Overview

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 VCOs
  • 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

Product Details

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

Product Lifecycle icon-not-recommended Not Recommended for New Designs

This designates products ADI does not recommend broadly for new designs.

Evaluation Kits (1)

Software & Systems Requirements

Tools & Simulations

S-Parameters

Design Tools

ADIsimRF

ADIsimRF is an easy-to-use RF signal chain calculator. Cascaded gain, noise, distortion and power consumption can be calculated, plotted and exported for signal chains with up to 50 stages. ADIsimRF also includes an extensive data base of device models for ADI’s RF and mixed signal components.

Reference Designs (1)

Product Recommendations

ADRF6720 Companion Parts

Recommended Differential Dual Baseband TxDACs

  • For even lower power requirements up to 125 MSPS: AD9717.
  • For direct conversion transmit applications up to 500 MSPS where interpolation is required: AD9122.
  • For direct conversion transmit applications up to 500 MSPS: AD9783.
  • For direct conversion transmit applications above 1000 MSPS, with ultralow noise and IMD: AD9142A.
  • For higher bandwidths using data rates up to 250 MSPS, with low noise and IMD: AD9747.
  • For generating differential I and Q currents up to 125 MSPS: AD9117.
  • For higher bandwidths using data rates up to 250 MSPS where interpolation is required: AD9125.

Recommended RF/IF Driver Amplifiers

  • For broadband applications: ADL5324.

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

PCN-PDN Information

Discussions

adrf6720 Discussions

RE: ADRF6720-27 carrier frequency stability
3 week(s) ago in RF and Microwave
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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.