2 GHz, Ultralow Distortion, Differential RF/IF Amplifier Data Sheet AD8352 FEATURES FUNCTIONAL BLOCK DIAGRAM 3 dB bandwidth of 2.2 GHz (A = +10 dB) V VCM ENB BIAS CELL Single resistor gain adjust: 3 dB A 25 dB V VCC Single resistor and capacitor distortion adjust RGP Input resistance: 3 k, independent of gain (A ) V Differential or single-ended input to differential output RDP Low noise input stage: 2.7 nV/Hz RTI at A = 10 dB V + VOP VIP Low broadband distortion C D R R G D 10 MHz: 86 dBc HD2, 82 dBc HD3 VIN 70 MHz: 84 dBc HD2, 82 dBc HD3 VON 190 MHz: 81 dBc HD2, 87 dBc HD3 RDN OIP3 of 41 dBm at 150 MHz GND RGN Slew rate: 8 V/ns AD8352 Fast settling and overdrive recovery of <2 ns Figure 1. Single-supply operation: 3 V to 5.5 V Low power dissipation: 37 mA typical at 5 V Power-down capability: 5 mA at 5 V Fabricated using the high speed XFCB3 SiGe process APPLICATIONS Differential ADC drivers Single-ended-to-differential conversion RF/IF gain blocks SAW filter interfacing GENERAL DESCRIPTION The AD8352 is a high performance differential amplifier 3 mm 3 mm, 16-lead LFCSP and operates over a temperature optimized for RF and IF applications. It achieves better than range of 40C to +85C. 80 dB SFDR performance at frequencies up to 200 MHz, and 60 44 65 dB beyond 500 MHz, making it an ideal driver for high 65 42 speed 12-bit to 16-bit analog-to-digital converters (ADCs). 70 40 Unlike other wideband differential amplifiers, the AD8352 has buffers that isolate the gain setting resistor (R ) from the signal G 75 38 inputs. As a result, the AD8352 maintains a constant 3 k input 80 36 resistance for gains of 3 dB to 25 dB, easing matching and input drive requirements. The AD8352 has a nominal 100 differential 85 34 output resistance. 90 32 The device is optimized for wideband, low distortion performance 95 30 at frequencies beyond 500 MHz. These attributes, together with its wide gain adjust capability, make this device the amplifier of 100 28 20 40 60 80 100 120 140 160 180 200 220 choice for general-purpose IF and broadband applications FREQUENCY (MHz) where low distortion, noise, and power are critical. It is ideally Figure 2. Third Harmonic Distortion (HD3) and IP3 vs. suited for driving not only ADCs but also mixers, pin diode Frequency, Measured Differentially attenuators, surface acoustic wave (SAW) filters, and multi- element discrete devices. The device is available in a compact Rev. C Document Feedback 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 20062018 Analog Devices, Inc. All rights reserved. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Technical Support www.analog.com Trademarks and registered trademarks are the property of their respective owners. HD3 (dBc) IP3 (dBm) 05728-002 05728-001AD8352 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Gain and Distortion Adjustment (Differential Input) .......... 11 Applications ....................................................................................... 1 Single-Ended Input Operation ................................................. 12 Functional Block Diagram .............................................................. 1 Narrow-Band, Third-Order Intermodulation Cancellation . 13 General Description ......................................................................... 1 High Performance ADC Driving ............................................. 14 Revision History ............................................................................... 2 Layout and Transmission Line Effects ..................................... 15 Specifications ..................................................................................... 3 Evaluation Board ............................................................................ 16 Noise Distortion Specifications .................................................. 4 Evaluation Board Loading Schemes ........................................ 16 Absolute Maximum Ratings ............................................................ 6 Soldering Information ............................................................... 16 ESD Caution .................................................................................. 6 Evaluation Board Schematics ................................................... 17 Pin Configuration and Function Descriptions ............................. 7 Outline Dimensions ....................................................................... 19 Typical Performance Characteristics ............................................. 8 Ordering Guide .......................................................................... 19 Applications Information .............................................................. 11 REVISION HISTORY 4/2018Rev. B to Rev. C 9/2006Rev. 0 to Rev. A Changes to Figure 3 and Table 4 ..................................................... 7 Changes to Absolute Maximum Ratings ........................................ 6 Updated Outline Dimensions ....................................................... 19 Inserted Figure 10, Figure 11, and Figure 13 ................................. 9 Changes to Ordering Guide .......................................................... 19 Inserted Figure 17, Figure 18, and Figure 21 .............................. 10 Changes to Figure 34 ...................................................................... 14 7/2008Rev. A to Rev. B Changes to Table 9 .......................................................................... 16 Changes to Features Section............................................................ 1 Changes to Figure 38 ...................................................................... 18 Changes to Figure 21 ...................................................................... 10 Changes to Ordering Guide .......................................................... 19 Changes to Table 9 .......................................................................... 16 Added Soldering Information Section ......................................... 16 1/2006Revision 0: Initial Version Changes to Figure 38 ...................................................................... 17 Changes to Ordering Guide .......................................................... 19 Rev. C Page 2 of 19