●Product Details
●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.
●Applications
● ADC drivers to 18 bits
● Single-ended-to-differential converters
● Differential filters
● Level shifters
● Differential PCB drivers
● Differential cable drivers
●### Features and Benefits
● 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
