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ADL5330ACPZ-WP Datasheet(PDF) 1 Page - Analog Devices |
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ADL5330ACPZ-WP Datasheet(HTML) 1 Page - Analog Devices |
1 / 24 page 10 MHz to 3 GHz VGA with 60 dB Gain Control Range ADL5330 Rev. A 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 rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 © 2005 Analog Devices, Inc. All rights reserved. FEATURES Voltage-controlled amplifier/attenuator Operating frequency 10 MHz to 3 GHz Optimized for controlling output power High linearity: OIP3 31 dBm @ 900 MHz Output noise floor: −150 dBm/Hz @ 900 MHz 50 Ω input and output impedances Single-ended or differential operation Wide gain-control range: −34 dB to +22 dB @ 900 MHz Linear-in-dB gain control function, 20 mV/dB Single-supply 4.75 V to 5.25 V APPLICATIONS Transmit and receive power control at RF and IF FUNCTIONAL BLOCK DIAGRAM INLO VPS1 COM1 INHI COM2 OPLO OPHI IPBS GAIN CONTROL BIAS AND VREF GAIN BALUN COM2 RFOUT COM2 VPS2 VPS2 VPS2 COM1 VPS1 VPS2 VPS2 COM2 COM1 OPBS VREF ENBL VPS2 RFIN INPUT GM STAGE O/P (TZ) STAGE Figure 1. GENERAL DESCRIPTION The ADL5330 is a high performance, voltage-controlled variable gain amplifier/attenuator for use in applications with frequencies up to 3 GHz. The balanced structure of the signal path minimizes distortion while it also reduces the risk of spurious feed-forward at low gains and high frequencies caused by parasitic coupling. While operation between a balanced source and load is recommended, a single-sided input is internally converted to differential form. The input impedance is 50 Ω from INHI to INLO. The outputs are usually coupled into a 50 Ω grounded load via a 1:1 balun. A single supply of 4.75 V to 5.25 V is required. The 50 Ω input system converts the applied voltage to a pair of differential currents with high linearity and good common rejection even when driven by a single-sided source. The signal currents are then applied to a proprietary voltage-controlled attenuator providing precise definition of the overall gain under the control of the linear-in-dB interface. The GAIN pin accepts a voltage from 0 V at minimum gain to 1.4 V at full gain with a 20 mV/dB scaling factor. The output of the high accuracy wideband attenuator is applied to a differential transimpedance output stage. The output stage sets the 50 Ω differential output impedances and drives Pin OPHI and Pin OPLO. The ADL5330 has a power-down function. It can be powered down by a Logic LO input on the ENBL pin. The current consumption in power-down mode is 250 μA. The ADL5330 is fabricated on an ADI proprietary high performance, complementary bipolar IC process. The ADL5330 is available in a 24-lead (4 mm × 4 mm), Pb-free LFCSP_VQ package and is specified for operation from ambient temperatures of −40°C to +85°C. An evaluation board is also available. |
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