LTC6406 - 3GHz, Low Noise, Rail-to-Rail Input Differential Amplifier/Driver

The LTC6406 is a very low noise, low distortion, fully differential input/output amplifier optimized for 3V, single supply operation. The LTC6406 input common mode range is rail-to-rail, while the output common mode voltage is independently adjustable by applying a voltage on the VOCM pin. This makes the LTC6406 ideal for level shifting signals with a wide common mode range for driving 12-bit to 16-bit single supply, differential input ADCs.

A 3GHz gain-bandwidth product results in 70dB linearity for 50MHz input signals. The LTC6406 is unity gain stable and the closed-loop bandwidth extends from DC to 800MHz. The output voltage swing extends from near-ground to 2V, to be compatible with a wide range of ADC converter input requirements. The LTC6406 draws only 18mA, and has a hardware shutdown feature which reduces current consumption to 300µA.

The LTC6406 is available in a compact 3mm x 3mm 16-pin leadless QFN package as well as an 8-lead MSOP package, and operates over a –40°C to 85°C temperature range.

  • Low Noise: 1.6nV/v√Hz RTI
  • Low Power: 18mA at 3V
  • Low Distortion (HD2/HD3):   –80dBc/–69dBc at 50MHz, 2VP-P   –104dBc/–90dBc at 20MHz, 2VP-P
  • Rail-to-Rail Differential Input
  • 2.7V to 3.5V Supply Voltage Range
  • Fully Differential Input and Output
  • Adjustable Output Common Mode Voltage
  • 800MHz –3dB Bandwidth with AV = 1
  • Gain-Bandwidth Product: 3GHz
  • Low Power Shutdown
  • Available in 8-Lead MSOP and Tiny 16-Lead 3mm x 3mm x 0.75mm QFN Packages
Typical Application
LTC6406 Typical Application
LTC6406 Typical Application
  • Differential Input ADC Driver
  • Single-Ended to Differential Conversion
  • Level-Shifting Ground-Referenced Signals
  • Level-Shifting VCC-Referenced Signals
  • High-Linearity Direct Conversion Receivers
LTC6406 Package Drawing
LTC6406 Package Drawing
Order Information
Part NumberPackageTempPrice(1-99)Price (1k)*
LTC6406CUD#PBF3x3 QFN-16C$4.91$3.44
LTC6406CUD#TRPBF3x3 QFN-16C$3.50
LTC6406IUD#PBF3x3 QFN-16I$5.41$3.79
LTC6406IUD#TRPBF3x3 QFN-16I$3.85
Demo Boards
Part NumberDescriptionPrice
DC1058A-ECombo Demoboard for LTC2207 and LTC6406, req. DC718$200.00
DC1147A-DLTC6406 demo circuit$100.00
Companion Boards
Part NumberDescriptionPrice
DC718CUSB Data Acquisition Controller, for PScope Evaluation Kits (<135Mbps)$300.00
Design Note
Reliability Data
Product Selector Card
LT Journal
Press Release
CAD Symbol
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