Active Receive Mixer, 400 MHz to 1.2 GHz Data Sheet AD8344 FEATURES FUNCTIONAL BLOCK DIAGRAM Broadband RF port: 400 MHz to 1.2 GHz Conversion gain: 4.5 dB 12 11 10 9 Noise figure: 10.5 dB COMM 13 8 COMM BIAS Input IP3: 24 dBm RFCM 14 7 IFOP Input P1dB: 8.5 dBm LO drive: 0 dBm RFIN 15 6 IFOM External control of mixer bias for low power operation VPMX 16 5 COMM Single-ended, 50 RF and LO input ports 1 2 3 4 Single-supply operation: 5 V at 84 mA Power-down mode Exposed paddle LFCSP: 3 mm 3 mm Figure 1. APPLICATIONS Cellular base station receivers ISM receivers Radio links RF Instrumentation GENERAL DESCRIPTION The AD8344 is a high performance, broadband active mixer. It The open-collector differential outputs provide excellent balance is well suited for demanding receive-channel applications that and can be used with a differential filter or IF amplifier, such as require wide bandwidth on all ports and very low intermodulation the AD8369 or AD8351. These outputs may also be converted distortion and noise figure. to a single-ended signal using a matching network or a trans- former (balun). When centered on the VPOS supply voltage, The AD8344 provides a typical conversion gain of 4.5 dB at each of the differential outputs may swing 2.5 V p-p. 890 MHz. The integrated LO driver supports a 50 input impedance with a low LO drive level, helping to minimize The AD8344 is fabricated on an Analog Devices proprietary, external component count. high performance SiGe IC process. The AD8344 is available in a 16-lead LFCSP package. It operates over the 40C to +85C The single-ended 50 broadband RF port allows for easy temperature range. An evaluation board is also available. interfacing to both active devices and passive filters. The RF input accepts input signals as large as 1.7 V p-p or 8.5 dBm (re: 50 ) at P1dB. Rev. A 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 20042018 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. VPLO VPDC LOCM PWDN LOIN EXRB COMM COMM 04826-0-001AD8344 Data Sheet TABLE OF CONTENTS Circuit Description......................................................................... 13 Features .............................................................................................. 1 AC Interfaces ................................................................................... 14 Applications ....................................................................................... 1 IF Port .......................................................................................... 14 Functional Block Diagram .............................................................. 1 LO Considerations ..................................................................... 15 General Description ......................................................................... 1 Bias Resistor Selection ............................................................... 16 Revision History ............................................................................... 2 Conversion Gain and IF Loading ............................................. 16 Specif icat ions ..................................................................................... 3 Low IF Frequency Operation.................................................... 17 AC Performance ............................................................................... 4 Evaluation Board ............................................................................ 18 Absolute Maximum Ratings ............................................................ 5 Outline Dimensions ....................................................................... 20 ESD Caution .................................................................................. 5 Ordering Guide .......................................................................... 20 Pin Configuration and Function Descriptions ............................. 6 Typical Performance Characteristics ............................................. 7 REVISION HISTORY 4/2018Rev. 0 to Rev. A Changes to Figure 2 and Table 4 ..................................................... 6 Updated Outline Dimensions ....................................................... 20 Changes to Ordering Guide .......................................................... 20 6/2004Revision 0: Initial Version Rev. A Page 2 of 20