LTC6405 - 2.7GHz, 5V, Low Noise, Rail-to-Rail Input Differential Amplifier/Driver


  • Low Noise: 1.6nV/√Hz RTI
  • Low Power: 18mA at 5V
  • Low Distortion (HD2/HD3):
    –82dBc/–65dBc at 50MHz, 2VP-P
    –97dBc/–91dBc at 25MHz, 2VP-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 AV = 1
  • Gain-Bandwidth Product: 2.7GHz
  • Low Power Shutdown
  • Available in 8-Lead MSOP and 16-Lead 3mm × 3mm × 0.75mm QFN Packages

Typical Application

LTC6405 Typical Application
LTC6405 Typical Application


The LTC®6405 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 VOCM 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.


CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
LTC6405CMS8E#PBF MS-8E MS8E C 05-08-1662 Yes
LTC6405CMS8E#TRPBF MS-8E MS8E C 05-08-1662 Yes
LTC6405CUD#PBF 3x3 QFN-16 UD C 05-08-1691 Yes
LTC6405CUD#TRPBF 3x3 QFN-16 UD C 05-08-1691 Yes
LTC6405IMS8E#PBF MS-8E MS8E I 05-08-1662 Yes
LTC6405IMS8E#TRPBF MS-8E MS8E I 05-08-1662 Yes
LTC6405IUD#PBF 3x3 QFN-16 UD I 05-08-1691 Yes
LTC6405IUD#TRPBF 3x3 QFN-16 UD I 05-08-1691 Yes

LTC6405 Package Drawing
LTC6405 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
LTC6405CMS8E#PBF MS-8E C $4.98 $3.44 Yes
LTC6405CMS8E#TRPBF MS-8E C $3.50 Yes
LTC6405CUD#PBF 3x3 QFN-16 C $4.98 $3.44 Yes
LTC6405CUD#TRPBF 3x3 QFN-16 C $3.50 Yes
LTC6405IMS8E#PBF MS-8E I $5.48 $3.79 Yes
LTC6405IMS8E#TRPBF MS-8E I $3.85 Yes
LTC6405IUD#PBF 3x3 QFN-16 I $5.48 $3.79 Yes
LTC6405IUD#TRPBF 3x3 QFN-16 I $3.85 Yes
Buy NowRequest Samples
* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Part Number Description Price Documentation
DC1147A-F LTC6405 demo circuit $100.00
Buy Now
Click here to view our complete list of demo boards


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

Product Notifications

Please login to your MyLinear account for notifications of datasheet updates, new document releases and LTspice model announcements for your favorite products. If you do not have a MyLinear account you may Sign Up Now.

Forgot your password? Click here.
Need help? Email with questions and comments.

Design Tools


LTspice® software is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice

To launch a ready to run LTspice demonstration circuit for this part:

  • Step 1: If you have not installed LTspice on this computer, download and install LTspice
  • Step 2: Once LTspice is installed, click on the link(s) below to launch the simulation
  • Step 3: If LTspice does not automatically open after clicking the link above, you can instead run the simulation by right clicking on the link and selecting "Save Target As." After saving the file to your computer, start LTspice and open the demonstration circuit by selecting 'Open' from the 'File' menu

To explore other ready to run LTspice demonstration circuits, please visit our Demo Circuits Collection.

Models for the following parts are available in LTspice:

Technical Support