Features and Benefits
- 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.
- Broadband I/Q Amplifiers
- Dual Differential ADC Driver
- High-Speed Data-Acquisition Cards
- Automated Test Equipment
- Time Domain Reflectometry
- Communications Receivers
Product Lifecycle 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)
Demonstration circuit 2473A features the LTC6419 Dual Differential Amplifier/ADC Driver. It incorporates a variety of passive components to support configurations for varied applications. These fully-differential amplifiers accept single-ended or differential input with almost no difference in distortion performance.
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 contain behavioral parameters, such as P1dB, IP3, gain, noise figure and return loss, which describe nonlinear and linear characteristics of a device.
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.
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.
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.
Sample & Buy
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.