Features and Benefits

  • 1.3GHz -3dB Bandwidth
  • Fixed Gain of 10V/V (20dB)
  • –93dBc IMD3 at 70MHz (Equivalent OIP3 = 50.5dBm)
  • –74dBc IMD3 at 140MHz (Equivalent OIP3 = 41dBm)
  • 1nV/√Hz Internal Op Amp Noise
  • 2.1nV/√Hz Total Input Noise
  • 6.2dB Noise Figure
  • Differential Inputs and Outputs
  • 200 Input Impedance
  • 2.85V to 3.5V Supply Voltage
  • 50mA Supply Current (150mW)
  • 1V to 1.6V Output Common Mode Voltage, Adjustable
  • DC- or AC-Coupled Operation
  • Max Differential Output Swing 4.4VP-P
  • Small 16-Lead 3mm × 3mm × 0.75mm QFN Package

Product Details

The LTC6401-20 is a high-speed differential amplifier targeted at processing signals from DC to 140MHz. The part has been specifically designed to drive 12-, 14- and 16-bit ADCs with low noise and low distortion, but can also be used as a general-purpose broadband gain block.

The LTC6401-20 is easy to use, with minimal support circuitry required. The output common mode voltage is set using an external pin, independent of the inputs, which eliminates the need for transformers or AC-coupling capacitors in many applications. The gain is internally fixed at 20dB (10V/V).

The LTC6401-20 saves space and power compared to alternative solutions using IF gain blocks and transformers. The LTC6401-20 is packaged in a compact 16-lead 3mm × 3mm QFN package and operates over the –40°C to 85°C temperature range.


  • Differential ADC Driver
  • Differential Driver/Receiver
  • Single Ended to Differential Conversion
  • IF Sampling Receivers
  • SAW Filter Interfacing

Product Lifecycle icon-recommended Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

Evaluation Kits (1)

Tools & Simulations


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.


Models for the following parts are available in LTspice:



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.

Design Tools


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.

Design Resources

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.

Support & Discussions

LTC6401-20 Discussions

ADRV9002 Receiver gain
1 day(s) ago in Design Support ADRV9001 – ADRV9007
RE: Low frequency compressor
6 day(s) ago in SigmaDSP Processors and SigmaStudio Development Tool

Sample & Buy

Sample & Buy functionality exists in desktop site
Check Inventory

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 Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

Price Table Help

Evaluation Boards Pricing displayed is based on 1-piece.
Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.
Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.