LTC6401IUD-26#PBF

Overview

The LTC6401IUD-26#PBF is a high-speed differential amplifier designed for processing signals from DC to 140MHz. It features a fixed gain of 26dB (20V/V) and a 1.6GHz -3dB bandwidth. The device operates on a single supply voltage ranging from 2.85V to 3.5V with a typical supply current of 45mA. It provides differential inputs and outputs, offering a 50Ω input impedance and adjustable output common mode voltage between 1V and 1.6V via the VOCM pin. Packaged in a compact 16-lead 3mm × 3mm QFN, it supports both DC and AC coupling.

Feature Summary

• Fixed internal gain of 26dB with low noise and low distortion characteristics optimized for driving high-resolution ADCs.
• Differential input and output architecture with integrated output common mode control circuitry.
• Integrated low-pass filter outputs providing additional signal filtering capabilities.
• Single-ended to differential conversion capability without requiring external baluns.

Applications

• Differential ADC Driver
• IF Sampling Receivers
• SAW Filter Interfacing

Procurement Notes

Verify the specific suffix #PBF indicates lead-free finish and tube packaging when ordering. Confirm the I-grade designation matches the required operating temperature range of –40°C to 85°C. Ensure the 16-lead QFN package dimensions align with the PCB footprint specifications provided in the datasheet. Cross-reference the manufacturer part number with authorized distributors to ensure authenticity and traceability.

Selection Notes

Select this component when a fixed 26dB gain is required for broadband applications up to 140MHz. Consider the 45mA supply current and thermal dissipation within the small QFN package. Evaluate the need for differential signaling versus single-ended input configurations. Compare against the LTC6400 series if lower distortion is prioritized over power consumption.

Part Context

This part belongs to the LTC6401 family of high-speed differential amplifiers. It shares the same physical package and basic functionality as other gain variants like the LTC6401-8 and LTC6401-20. The 'I' suffix denotes industrial temperature performance, while the 'UD' specifies the 16-lead QFN package type. It serves as a direct interface solution between RF front-ends and data converters.

Replacement Considerations

LTC6401CUD-26#PBF