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LTC6405

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2.7GHz, 5V, Low Noise, Rail-to-Rail Input Differential Amplifier/Driver

Data Sheet Product Selection Table

Part Models: 8
1ku List Price: price unavailable

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Overview

Low Noise: 1.6nV/√Hz RTI
Low Power: 18mA at 5V
Low Distortion (HD2/HD3):
- –82dBc/–65dBc at 50MHz, 2V_P-P
- –97dBc/–91dBc at 25MHz, 2V_P-P
Rail-to-Rail Differential Input
4.5V to 5.25V Supply Voltage Range
Fully Differential Input and Output
Adjustable Output Common Mode Voltage
800MHz –3dB Bandwidth with A_V = 1
Gain-Bandwidth Product: 2.7GHz
Low Power Shutdown
Available in 8-Lead MSOP and 16-Lead 3mm × 3mm × 0.75mm QFN Packages

The LTC6405 is a very low noise, low distortion, fully differential input/output amplifier optimized for 5V, single supply operation. The LTC6405 input common mode range is rail-to-rail, while the output common mode voltage is independently adjustable by applying a voltage on the V_OCM pin. This makes the LTC6405 ideal for level shifting signals with a wide common mode range for driving 12-bit to 16-bit single supply, differential input ADCs.

A 2.7GHz gain-bandwidth product results in 65dB linearity for 50MHz input signals. The LTC6405 is unity gain stable and the closed-loop bandwidth extends from DC to 800MHz. The output voltage swing extends from near-ground to 4V, to be compatible with a wide range of ADC converter input requirements. The LTC6405 draws only 18mA, and has a hardware shutdown feature which reduces current consumption to 400μA.

The LTC6405 is available in a compact 3mm × 3mm 16‑pin leadless QFN package, as well as an 8-lead MSOP package, and operates over a –40°C to 85°C temperature range.

Applications

Differential Input ADC Driver
Single-Ended to Differential Conversion
Level-Shifting Ground-Referenced Signals
Level-Shifting V_CC-Referenced Signals
High-Linearity Direct Conversion Receivers

Part Models: 8
1ku List Price: price unavailable

Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LTC6405CMS8E#PBF	8-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC6405CMS8E#TRPBF	8-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC6405CUD#PBF	16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC6405CUD#TRPBF	16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC6405IMS8E#PBF	8-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC6405IMS8E#TRPBF	8-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC6405IUD#PBF	16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC6405IUD#TRPBF	16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Jun 5, 2024 - 24_0003 Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2)
		PCN24_0003_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LTC6405CMS8E#PBF
LTC6405CMS8E#TRPBF
LTC6405IMS8E#PBF
LTC6405IMS8E#TRPBF
Feb 3, 2020 - 20_0128 Laser Top Mark for 8 Lead MSOP Packages Assembled in ADPG and UTAC
		PCN20_0128_Form Material_Report
LTC6405CMS8E#PBF
LTC6405CMS8E#TRPBF
LTC6405IMS8E#PBF
LTC6405IMS8E#TRPBF
Mar 20, 2024 - 23_0089 Obsolescence of Tower Fab3 (JAZZ-3) SBC35 Process
		PDN23_0089_Form Material_Report
LTC6405CMS8E#PBF
LTC6405CMS8E#TRPBF
LTC6405CUD#PBF
LTC6405CUD#TRPBF
LTC6405IMS8E#PBF
LTC6405IMS8E#TRPBF
LTC6405IUD#PBF
LTC6405IUD#TRPBF

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Hardware Ecosystem

Parts	Product Life Cycle	Description
Matched Resistors & Transistors 1
LT5400	RECOMMENDED FOR NEW DESIGNS	Quad Matched Resistor Network

Parts	Product Life Cycle	Description
ADA4930-1	RECOMMENDED FOR NEW DESIGNS	Ultralow Noise Drivers for Low Voltage ADCs

Tools & Simulations

LTspice 1

LTC6405 Demo Circuit - Fully Differential ADC Driver with Simplified Mixer and ADC Models

Models for the following parts are available in LTspice:

LTC6405

ADI DiffAmpCalc™

ADI's new ADI DiffAmpCalc™ is a free, downloadable calculator for designing differential amplifier circuits. The tool is easy to use and features an interactive user interface to quickly get you up and running.

Open Tool

ADIsimRF

ADIsimRF is an easy-to-use RF signal chain calculator. Cascaded gain, noise, distortion and power consumption can be calculated, plotted and exported for signal chains with up to 50 stages. ADIsimRF also includes an extensive data base of device models for ADI’s RF and mixed signal components.

Open Tool

Sys-Parameter Models for Keysight Genesys

Sys-Parameter models contain behavioral parameters, such as P1dB, IP3, gain, noise figure and return loss, which describe nonlinear and linear characteristics of a device.

Open Tool

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.