GENERAL DESCRIPTION
The AD8139 is an ultralow noise, high performance differential amplifier with rail-to-rail output. With its low noise, high SFDR, and wide bandwidth, it is an ideal choice for driving analog-to-digital converters (ADCs) with resolutions to 18 bits. The AD8139 is easy to apply, and its internal common-mode feedback architecture allows its output common-mode voltage to be controlled by the voltage applied to one pin. The internal feedback loop also provides outstanding output balance as well as suppression of even-order harmonic distortion products. Fully differential and single-ended-to-differential gain configurations are easily realized by the AD8139. Simple external feedback networks consisting of four resistors determine the closed-loop gain of the amplifier.

FEATURES
   Fully differential
   Low noise
      2.25 nV/√Hz
      2.1 pA/√Hz
   Low harmonic distortion
      98 dBc SFDR at 1 MHz
      85 dBc SFDR at 5 MHz
      72 dBc SFDR at 20 MHz
   High speed
      410 MHz, 3 dB BW (G = 1)
      800 V/µs slew rate
      45 ns settling time to 0.01%
   69 dB output balance at 1 MHz
   80 dB dc CMRR
   Low offset: ±0.5 mV maximum
   Low input offset current: 0.5 µA maximum
   Differential input and output
   Differential-to-differential or single-ended-to-differential
      operation
   Rail-to-rail output
   Adjustable output common-mode voltage
   Wide supply voltage range: 5 V to 12 V
   Available in a small SOIC package and an 8-lead LFCSP
  
APPLICATIONS
   ADC drivers to 18 bits
   Single-ended-to-differential converters
   Differential filters
   Level shifters
   Differential PCB drivers
   Differential cable drivers