AD8139

低噪声，轨到轨差分ADC驱动器 Low Noise, Rail-to-Rail, Differential ADC Driver

Product Details

The 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

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ADC drivers to 18 bits

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Single-ended-to-differential converters

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Differential filters

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Level shifters

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Differential PCB drivers

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Differential cable drivers

### Features and Benefits

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Fully differential

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Low noise

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2.25 nV/√Hz

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2.1 pA/√Hz

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Low harmonic distortion

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98 dBc SFDR at 1 MHz

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85 dBc SFDR at 5 MHz

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72 dBc SFDR at 20 MHz

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High speed

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410 MHz, 3 dB BW G = 1

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800 V/µs slew rate

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45 ns settling time to 0.01%

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69 dB output balance at 1 MHz

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80 dB dc CMRR

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Low offset: ±0.5 mV maximum

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Low input offset current: 0.5 µA maximum

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Differential input and output

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Differential-to-differential or single-ended-to-differential operation

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Rail-to-rail output

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Adjustable output common-mode voltage

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Wide supply voltage range: 5 V to 12 V

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Available in a small SOIC package and an 8-lead LFCSP