Low Cost 270 MHz Differential Receiver Amplifiers AD8129/AD8130 FEATURES CONNECTION DIAGRAM High speed AD8129/ AD8130: 270 MHz, 1090 V/s G = +1 AD8130 1 8 IN +IN AD8129: 200 MHz, 1060 V/s G = +10 V 2 +V High CMRR 7 S S + 94 dB min, dc to 100 kHz 3 6 OUT PD 80 dB min 2 MHz REF 4 5 FB 70 dB 10 MHz High input impedance: 1 M differential Figure 1. Input common-mode range 10.5 V Low noise The AD8129/AD8130 are differential-to-single-ended amplifiers AD8130: 12.5 nV/Hz with extremely high CMRR at high frequency. Therefore, they AD8129: 4.5 nV/Hz can also be effectively used as high speed instrumentation amps Low distortion, 1 V p-p 5 MHz AD8130, 79 dBc worst harmonic 5 MHz or for converting differential signals to single-ended signals. AD8129, 74 dBc worst harmonic 5 MHz The AD8129 is a low noise, high gain (10 or greater) version User-adjustable gain No external components for G = +1 intended for applications over very long cables, where signal Power supply range +4.5 V to 12.6 V attenuation is significant. The AD8130 is stable at a gain of 1 Power-down and can be used for applications where lower gains are required. Both have user-adjustable gain to help compensate for losses in APPLICATIONS the transmission line. The gain is set by the ratio of two resistor High speed differential line receivers values. The AD8129/AD8130 have very high input impedance Differential-to-single-ended converters on both inputs, regardless of the gain setting. High speed instrumentation amps Level shifting GENERAL DESCRIPTION The AD8129/AD8130 have excellent common-mode rejection (70 dB 10 MHz), allowing the use of low cost, unshielded The AD8129/AD8130 are designed as receivers for the twisted-pair cables without fear of corruption by external noise transmission of high speed signals over twisted-pair cables to sources or crosstalk. The AD8129/AD8130 have a wide power work with the AD8131 or AD8132 drivers. Either can be used supply range from single +5 V to 12 V, allowing wide common- for analog or digital video signals and for high speed data mode and differential-mode voltage ranges while maintaining transmission. signal integrity. The wide common-mode voltage range enables 120 the driver-receiver pair to operate without isolation transformers 110 in many systems where the ground potential difference between drive and receive locations is many volts. The AD8129/AD8130 100 have considerable cost and performance improvements over 90 op amps and other multiamplifier receiving solutions. 80 +V S 70 PD 3 60 1 V IN 7 8 50 V 6 OUT 4 2 40 5 30 10k 100k 1M 10M 100M R R G F FREQUENCY (Hz) Figure 2. AD8129 CMRR vs. Frequency V S V =V 1+(R /R ) OUT IN F G Figure 3. Typical Connection Configuration Rev. C 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 2005 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. CMRR (dB) 02464-002 02464-001 02464-003AD8129/AD8130 TABLE OF CONTENTS Features .............................................................................................. 1 Theory of Operation ...................................................................... 32 Applications....................................................................................... 1 Op Amp Configuration............................................................. 32 Connection Diagram ....................................................................... 1 Applications..................................................................................... 33 General Description ......................................................................... 1 Basic Gain Circuits..................................................................... 33 Revision History ............................................................................... 2 Twisted-Pair Cable, Composite Video Receiver with Equalization Using an AD8130................................................... 33 AD8129/AD8130 Specifications..................................................... 3 Output Offset/Level Translator ................................................ 34 5 V Specifications ......................................................................... 3 Resistorless Gain of 2 ................................................................. 35 5 V Specifications....................................................................... 5 Summer ....................................................................................... 35 12 V Specifications..................................................................... 7 Cable-Tap Amplifier .................................................................. 35 Absolute Maximum Ratings............................................................ 9 Power-Down ............................................................................... 36 Thermal Resistance ...................................................................... 9 Extreme Operating Conditions................................................ 36 ESD Caution.................................................................................. 9 Power Dissipation....................................................................... 37 Typical Performance Characteristics ........................................... 10 Layout, Grounding, and Bypassing.......................................... 38 AD8130 Frequency Response Characteristics........................ 10 Outline Dimensions....................................................................... 39 AD8129 Frequency Response Characteristics........................ 13 Ordering Guide .......................................................................... 40 AD8130 Harmonic Distortion Characteristics ...................... 16 AD8129 Harmonic Distortion Characteristics ...................... 18 AD8130 Transient Response Characteristics.......................... 23 AD8129 Transient Response Characteristics.......................... 26 REVISION HISTORY 11/05Rev. B to Rev. C 3/05Rev. 0 to Rev. A Changes to 5 V Specifications......................................................... 3 Changes to Specifications.................................................................2 Changes to Table 4 and Maximum Power Dissipation Section.. 9 Replaced Figure 3 ..............................................................................5 Changes to Figure 16...................................................................... 11 Changes to Ordering Guide .............................................................6 Changes to Figure 17...................................................................... 12 Updated Outline Dimensions....................................................... 27 Revision 0: Initial Version 9/05Rev. A to Rev. B Extended Temperature Range...........................................Universal Deleted Figure 5................................................................................ 5 Added Thermal Resistance Section ............................................... 9 Updated Outline Dimensions ....................................................... 39 Changes to Ordering Guide .......................................................... 40 Rev. C Page 2 of 40