LTC6409
10GHz GBW, 1.1nV/√Hz Differential Amplifier/ADC Driver
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Features
- 10GHz Gain-Bandwidth Product
- 88dB SFDR at 100MHz, 2VP-P
- 1.1nV/√Hz Input Noise Density
- Input Range Includes Ground
- External Resistors Set Gain (Min 1V/V)
- 3300V/μs Differential Slew Rate
- 52mA Supply Current
- 2.7V to 5.25V Supply Voltage Range
- Fully Differential Input and Output
- Adjustable Output Common Mode Voltage
- Low Power Shutdown
- Small 10-Lead 3mm × 2mm × 0.75mm QFN Package
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The LTC6409 is a very high speed, low distortion, differential amplifier. Its input common mode range includes ground, so that a ground-referenced 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 LTC6409 is stable in a differential gain of 1. This allows for a low output noise in applications where gain is not desired. It draws 52mA of supply current and has a hardware shutdown feature which reduces current consumption to 100μA.
The LTC6409 is available in a compact 3mm × 2mm 10‑pin leadless QFN package and operates over a –40°C to 125°C temperature range.
Applications
- Differential Pipeline ADC Driver
- High-Speed Data-Acquisition Cards
- Automated Test Equipment
- Time Domain Reflectometry
- Communications Receivers
Ask a Question
Submit your question below and we will return the best answer from ADI’s knowledge database:
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Analog Devices Support Portal is a one-stop shop to answer all your ADI questions.
Visit the ADI Support Page
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LTC6409
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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. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
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| LTC6409CUDB#TRMPBF |
10-Lead QFN (3mm x 2mm x 0.75mm)
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10-Lead QFN (3mm x 2mm x 0.75mm)
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| LTC6409HUDB#TRMPBF |
10-Lead QFN (3mm x 2mm x 0.75mm)
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| LTC6409HUDB#TRPBF |
10-Lead QFN (3mm x 2mm x 0.75mm)
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| LTC6409IUDB#TRMPBF |
10-Lead QFN (3mm x 2mm x 0.75mm)
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| LTC6409IUDB#TRPBF |
10-Lead QFN (3mm x 2mm x 0.75mm)
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- LTC6409CUDB#TRMPBF
- Pin/Package Drawing
-
10-Lead QFN (3mm x 2mm x 0.75mm)
- Documentation
-
HTML
Material Declaration
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HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
-
Ultra Librarian
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SamacSys
- LTC6409CUDB#TRPBF
- Pin/Package Drawing
-
10-Lead QFN (3mm x 2mm x 0.75mm)
- Documentation
-
HTML
Material Declaration
-
HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
-
Ultra Librarian
-
SamacSys
- LTC6409HUDB#TRMPBF
- Pin/Package Drawing
-
10-Lead QFN (3mm x 2mm x 0.75mm)
- Documentation
-
HTML
Material Declaration
-
HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
-
Ultra Librarian
-
SamacSys
- LTC6409HUDB#TRPBF
- Pin/Package Drawing
-
10-Lead QFN (3mm x 2mm x 0.75mm)
- Documentation
-
HTML
Material Declaration
-
HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
-
Ultra Librarian
-
SamacSys
- LTC6409IUDB#TRMPBF
- Pin/Package Drawing
-
10-Lead QFN (3mm x 2mm x 0.75mm)
- Documentation
-
HTML
Material Declaration
-
HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
-
Ultra Librarian
-
SamacSys
- LTC6409IUDB#TRPBF
- Pin/Package Drawing
-
10-Lead QFN (3mm x 2mm x 0.75mm)
- Documentation
-
HTML
Material Declaration
-
HTML
Reliablity Data
- CAD Symbols, Footprints, and 3D Models
-
Ultra Librarian
-
SamacSys
Software & Part Ecosystem
| Parts | Product Life Cycle | Description | ||
|---|---|---|---|---|
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Standard High Speed A/D Converters1 |
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PRODUCTION |
14-Bit, 150Msps Ultralow Power 1.8V ADC |
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| Parts | Product Life Cycle | Description |
|---|---|---|
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RECOMMENDED FOR NEW DESIGNS |
Dual 10GHz GBW, 1.1nV/√Hz Differential Amplifier/ADC Driver |
Evaluation Kits 4
DC1945A
LTC2185 and LTC6409 Combo Board with differential inputs, requires DC890, LVDS_XFMR and DC1075
Product Detail
DC1945A: Demo Board for the LTC2185 - 16-Bit, 125Msps Low Power Dual ADCs and LTC6409 - 10GHz GBW, 1.1nV/√Hz Differential Amplifier/ADC Driver.
Resources
DC2266A
LTC2107 and LTC6409 Demo Board | 16-Bit, 210Msps ADC and Driver Combo Board, DC-100MHz Input, DDR LVDS Outputs, (Requires DC1371 and DC2219)
Product Detail
Demonstration circuit 2266A features the LTC2107, 210Msps ADC, and the LTC6409 low noise amplifier. DC2266A supports the LTC2107 DDR LVDS output mode.
The circuitry on the analog inputs is optimized for analog input frequencies from DC to 100MHz. When driven with a 50Ω source, the gain will be 6dB. To modify the input for other input ranges or gains refer to the LTC6409 data sheet.
Resources
DC1760A
LTC2261-14 + LTC6409 ADC and Driver Combo Board,DC-100MHz, CMOS Outputs, requires DC890 and DC1075
Product Detail
DC1760A Demo Board for:
LTC2261-14 14-Bit, 125Msps Ultra-Low Power 1.8V ADCs
LTC6409 10GHz GBW, 1.1nV/√Hz Differential Amplifier/ADC Driver
Resources
DC1591A
LTC6409 | 10GHz, 1nV/√(Hz) Differential Amplifier/ADC Driver
Product Detail
DC1591A: Demo Board for the LTC6409 10GHz GBW, 1.1nV/√Hz Differential Amplifier/ADC Driver.
Resources
Evaluation Kits4
Tools & Simulations 5
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.
To launch ready-to-run LTspice demonstration circuits for this part:
Step 1: Download and install LTspice on your computer.
Step 2: Click on the link in the section below to download a demonstration circuit.
Step 3: If LTspice does not automatically open after clicking the link below, 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.
Lt Spice
Sys-Parameter
ADI DiffAmpCalc™
ADIsimRF
Signal Chain Designer - BETA
