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LTC6401-8

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2.2GHz Low Noise, Low Distortion Differential ADC Driver for DC-140MHz

Data Sheet Product Selection Table
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Overview

  • 2.2GHz –3dB Bandwidth
  • Fixed Gain of 2.5V/V (8dB)
  • –92dBc IMD3 at 70MHz (Equivalent OIP3 = 50dBm)
  • –80.5dBc IMD3 at 140MHz (Equivalent OIP3 = 44dBm)
  • 1nV/√Hz Internal Op Amp Noise
  • 12.1dB Noise Figure
  • Differential Inputs and Outputs
  • 400Ω Input Impedance
  • 2.85V to 3.5V Supply Voltage
  • 45mA Supply Current (135mW)
  • 1V to 1.6V Output Common Mode, Adjustable
  • DC- or AC-Coupled Operation
  • Max Differential Output Swing 4.6VP-P
  • Small 16-Lead 3mm × 3mm × 0.75mm QFN Package

The LTC6401-8 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 LTC6401-8 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 8dB (2.5V/V).

The LTC6401-8 saves space and power compared to alternative solutions using IF gain blocks and transformers. The LTC6401-8 is packaged in a compact 16-lead 3mm × 3mm QFN package and operates over the –40°C to 85°C temperature range.

Applications

  • Differential ADC Driver
  • Differential Driver/Receiver
  • Single Ended to Differential Conversion
  • IF Sampling Receivers
  • SAW Filter Interfacing
LTC6401-8
2.2GHz Low Noise, Low Distortion Differential ADC Driver for DC-140MHz
Equivalent Output IP3 vs Frequency Product Package 1
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Application Note 1

Technical Articles 1

Data Sheet

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

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
LTC6409
RECOMMENDED FOR NEW DESIGNS 10GHz GBW, 1.1nV/√Hz Differential Amplifier/ADC Driver
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Tools & Simulations

LTspice 1

Models for the following parts are available in LTspice:

  • LTC6401-14
  • LTC6401-20
  • LTC6401-26
  • LTC6401-8

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.

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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.

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LTspice

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.

Evaluation Kits

eval board
schematic 1
DC987B-E

LTC6401-8 3GHz Fully Differential ADC Driver Demo Circuit

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Product Details

DC987B-E: Demo Board for the LTC6401-8 2.2GHz Low Noise, Low Distortion Differential ADC Driver for DC-140MHz.
DC987B-E
LTC6401-8 3GHz Fully Differential ADC Driver Demo Circuit
DC987B-A - Schematic

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