LT6411 - 650MHz Differential ADC Driver/Dual Selectable Gain Amplifier

The LT6411 is a dual amplifier with individually selectable gains of +1, +2 and –1. The amplifiers have excellent distortion performance for driving ADCs as well as excellent bandwidth and slew rate for video, data transmission and other high speed applications. Single-ended to differential conversion with a system gain of 2 is particularly straightforward by configuring one amplifier with a gain of +1 and the other amplifier with a gain of –1. The LT6411 can be used on split supplies as large as ±6V and on a single supply as low as 4.5V. Each amplifier draws only 8mA of quiescent current when enabled. When disabled, the output pins become high impedance and each amplifier draws less than 350µA. The LT6411 is manufactured on Linear Technology’s proprietary, low voltage, complimentary, bipolar process and is available in the ultra-compact, 3mm × 3mm, 16pin QFN package.

  • 650MHz –3dB Small-Signal Bandwidth
  • 600MHz –3dB Large-Signal Bandwidth
  • High Slew Rate: 3300V/µs
  • Easily Configured for Single-Ended to Differential Conversion
  • 200MHz ±0.1dB Bandwidth
  • User Selectable Gain of +1, +2 and –1
  • No External Resistors Required
  • 46.5dBm Equivalent OIP3 at 30MHz When Driving an ADC
  • IM3 with 2VP-P Composite, Differential Output: –87dBc at 30MHz, –83dBc at 70MHz
  • –77dB SFDR at 30MHz, 2VP-P Differential Output
  • 6ns 0.1% Settling Time for 2V Step
  • Low Supply Current: 8mA per Ampifier
  • Differential Gain of 0.02%, Differential Phase of 0.01°
  • 50dB Channel Separation at 100MHz
  • Wide Supply Range: ±2.25V (4.5V) to ±6.3V (12.6V)
  • 3mm × 3mm 16-Pin QFN Package
Typical Application
LT6411 Typical Application
LT6411 Typical Application
  • Differential ADC Driver
  • Single-Ended to Differential Conversion
  • Differential Video Line Driver
LT6411 Package Drawing
Order Information
Part NumberPackageTempPrice(1-99)Price (1k)*
LT6411CUD#PBF3x3 QFN-16C$3.39$2.39
LT6411CUD#TRPBF3x3 QFN-16C$2.45
LT6411IUD#PBF3x3 QFN-16I$3.90$2.75
LT6411IUD#TRPBF3x3 QFN-16I$2.81
Demo Boards
Part NumberDescriptionPrice
DC1057ALT6411 driver and LTC2249 ADC combo board, Requires DC718$200.00
DC1108ALT6411 650 MHz Different ADC Driver$50.00
Companion Boards
Part NumberDescriptionPrice
DC718CUSB Data Acquisition Controller, for PScope Evaluation Kits (<135Mbps)$300.00
Reliability Data
Product Selector Card
LT Journal
Press Release
CAD Symbol
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LT6411 - 650MHz Differential ADC Driver/Dual Selectable Gain Amplifier
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R378 Reliability Data
High Speed Amplifiers/ADC Drivers
Jun 2006 650MHz Selectable-Gain Amplifier/Differential ADC Driver Has Small Form but Many Functions
Very Fast Low Distortion, Low Noise Differential Amplifiers/ADC Drivers Simplify System Design
LT6411 Footprints and Symbols