ADRF6720:  Wideband (700 MHz to 3 GHz) Quadrature Modulator with Integrated PLL/VCOs and 0.5 V Input Bias

Product Details

Product Status:Recommended for New Designs

The ADRF6720 is a wideband quadrature modulator with an integrated synthesizer ideally suited for 3G and 4G communication systems. The ADRF6720 consists of a high linearity broadband modulator, an integrated fractional-N phase-locked loop (PLL), and four low phase noise multicore voltage controlled oscillators (VCOs).

The ADRF6720 local oscillator (LO) signal can be generated internally via the on-chip integer-N and fractional-N synthesizers, or externally via a high frequency, low phase noise LO signal. The internal integrated synthesizer enables LO coverage from 356.25 MHz to 2855 MHz using the multicore VCOs. In the case of internal LO generation or external LO input, quadrature signals are generated with a divide-by-2 phase splitter. When the ADRF6720 is operated with an external 1 × LO input, a polyphase filter generates the quadrature inputs to the mixer.

The ADRF6720 offers digital programmability for carrier feedthrough optimization, sideband suppression, HD3/IP3 optimization, and high-side or low-side LO injection.

The ADRF6720 is fabricated using an advanced silicon-germanium BiCMOS process. It is available in a 40-lead, RoHS-compliant, 6 mm × 6 mm LFCSP package with an exposed pad. Performance is specified over the −40°C to +85°C temperature range.

Applications

  • 2G/3G/4G/LTE broadband communication systems
  • Microwave point-to-point radios
  • Satellite modems
  • Military/aerospace
  • Instrumentation

FEATURES and BENEFITS

  • I/Q modulator with integrated fractional-N PLL
  • RF output frequency range: 700 MHz to 3000 MHz
  • Internal LO frequency range: 356.25 MHz to 2855 MHz
  • Output P1dB: 12.2 dBm at 2140 MHz
  • Output IP3: 32.6 dBm at 2140 MHz
  • Carrier feedthrough: −40.3 dBm at 2140 MHz
  • Sideband suppression: −37.6 dBc at 2140 MHz
  • Noise floor: −157.9 dBm/Hz at 2140 MHz
  • Baseband 1 dB modulation bandwidth: >1000 MHz
  • Baseband input bias level: 0.5 V
  • Power supply: 3.3 V/425 mA
  • Integrated RF tunable balun allowing single-ended RF output
  • Multicore integrated VCO
  • HD3/IP3 optimization
  • Sideband suppression and carrier feedthrough optimization
  • High-side/low-side LO injection
  • Programmable via 3-wire serial port interface (SPI)
  • 40-lead 6 mm × 6 mm LFCSP

Functional Block Diagram for ADRF6720

Design Tools,Models,Drivers & Software

Title Content Type File Type
ADRF6720 S-Parameters  (zip, 202 kB) S-Parameters ZIP
ADRF6720 Evaluation Board Software  (zip, 1108 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.

Product Recommendations & Reference Designs

Companion Products

Suggested Companion Products


Recommended RF/IF Driver Amplifiers for the ADRF6720
  • For broadband applications, we recommend the ADL5324.
Recommended Differential Dual Baseband TxDACs for the ADRF6720
  • For generating differential I and Q currents up to 125 MSPS, we recommend the AD9117.
  • For even lower power requirements up to 125 MSPS, we recommend the AD9717.
  • For higher bandwidths using data rates up to 250 MSPS, with low noise and IMD, we recommend the AD9747.
  • For higher bandwidths using data rates up to 250 MSPS where interpolation is required, we recommend the AD9125.
  • For direct conversion transmit applications up to 500 MSPS, we recommend the AD9783.
  • For direct conversion transmit applications up to 500 MSPS where interpolation is required, we recommend the AD9122.
  • For direct conversion transmit applications above 1000 MSPS, with ultralow noise and IMD, we recommend the AD9142A.
Recommended Power Solutions
  • For selecting voltage regulator products, use ADIsimPower.

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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.

ADRF6720 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
ADRF6720-EVALZ Status: Production Evaluation Board $200.00 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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