MAX4449:6500V/µs, Wideband, High-Output-Current, Single-Ended-to-Differential Line Drivers with Enable

Industry's Fastest Differential Line Drivers

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.

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%
MAX4447, MAX4448, MAX4449: Typical Operating Circuit
MAX4447, MAX4448, MAX4449: Typical Operating Circuit
Applications/Uses
  • 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
DataSheet
titleDownload file
MAX4447-MAX4449 Data SheetMAX4447-MAX4449.pdf
Parametrics
Part NumberFunctionsBW
(MHz)
VSUPPLY
(V)
ICC
(mA)
IOUT
(mA)
Slew Rate
(V/µs)
Diff. Phase/ Gain
(deg/%)
AV
(V/V)
BW
(MHz)
Package/PinsOper. Temp.
(°C)
Budgetary
Price
@ -3dBtypmin0.1dB minSee Notes
MAX4447Driver430-5
5
469057000.02/0.012200SOIC(N)/16-40 to +85$2.94 @1k
MAX44483304300240SOIC(N)/16$2.94 @1k
MAX444940065005140SOIC(N)/16$2.88 @1k
Design kits & evaluation modules
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX4449ESENo Longer AvailableMAX4449ESE+SOIC(N),;16 pin;62 mm²-40°C to +85°CNo
MAX4449ESE+ActiveSOIC(N),;16 pin;62 mm²-40°C to +85°CLead Free
MAX4449ESE+TActiveSOIC(N),;16 pin;62 mm²-40°C to +85°CLead Free
MAX4449ESE-TNo Longer AvailableMAX4449ESE+TN.SO;16 pin-40°C to +85°CSee data sheet
MAX4447-MAX4449.pdf MAX4449
MAX4447-MAX4449.pdf MAX4449