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AD8139ARD-REEL7 Datasheet(PDF) 1 Page - Analog Devices |
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AD8139ARD-REEL7 Datasheet(HTML) 1 Page - Analog Devices |
1 / 24 page Low Noise Rail-to-Rail Differential ADC Driver AD8139 Rev. A Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.326.8703 © 2004 Analog Devices, Inc. All rights reserved. FEATURES Fully differential Low noise 2.25 nV/√Hz 2.1 pA/√Hz Low harmonic distortion 98 dBc SFDR @ 1 MHz 85 dBc SFDR @ 5 MHz 72 dBc SFDR @ 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 @ 1 MHz 80 dB dc CMRR Low offset: ±0.5 mV max Low input offset current: 0.5 µA max 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 small SOIC package APPLICATIONS ADC drivers to 18 bits Single-ended-to-differential converters Differential filters Level shifters Differential PCB board drivers Differential cable drivers FUNCTIONAL BLOCK DIAGRAM –IN 1 VOCM 2 V+ 3 +OUT 4 +IN 8 NC 7 V– 6 –OUT 5 NC = NO CONNECT AD8139 Figure 1. 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 ADCs with resolutions to 18 bits. The AD8139 is easy to apply, and its in- ternal 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 out- standing 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 a total of four resistors determine the amplifier’s closed-loop gain. The AD8139 is manufactured on ADI’s proprietary second gen- eration XFCB process, enabling it to achieve low levels of distor- tion with input voltage noise of only 1.85 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. 1 10 100 1k 10k 100k 1M 10M 1G 100M 10 100 FREQUENCY (Hz) Figure 2. Input Voltage Noise vs. Frequency |
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