LTC6401IUD-14#PBF

Overview

The LTC6401IUD-14#PBF is a high-speed differential amplifier designed for processing signals from DC to 140MHz. It features a fixed gain of 5V/V (14dB) and a –3dB bandwidth of 2GHz. The device operates on a supply voltage between 2.85V and 3.5V with a typical current consumption of 45mA. Key electrical specifications include an input impedance of 200Ω, an output common mode range of 1V to 1.6V, and an internal op amp noise density of 1.1nV/√Hz. It is housed in a compact 16-lead 3mm × 3mm QFN package.

Feature Summary

• Provides low noise and low distortion performance suitable for driving 12-, 14-, and 16-bit ADCs.
• Features internally fixed gain of 14dB with minimal external support circuitry requirements.
• Includes adjustable output common mode voltage control independent of inputs.
• Offers both unfiltered and filtered differential outputs for flexible signal conditioning.

Applications

• Differential ADC Driver
• IF Sampling Receivers
• Single Ended to Differential Conversion

Procurement Notes

Verify the specific suffix '#PBF' indicates lead-free finish and tube packaging. Confirm the 'I' grade designation matches the required operating temperature range of –40°C to 85°C. Ensure the datasheet revision aligns with the design requirements. Check for any discontinuance notifications as this part may have limited availability or end-of-life status.

Selection Notes

Select this component when a fixed 14dB gain is required for broadband applications up to 140MHz. It is appropriate for designs needing direct ADC interfacing without transformers. Consider the 200Ω input impedance for source matching. Compare against the LTC6400 family if lower distortion at higher frequencies is prioritized over power consumption.

Part Context

This device belongs to the LTC6401 series of high-speed differential amplifiers. It shares pin compatibility with other variants like the LTC6401-8 and LTC6401-26, which offer different gain settings. The 'I' suffix denotes industrial temperature range operation, while the 'UD' indicates the 16-lead QFN package type used across the family.

Replacement Considerations

LTC6401CUD-14#PBF offers identical electrical characteristics but is rated for commercial temperature range (0°C to 70°C). Verify that the reduced temperature specification meets the environmental requirements of the target application before substitution.