LTC6400-26 - 1.9GHz Low Noise, Low Distortion Differential ADC Driver for DC-300MHz

The LTC6400-26 is a high-speed differential amplifier targeted at processing signals from DC to 300MHz. The part has been specifically designed to drive 12-, 14- and 16-bit ADCs with low noise and low distortion, but can also be used as a general-purpose broadband gain block. The LTC6400-26 is easy to use, with minimal support circuitry required. The output common mode voltage is set using an external pin, independent of the inputs, which eliminates the need of transformers or AC-coupling capacitors in many applications. The gain is internally fixed at 26dB (20V/V). The LTC6400-26 saves space and power compared to alternative solutions using IF gain blocks and transformers. The LTC6400-26 is packaged in a compact 16-lead 3mm x 3mm QFN package and operates over the -40°C to 85°C temperature range.

Features
  • 1.9GHz -3dB Bandwidth
  • Fixed Gain of 20V/V (26dB)
  • -94dBc IMD3 at 70MHz (Equivalent OIP3 = 51dBm)
  • -71dBc IMD3 at 300MHz (Equivalent OIP3 = 39.5dBm)
  • 1nV/√Hz Internal Op Amp Noise
  • 1.5nV/√Hz Total Input Referred Noise
  • 6.8dB Noise Figure
  • Differential Inputs and Outputs
  • 50Ω Input Impedance
  • 2.85V to 3.5V Supply Voltage
  • 85mA Supply Current (255mW)
  • 1V to 1.6V Output Common Mode, Adjustable
  • DC- or AC-Coupled Operation
  • Max Differential Output Swing 4.7VP-P
  • Small 16-Lead 3mm × 3mm x 0.75mm QFN Package
Typical Application
LTC6400-26 Typical Application
LTC6400-26 Typical Application
Applications
  • Differential ADC Driver
  • Differential Driver/Receiver
  • Single Ended to Differential Conversion
  • IF Sampling Receivers
  • SAW Filter Interfacing
Packaging
LTC6400-26 Package Drawing
Order Information
Part NumberPackageTempPrice(1-99)Price (1k)*
LTC6400CUD-26#PBF3x3 QFN-16C$4.57$3.20
LTC6400CUD-26#TRPBF3x3 QFN-16C$3.26
LTC6400IUD-26#PBF3x3 QFN-16I$5.26$3.68
LTC6400IUD-26#TRPBF3x3 QFN-16I$3.74
Demo Boards
Part NumberDescriptionPrice
DC987B-DLTC6400-26 3GHz Fully Differential ADC Driver Demo Circuit$100.00
Datasheet
Application Note
Design Note
Reliability Data
Product Selector Card
CAD Symbol
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High Speed Amplifiers/ADC Drivers
LTC6400-26 Footprints and Symbols