lead 3x3mm QFN, it supports both single-ended and differential inputs/outputs.

Feature Summary

• Differential ADC Driver optimized for high-speed data acquisition systems
• Built-in 175MHz differential lowpass filter with dedicated filtered outputs
• Adjustable output common mode voltage control via VOCM pin
• Single-ended to differential conversion capability with minimal support circuitry

Applications

• Differential ADC Driver for imaging and communications systems
• IF Sampling Receivers and SAW Filter Interfacing/Buffering
• General-purpose differential gain block requiring DC to 900MHz operation

Procurement Notes

Verify the specific suffix #PBF indicates lead-free compliance when ordering. Confirm the 'C' grade designation corresponds to the guaranteed functional operating temperature range of –40°C to 85°C as specified in the datasheet. Ensure the UD package type matches the required PCB footprint for the 16-lead 3x3mm QFN configuration.

Selection Notes

Select this component for high-frequency signal conditioning where low noise and linearity are critical. It is suitable for driving 12-bit and 14-bit ADCs directly due to its low input-referred noise and high IP3. Consider the filtered outputs if anti-aliasing is required without adding external passive components. Ensure the system power budget accommodates the 100mA typical supply current at 5V.

Part Context

This part belongs to the LT1993-4 family of wideband differential amplifiers. The LT1993C-4 variant is specifically characterized for commercial temperature ranges, distinguishing it from the industrial grade LT1993I-4 which guarantees performance across the full –40°C to 85°C range. It serves as a bridge between analog front-ends and high-speed digital converters.

Replacement Considerations

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