6500V/µs, Wideband, High-Output-Current, Single-Ended-to-Differential Line Drivers with Enable

Industry's Fastest Differential Line Drivers

Please check latest availability status for a specific part variant.


The MAX4447/MAX4448/MAX4449 single-ended-to-differential line drivers are designed for high-speed communications. Using current feedback for greater bandwidth, these devices deliver full-power bandwidths up to 405MHz and feature slew rates as high as 6500V/µs. The MAX4447 has a fixed gain of +2V/V and a small-signal bandwidth of 430MHz. The MAX4448/MAX4449 have small-signal bandwidths of 330MHz and 400MHz, respectively, and are internally compensated for minimum gain configurations of +2V/V and +5V/V, respectively. For greater design flexibility, the MAX4448/MAX4449 allow for variable gain selection using external gain-setting resistors. A low-power enable mode reduces current consumption below 5.5mA and places the outputs in a high-impedance state.

The MAX4447/MAX4448/MAX4449 can deliver differential output swings of ±6.2V from ±5V supplies with a 50Ω load. Excellent differential gain/phase and noise specifications make these amplifiers ideal for a wide variety of video and RF signal-processing and transmission applications.
MAX4447, MAX4448, MAX4449: Typical Operating Circuit MAX4447, MAX4448, MAX4449: Typical Operating Circuit Enlarge+

Key Features

  • 6500V/µs Slew Rate (MAX4449)
  • Small-Signal Bandwidth
    • 430MHz (MAX4447)
    • 330MHz (MAX4448)
    • 400MHz (MAX4449)
  • 200MHz 0.1dB Gain Flatness (MAX4447)
  • 130mA Output Drive Current
  • +2V/V Internally Fixed Gain (MAX4447)
  • External Gain Selection
    • >+2V/V (MAX4448)
    • >+5V/V (MAX4449)
  • -78dB SFDR at 100kHz
  • Low Differential Gain/Phase: 0.01%/0.02°
  • Ultra-Low Noise: 23nV per root-Hz at fIN = 1MHz
  • 8ns Settling Time to 0.1%


  • Coaxial to Twisted-Pair Converter
  • Differential ADC Driver
  • Differential Line Driver
  • Differential Pulse Amplifier
  • High-Speed Differential Transmitter
  • Single-Ended-to-Differential Conversion
  • Video and RF Signal Processing and Transmission
  • xDSL Applications

See parametric specs for Video/Wideband Line Drivers/Receivers (6)

Part NumberFunctionsBW
Slew Rate
Diff. Phase/ Gain
Package/PinsOper. Temp.
(@ -3dB)(typ)(min)(0.1dB min)(See Notes)
MAX4447 Driver430
SOIC (N)/16
-40 to +85$0.65 @1k
MAX4448 3304300240
SOIC (N)/16
$3.09 @1k
MAX4449 40065005140
SOIC (N)/16
$3.02 @1k

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

MAX4447EVKIT: Evaluation Kit for the MAX4447, MAX4448, and MAX4449
MAX4448EVKIT: Evaluation Kit for the MAX4447, MAX4448, and MAX4449
MAX4449EVKIT: Evaluation Kit for the MAX4447, MAX4448, and MAX4449
Request Reliability Report for: MAX4448 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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