LTC6400IUD-20#PBF

Overview

The LTC6400IUD-20#PBF is a high-speed differential amplifier designed for processing signals from DC to 300MHz. It features a fixed gain of 20dB (10V/V) and a 1.8GHz –3dB bandwidth. The device operates on a single supply voltage ranging from 2.85V to 3.5V with a typical supply current of 90mA. It includes an adjustable output common mode voltage control pin allowing operation between 1V and 1.6V. The component 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 analog-to-digital converters.
• Features an internally fixed gain of 20dB, eliminating the need for external feedback resistors.
• Includes an independent output common mode voltage control pin that removes the requirement for input or output transformers in many applications.
• Offers both unfiltered and filtered differential outputs to support various impedance matching and filtering requirements.

Applications

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

Procurement Notes

Verify the specific suffix 'IUD' indicates industrial temperature range operation (-40°C to 85°C). Confirm the '#PBF' designation corresponds to lead-free packaging. Ensure the part number matches the exact gain version required for the design specifications.

Selection Notes

Select this variant when a fixed 20dB gain is required for broadband signal processing up to 300MHz. Consider the 200Ω differential input impedance for source matching. Evaluate power consumption against alternatives if lower current draw is critical for the system.

Part Context

This component belongs to the LTC6400 family of fully differential amplifiers. It serves as a specialized driver for high-speed data acquisition systems. The IUD-20 variant specifies the industrial temperature grade within the plastic QFN package format.

Replacement Considerations

LTC6401-20 offers similar functionality with lower power consumption but slightly higher non-linearity at high frequencies.

FAQ

How is the output common mode voltage controlled?

The output common mode voltage is set by applying a DC bias voltage to the VOCM pin, which can be adjusted between 1V and 1.6V.

What is the differential input impedance?

The differential input impedance is nominally 200Ω.