Low Distortion Differential ADC Driver AD8138-EP FEATURES PIN CONFIGURATION Adjustable output common-mode voltage AD8138-EP Low harmonic distortion IN 1 8 +IN 94 dBc SFDR 5 MHz V 2 7 NC OCM V+ 3 6 V 85 dBc SFDR 20 MHz +OUT 4 5 OUT 3 dB bandwidth of 320 MHz, G = +1 Fast settling to 0.01% of 16 ns NC = NO CONNECT Figure 1. Fast overdrive recovery of 4 ns Low input voltage noise of 5 nV/Hz Low power 90 mW on 5 V TYPICAL APPLICATION CIRCUIT ENHANCED PRODUCT FEATURES 5V 5V 499 Supports defense and aerospace applications (AQEC) Extended temperature range 55C to +105C 499 AVDD DVDD V IN + Controlled manufacturing baseline AIN V OCM DIGITAL ADC AD8138-EP One assembly/test site OUTPUTS 499 AIN V AVSS REF One fabrication site Enhanced product change notification 499 Qualification data available on request Figure 2. APPLICATIONS ADC drivers The AD8138-EPs differential output helps balance the input to Single-ended-to-differential converters the differential ADCs, maximizing the performance of the ADC. IF and baseband gain blocks Differential buffers The AD8138-EP eliminates the need for a transformer with Line drivers high performance ADCs, preserving the low frequency and dc information. The common-mode level of the differential output GENERAL DESCRIPTION is adjustable by a voltage on the V pin, easily level-shifting OCM the input signals for driving single-supply ADCs. Fast overload The AD8138-EP is a major advancement over op amps for recovery preserves sampling accuracy. differential signal processing. The AD8138-EP can be used as a single-ended-to-differential amplifier or as a differential-to- The AD8138-EP distortion performance makes it an ideal ADC differential amplifier. The AD8138-EP is as easy to use as an op driver for communication systems, with distortion performance amp and greatly simplifies differential signal amplification and good enough to drive state-of-the-art 10-bit to 16-bit converters driving. Manufactured on Analog Devices, Inc., proprietary XFCB at high frequencies. The AD8138-EPs high bandwidth and IP3 also bipolar process, the AD8138-EP has a 3 dB bandwidth of 320 MHz make it appropriate for use as a gain block in IF and baseband and delivers a differential signal with the lowest harmonic distortion signal chains. The AD8138-EP offset and dynamic performance available in a differential amplifier. The AD8138-EP has a unique make it well suited for a wide variety of signal processing and internal feedback feature that provides balanced output gain and data acquisition applications. The AD8138-EP is available in the phase matching, suppressing even order harmonics. The internal MSOP package for operation over 55C to +105C temperatures. feedback circuit also minimizes any gain error that would be associated with the mismatches in the external gain setting resistors. Full details about this enhanced product are available in the AD8138 data sheet, which should be consulted in conjunction with this data sheet. Rev. 0 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 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 www.analog.com license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Fax: 781.461.3113 2010 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. 08997-001 08997-002AD8138-EP TABLE OF CONTENTS Features .............................................................................................. 1 VOCM to OUT Specifications ......................................................6 Enhanced Product Features ............................................................ 1 Absolute Maximum Ratings ............................................................7 Applications ....................................................................................... 1 Thermal Resistance .......................................................................7 General Description ......................................................................... 1 Maximum Power Dissipation ......................................................7 Pin Configuration ............................................................................. 1 ESD Caution...................................................................................7 Typical Application Circuit ............................................................. 1 Maximum Output Voltage Swing ................................................8 Revision History ............................................................................... 2 Pin Configuration and Function Descriptions ..............................9 Specif icat ions ..................................................................................... 3 Outline Dimensions ....................................................................... 10 DIN to OUT Specifications ...................................................... 3 Ordering Guide .......................................................................... 10 VOCM to OUT Specifications ..................................................... 4 DIN to OUT Specifications ...................................................... 5 REVISION HISTORY 4/10Revision 0: Initial Version Rev. 0 Page 2 of 12