LTC6400IUD-26#PBF

Overview

The LTC6400IUD-26#PBF is a high-speed differential amplifier designed for processing DC to 300MHz signals. It features a fixed gain of 26dB (20V/V) and a 1.9GHz -3dB bandwidth. The device operates on a single supply voltage ranging from 2.85V to 3.5V, drawing 85mA of current. It provides differential inputs with 50Ω impedance and adjustable output common mode voltage between 1V and 1.6V. Packaged in a 16-lead 3mm x 3mm QFN, it supports industrial temperature ranges from -40°C to 85°C.

Feature Summary

• Provides low noise and low distortion performance suitable for driving 12-, 14-, and 16-bit ADCs.
• Features an externally adjustable output common mode voltage independent of the input signal.
• Includes internal feedback networks establishing a fixed gain and 50Ω differential input impedance.
• Offers filtered outputs with integrated low-pass filtering capabilities.

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 when sourcing. Confirm the 'I' grade designation matches the required -40°C to 85°C operating temperature range for your application environment. Ensure the 16-lead QFN footprint aligns with your PCB layout constraints.

Selection Notes

Select this component for applications requiring a fixed 26dB gain and direct interfacing with high-speed ADCs without external transformers. Consider the 85mA supply current and 3.5V maximum voltage limits during power budgeting. Evaluate the 1.9GHz bandwidth against your highest frequency signal requirements.

Part Context

This part belongs to the LTC6400 family of high-speed differential amplifiers. It shares pin compatibility with the lower-power LTC6401 series but offers higher output drive capability at the cost of increased power consumption. The device serves as a general-purpose broadband gain block or specialized ADC driver within Analog Devices' signal chain portfolio.

Replacement Considerations

LTC6400CUD-26#PBF: Identical electrical specifications but rated for commercial temperature range (0°C to 70°C).

FAQ

How is the output common mode voltage controlled?

The output common mode voltage is set by an external pin (VOCM), allowing adjustment between 1V and 1.6V independently of the input signal.

What is the differential input impedance?

The differential input impedance is internally fixed at 50Ω, facilitating direct matching with standard 50Ω sources.