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AD8376 Fiches technique(PDF) 1 Page - Analog Devices |
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AD8376 Fiches technique(HTML) 1 Page - Analog Devices |
1 / 12 page Ultra Low Distortion IF Dual VGA Preliminary Technical Data AD8376 Rev. PrD March 13, 2007 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: 781.326.8703 © 2007 Analog Devices, Inc. All rights reserved. FEATURES Dual Independent Digitally Controlled VGAs -4 to 20dB Gain Range 1 dB Step Size ± 0.2 dB Differential input and output 150 Ω Differential Input Open Collector Differential Output 8.7 dB noise figure @ maximum gain OIP3 of ~50dBm at 140MHz −3 dB bandwidth of 700 MHz Excellent Channel to Channel Isolation Two Parallel 5-bit Control Interfaces Wide input dynamic range Power-down Control Single 5V Supply Operation 32 Lead LFCSP 5 x 5 mm Package APPLICATIONS Differential ADC drivers Main and Diverstiy IF Sampling Receivers High Output Power IF Amplification Multi-channel Receivers Instrumentation GENERAL DESCRIPTION The AD8376 is a dual channel digitally controlled, variable gain wide bandwidth amplifier that provides precise gain control, high IP3 and low noise figure. The excellent distortion performance and high signal bandwidth makes the AD8376 an excellent gain control device for a variety of receiver applications. For wide input dynamic range applications, the AD8376 pro- vides a broad 24 dB gain range with 1 dB resolution. The gain of each channel is adjusted through dedicated 5-pin control interfaces and can be driven using standard TTL levels. The open-collector outputs provide a flexible interface, allowing the overall signal gain to be set by the loading resistance. The AD8376 offers a maximum trans-conductance gain of 67 mΩ-1’s. This results in a signal voltage gain proportional to the load resistance. When driving a 150 Ω differential load, the maximum signal gain will be 20 dB. FUNCTIONAL BLOCK DIAGRAM Figure 1. Using a high speed SiGe process and incorporating proprietary distortion cancellation techniques, the AD8376 achieves 50 dBm output IP3 at 140 MHz. Each channel of the AD8376 can be individually powered on by applying the appropriate logic level to the ENBA and ENBB power enable pins. The quiescent current of the AD8376 is typically 130 mA per channel. When powered down, the AD8376 consumes less than 5mA and offers excellent input to output isolation, lower than -50 dB at 200 MHz. Fabricated on an ADI’s high speed SiGe process, the AD8376 provides precise gain adjustment capabilities with good distortion performance. The AD8376 amplifier comes in a compact, thermally enhanced 5 x 5mm 32-lead LFCSP package and operates over the temperature range of −40°C to +85°C. |
Numéro de pièce similaire - AD8376 |
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Description similaire - AD8376 |
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