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AD8138ARM-REEL Datenblatt(PDF) 1 Page - Analog Devices |
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AD8138ARM-REEL Datenblatt(HTML) 1 Page - Analog Devices |
1 / 16 page REV. E 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. 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 companies. 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 © 2003 Analog Devices, Inc. All rights reserved. AD8138 Low Distortion Differential ADC Driver FEATURES Easy to Use Single-Ended-to-Differential Conversion Adjustable Output Common-Mode Voltage Externally Adjustable Gain Low Harmonic Distortion –94 dBc—Second, –114 dBc—Third @ 5 MHz into 800 Load –87 dBc—Second, –85 dBc—Third @ 20 MHz into 800 Load –3 dB Bandwidth of 320 MHz, G = +1 Fast Settling to 0.01% of 16 ns Slew Rate 1150 V/ s Fast Overdrive Recovery of 4 ns Low Input Voltage Noise of 5 nV/ ÷Hz 1 mV Typical Offset Voltage Wide Supply Range +3 V to 5 V Low Power 90 mW on 5 V 0.1 dB Gain Flatness to 40 MHz Available in 8-Lead SOIC and MSOP Packages APPLICATIONS ADC Driver Single-Ended-to-Differential Converter IF and Baseband Gain Block Differential Buffer Line Driver PIN CONFIGURATION 1 2 3 4 8 7 6 5 AD8138 NC VOCM –OUT V+ NC = NO CONNECT +IN V– –IN +OUT TYPICAL APPLICATION CIRCUIT AIN AIN AVDD DVDD AVSS VREF ADC 499 499 499 499 VIN VOCM +5V +5V DIGITAL OUTPUTS AD8138 + – PRODUCT DESCRIPTION The AD8138 is a major advancement over op amps for differential signal processing. The AD8138 can be used as a single-ended- to-differential amplifier or as a differential-to-differential amplifier. The AD8138 is as easy to use as an op amp, and greatly simplifies differential signal amplification and driving. Manufactured on ADI’s proprietary XFCB bipolar process, the AD8138 has a –3 dB bandwidth of 320 MHz and delivers a differential signal with the lowest harmonic distortion available in a differential amplifier. The AD8138 has a unique internal feedback feature that provides balanced output gain and phase matching, suppressing even order harmonics. The internal feed- back circuit also minimizes any gain error that would be associated with the mismatches in the external gain setting resistors. The AD8138’s differential output helps balance the input-to- differential ADCs, maximizing the performance of the ADC. The AD8138 eliminates the need for a transformer with high performance ADCs, preserving the low frequency and dc infor- mation. The common-mode level of the differential output is adjustable by a voltage on the VOCM pin, easily level-shifting the input signals for driving single-supply ADCs. Fast overload recovery preserves sampling accuracy. The AD8138 distortion performance makes it an ideal ADC driver for communication systems, with distortion performance good enough to drive state-of-the-art 10-bit to 16-bit converters at high frequencies. The AD8138’s high bandwidth and IP3 also make it appropriate for use as a gain block in IF and baseband signal chains. The AD8138 offset and dynamic performance make it well suited for a wide variety of signal processing and data acquisition applications. The AD8138 is available in both SOIC and MSOP packages for operation over –40 ∞C to +85∞C temperatures. |
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Ähnliche Beschreibung - AD8138ARM-REEL |
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