AD8139 Datasheet

• 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

• ADC drivers to 18 bits
• Single-ended-to-differential converters
• Differential filters
• Level shifters
• Differential PCB drivers
• Differential cable drivers

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.

The AD8139 is manufactured on the proprietary Analog Devices, Inc., second-generation XFCB process, enabling it to achieve low levels of distortion with input voltage noise of only 2.25 nV/√Hz.

The AD8139 is available in an 8-lead SOIC package with an exposed paddle (EP) on the underside of its body and a 3 mm × 3 mm LFCSP. It is rated to operate over the temperature range of −40°C to +125°C.