ADL5331ACPZ-R7 Analog Devices

1 MHz to 1.2 GHz VGA with 30 dB Gain Control Range Data Sheet ADL5331 FEATURES FUNCTIONAL BLOCK DIAGRAM Voltage-controlled amplifier/attenuator GAIN ENBL VPS2 VPS2 VPS2 VPS2 Operating frequency: 1 MHz to 1.2 GHz VPS1 VPS2 Optimized for controlling output power ADL5331 GAIN High linearity: OIP3 47 dBm 100 MHz CONTROL COM1 COM2 Output noise floor: 149 dBm/Hz maximum gain Input impedance: 50 INHI OPHI INPUT OUTPUT Output impedance: 20 RFIN GM (TZ) RFOUT STAGE STAGE Wide gain-control range: 30 dB INLO OPLO Linear-in-dB gain control function: 40 mV/dB COM1 COM2 Single-supply voltage: 4.75 V to 5.25 V BIAS AND VREF VPS1 VPS2 APPLICATIONS NC IPBS OPBS COM2 COM2 COM2 Transmit and receive power control at RF and IF CATV distribution Figure 1. GENERAL DESCRIPTION The ADL5331 is a high performance, voltage-controlled The output of the high accuracy wideband attenuator is applied variable gain amplifier/attenuator for use in applications with to a differential transimpedance output stage. The output stage frequencies up to 1.2 GHz. The balanced structure of the signal provides a differential output at OPHI and OPLO, which must be path maximizes signal swing, eliminates common-mode noise pulled up to the supply with RF chokes or a center-tapped balun. and minimizes distortion while it also reduces the risk of spu- The ADL5331 consumes 240 mA of current including the out- rious feed-forward at low gains and high frequencies caused by put pins and operates off a single supply ranging from 4.75 V parasitic coupling. to 5.25 V. A power-down function is provided by applying a The 50 differential input system converts the applied logic low input on the ENBL pin. The current consumption in differential voltage at INHI and INLO to a pair of differential power-down mode is 250 A. currents with high linearity and good common-mode rejection. The ADL5331 is fabricated on an Analog Devices, Inc., pro- The signal currents are then applied to a proprietary voltage- prietary high performance, complementary bipolar IC process. controlled attenuator providing precise definition of the overall The ADL5331 is available in a 24-lead (4 mm 4 mm), Pb-free gain under the control of the linear-in-dB interface. The GAIN LFCSP package and is specified for operation from ambient pin accepts a voltage from 0 V at a minimum gain to 1.4 V at a temperatures of 40C to +85C. An evaluation board is also full gain with a 40 mV/dB scaling factor over most of the range. available. 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 20092017 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. CONTINUOUSLY VARIABLE ATTENUATOR 07593-001ADL5331 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Theory of Operation .........................................................................8 Applications ....................................................................................... 1 Applications Information .................................................................9 Functional Block Diagram .............................................................. 1 Basic Connections .........................................................................9 General Description ......................................................................... 1 Gain Control Input..................................................................... 10 Revision History ............................................................................... 2 CMTS Transmit Application .................................................... 12 Specifications ..................................................................................... 3 Interfacing to an IQ Modulator ................................................ 13 Absolute Maximum Ratings ............................................................ 4 Soldering Information ............................................................... 13 ESD Caution .................................................................................. 4 Evaluation Board Schematic ......................................................... 14 Pin Configuration and Function Descriptions ............................. 5 Outline Dimensions ....................................................................... 15 Typical Performance Characteristics ............................................. 6 Ordering Guide .......................................................................... 15 REVISION HISTORY 10/2017Rev. 0 to Rev. A Changed CP-24-2 to CP-24-14 .................................... Throughout Change to General Description ...................................................... 1 Change to Figure 2 and Table 3 ...................................................... 5 Updated Outline Dimensions ....................................................... 15 Changes to Ordering Guide .......................................................... 15 5/2009Revision 0: Initial Version Rev. A Page 2 of 15