LTC6401IUD-8#PBF

Overview

The LTC6401IUD-8#PBF is a high-speed differential amplifier designed for processing signals from DC to 140MHz. It features a fixed gain of 2.5V/V (8dB) and a 2.2GHz –3dB bandwidth. The device operates on a single supply voltage ranging from 2.85V to 3.5V with a typical current consumption of 45mA. Key electrical specifications include an input impedance of 400Ω, an output common mode voltage adjustable between 1V and 1.6V via the VOCM pin, and a slew rate of 3400V/μs. It is housed in a compact 16-lead 3mm × 3mm QFN package.

Feature Summary

• Provides low noise and low distortion performance specifically optimized for driving 12-, 14-, and 16-bit ADCs.
• Features fully differential inputs and outputs with an internally fixed gain of 8dB.
• Includes an external VOCM pin for independent adjustment of the output common mode voltage.
• Supports both DC-coupled and AC-coupled operation without requiring transformers.

Applications

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

Procurement Notes

Verify that the ordering suffix #PBF corresponds to the lead-free finish and tube packaging variant. Confirm the 'I' grade designation matches the required industrial temperature range of –40°C to 85°C. Ensure the specific part number aligns with the datasheet documentation for the LTC6401-8 series to guarantee functional compatibility.

Selection Notes

Select this component when a fixed 8dB gain is sufficient for the application signal chain. Consider the 400Ω differential input impedance for source matching requirements. Evaluate the 1nV/√Hz internal op amp noise density against system noise floor constraints. Verify that the 2.85V to 3.5V supply range fits the available power rails.

Part Context

This component belongs to the LTC6401 family of high-speed differential amplifiers manufactured by Analog Devices Inc. The 'I' suffix indicates the industrial temperature grade, while 'UD' specifies the 16-lead QFN package type. The '#PBF' suffix denotes the lead-free finish and tube shipping configuration.

Replacement Considerations

The LTC6401CUD-8#PBF serves as a commercial temperature grade alternative within the same package and specification set.