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LTC6419

RECOMMENDED FOR NEW DESIGNS

Dual 10GHz GBW, 1.1nV/√Hz Differential Amplifier/ADC Driver

Data Sheet Product Selection Table
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Overview

  • 10GHz Gain-Bandwidth Product
  • 85dB SFDR at 100MHz, 2VP-P
  • 1.1nV/√Hz Input Noise Density
  • Channel Separation 95dB at 100MHz
  • Input Range Includes Ground
  • External Resistors Set Gain (Min 1V/V)
  • 3300V/μs Differential Slew Rate
  • 52mA Supply Current (Per Amplifier)
  • 2.7V to 5.25V Supply Voltage Range
  • Fully Differential Input and Output
  • Adjustable Output Common Mode Voltage
  • Low Power Shutdown
  • Small 20-Lead 4mm × 3mm × 0.75mm LQFN Package

The LTC6419 is a dual very high speed, low distortion, differential amplifier. Its input common mode range includes ground, so that a ground-referenced single-ended or differential input signal can be DC-coupled, level-shifted, and converted to drive an ADC differentially.

The gain and feedback resistors are external, so that the exact gain and frequency response can be tailored to each application. For example, the amplifier could be externally compensated in a no-overshoot configuration, which is desired in certain time-domain applications.

The LTC6419 is stable in a differential gain of 1. This allows for low output noise in applications where gain is not desired. Each amplifier draws 52mA of supply current and has an independent shutdown pin which reduces current consumption to 100μA per amplifier.

The LTC6419 is available in a compact 4mm × 3mm 20‑pin LQFN package and operates over a –40°C to 125°C temperature range.

Applications

  • Broadband I/Q Amplifiers
  • Dual Differential ADC Driver
  • High-Speed Data-Acquisition Cards
  • Automated Test Equipment
  • Time Domain Reflectometry
  • Communications Receivers
LTC6419
Dual 10GHz GBW, 1.1nV/√Hz Differential Amplifier/ADC Driver
DC-Coupled Interface from a Ground-Referenced Single-Ended Input to an LTC2175-14 ADC 1/2 LTC6419 Driving 1/4 LTC2175-14 ADC, fIN = 45MHz, –1dBFS, fS = 125MHz, 32768-Point FFT Product Package 1
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 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
Analog to Digital Converters (ADCs) 1
LTC2158-14
NOT RECOMMENDED FOR NEW DESIGNS Dual 14-Bit 310Msps ADC
Modulators & Demodulators 1
LTC5585
PRODUCTION Wideband IQ Demodulator with IIP2 and DC Offset Control
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Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

  • LTC6419

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.

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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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Signal Chain Designer

Signal Chain Designer is a web-based tool designed to create and simulate complex precision signal chains. See your circuit’s performance before you commit to your PCB: transfer function, noise, power consumption, input range, and DC error. Quickly experiment with different parts and architectures. Signal chains can be exported to LTspice for further analysis.

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.

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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.

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