LTC6400CUD-20#TRPBF

Overview

The LTC6400CUD-20#TRPBF is a high-speed differential amplifier designed for processing signals from DC to 300MHz. It features a fixed gain of 10V/V (20dB) and a 1.8GHz –3dB bandwidth. The device operates on a supply voltage ranging from 2.85V to 3.5V with a typical current consumption of 90mA. Key electrical characteristics include a total input noise of 2.1nV/√Hz, a noise figure of 6.2dB, and an equivalent output IP3 of 51dBm at 70MHz. It utilizes a 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 an externally adjustable output common mode voltage pin that eliminates the need for transformers or AC-coupling capacitors in many applications.
• Integrates a 590MHz internal low-pass filter at the filtered outputs to assist with signal conditioning.
• Supports both single-ended and differential input configurations with minimal external support circuitry.

Applications

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

Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging when sourcing this component. Confirm the 'C' grade designation corresponds to the commercial temperature range of 0°C to 70°C rather than the industrial range. Ensure compatibility with the required 16-lead QFN footprint during procurement planning.

Selection Notes

Select this part when a fixed 20dB gain is required for broadband signal processing up to 300MHz. Consider the 200Ω differential input impedance for source matching requirements. Evaluate the 90mA supply current against system power constraints compared to lower-power alternatives like the LTC6401 family.

Part Context

This component belongs to the LTC6400 series of fully differential amplifiers manufactured by Analog Devices Inc. It serves as a specialized interface between analog front-end stages and high-speed data converters. The device integrates feedback networks and common-mode control to simplify system design while maintaining high linearity.

Replacement Considerations

LTC6400IUD-20#TRPBF offers the same electrical specifications but supports an extended operating temperature range of –40°C to 85°C.