GENERAL DESCRIPTION
The AD8131 is a differential or single-ended input to differential output driver requiring no external components for a fixed gain of 2. The AD8131 is a major advancement over op amps for driving signals over long lines or for driving differential input ADCs. The AD8131 has a unique internal feedback feature that provides output gain and phase matching that are balanced to −60 dB at 10 MHz, reducing radiated EMI and suppressing harmonics. Manufactured on the Analog Devices, Inc. next generation XFCB bipolar process, the AD8131 has a −3 dB bandwidth of 400 MHz and delivers a differential signal with very low harmonic distortion.
The AD8131 is a differential driver for the transmission of high-speed signals over low-cost twisted pair or coax cables. The AD8131 can be used for either analog or digital video signals or for other high-speed data transmission. The AD8131 driver is capable of driving either Cat3 or Cat5 twisted pair or coax with minimal line attenuation. The AD8131 has considerable cost and performance improvements over discrete line driver solutions.
The AD8131 can replace transformers in a variety of applications, preserving low frequency and dc information. The AD8131 does not have the susceptibility to magnetic interference and hysteresis of transformers. It is smaller, easier to work with, and has the high reliability associated with ICs.

FEATURES
  High speed
     400 MHz, −3 dB full power bandwidth
     2000 V/μs slew rate
  Fixed gain of 2 with no external components
  Internal common-mode feedback to improve gain and phase
     balance: −60 dB @ 10 MHz
  Separate input to set the common-mode output voltage
  Low distortion: 68 dB SFDR @ 5 MHz 200 Ω load
  Power supply range +2.7 V to ±5 V
 
APPLICATIONS
  Video line driver
  Digital line driver
  Low power differential ADC driver
  Differential in/out level shifting
  Single-ended input to differential output driver