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ADRF6516:  31 MHz, Dual Programmable Filters and Variable Gain Amplifiers

Product Details

Product Status:Recommended for New Designs

The ADRF6516 is a matched pair of fully differential, low noise and low distortion programmable filters and variable gain amplifiers (VGAs). Each channel is capable of rejecting large out-of-band interferers while reliably boosting the desired signal, thus reducing the bandwidth and resolution requirements on the analog-to-digital converters (ADCs). The excellent matching between channels and their high spurious-free dynamic range over all gain and bandwidth settings make the ADRF6516 ideal for quadrature-based (IQ) communication systems with dense constellations, multiple carriers, and nearby interferers.

The filters provide a six-pole Butterworth response with 1 dB corner frequencies programmable through the SPI port from 1 MHz to 31 MHz in 1 MHz steps. The preamplifier that precedes the filters offers a SPI-programmable option of either 3 dB or 6 dB of gain. The preamplifier sets a differential input impedance of 1600 Ω and has a common-mode voltage that defaults to VPS/2 but can be driven from 1.1 V to 1.8 V.

The variable gain amplifiers that follow the filters provide 50 dB of continuous gain control with a slope of 15.5 mV/dB. Their maximum gains can be programmed to various values through the SPI. The output buffers provide a differential output impedance of 30 Ω and are capable of driving 2 V p-p into 1 kΩ loads. The output common-mode voltage defaults to VPS/2, but it can be adjusted down to 700 mV by driving the high impedance VOCM pin. Independent, built-in dc offset compensation loops can be disabled if fully dc-coupled operation is desired. The high-pass corner frequency is defined by external capacitors on the OFS1 and OFS2 pins and the VGA gain.

The ADRF6516 operates from a 3.15 V to 3.45 V supply and consumes a maximum supply current of 360 mA when programmed to the highest bandwidth setting. When disabled, it consumes <9 mA. The ADRF6516 is fabricated in an advanced silicon-germanium BiCMOS process and is available in a 32-lead, exposed paddle LFCSP. Performance is specified over the −40°C to +85°C temperature range.

Applications

  • Baseband I/Q receivers
  • Diversity receivers
  • ADC drivers
  • Point-to-point and point-to-multipoint radio
  • Instrumentation
  • Medical

FEATURES and BENEFITS

  • Matched pair of programmable filters and VGAs
  • Continuous gain control range: 50 dB
  • Digital gain control: 15 dB
  • 6-pole Butterworth filter: 1 MHz to 31 MHz in 1 MHz steps, 1 dB corner frequency
  • Preamplifier and postamplifier gain steps
  • IMD3: >65 dBc for 1.5 V p-p composite output
  • HD2, HD3: >65 dBc for 1.5 V p-p output
  • Differential input and output
  • Flexible output and input common-mode ranges
  • Optional dc offset compensation loop
  • SPI programmable filter corners and gain steps
  • Power-down feature
  • Single 3.3 V supply operation

Functional Block Diagram for ADRF6516

Documentation

Title Content Type File Type
ADRF6516: 31 MHz, Dual Programmable Filters and Variable Gain Amplifiers Data Sheet (Rev B, 02/2012) (PDF, 1065 kB) Data Sheets PDF
RF Source Booklet  (PDF, 4353 kB)
RF IC Product Overview - Version P (02/2014)
Overview PDF
Glossary of EE Terms Glossary HTML

Design Tools,Models,Drivers & Software

Title Content Type File Type
ADIsimRF
ADI’s ADIsimRF design tool provides calculations for the most important parameters within the RF signal chain, including cascaded gain, noise figure, IP3, P1dB, and total power consumption.
ADIsim Design/Simulation Tools HTML
ADIsimPLL™- Version 3.60.10
ADIsimPLL enables the rapid and reliable evaluation of new high performance PLL products from ADI. It is the most comprehensive PLL Synthesizer design and simulation tool available today. Simulations performed include all key non-linear effects that are significant in affecting PLL performance. ADIsimPLL removes at least one iteration from the design process, thereby speeding the design- to-market.
ADIsim Design/Simulation Tools HTML
Windows 7 Drivers for the SPI Software  (zip, 724 kB) Evaluation Software ZIP
ADRF6516 Evaluation Board Software  (zip, 431 kB) Evaluation Software ZIP

Evaluation Kits & Symbols & Footprints

Evaluation Boards & KitsView the Evaluation Boards and Kits page for documentation and purchasing

Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

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Price, packaging, availability

Price Table Help

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

ADRF6516 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
ADRF6516-EVALZ Status: Production Evaluation Board $150.00 Yes -

Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.

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