ADRF6820

Obsolete

ADRF6820

695 MHz to 2700 MHz Quadrature Demodulator with Integrated Fractional-N PLL and VCO

Obsolete

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Features

I/Q demodulator with integrated fractional-N PLL
RF input frequency range: 695 MHz to 2700 MHz
Internal LO frequency range: 356.25 MHz to 2850 MHz
Input P1dB: 14.5 dBm at 1900 MHz RF
Input IP3: 35 dBm at 1900 MHz RF
Programmable HD3/IP3 trim
Single pole, double throw (SPDT) RF input switch
RF digital step attenuation range: 0 dB to 15 dB

Integrated RF tunable balun for single-ended 50 Ω input
Multicore integrated VCO
Demodulated 1 dB bandwidth: 600 MHz
Demodulated 3 dB bandwidth: 1400 MHz
4 selectable baseband gain and bandwidth modes
Digital programmable LO phase offset and dc nulling
Programmable via 3-wire serial port interface (SPI)
40-lead, 6 mm × 6 mm LFCSP

Additional Details

The ADRF6820 is a highly integrated demodulator and synthesizer ideally suited for next generation communication systems. The feature rich device consists of a high linearity broadband I/Q demodulator, an integrated fractional-N phase-locked loop (PLL), and a low phase noise multicore, voltage controlled oscillator (VCO). The ADRF6820 also integrates a 2:1 RF switch, an on-chip tunable RF balun, a programmable RF attenuator, and two low dropout (LDO) regulators. This highly integrated device fits within a small 6 mm × 6 mm footprint.

The high isolation 2:1 RF switch and on-chip tunable RF balun enable the ADRF6820 to support two single-ended, 50 Ω terminated RF inputs. A programmable attenuator ensures an optimal differential RF input level to the high linearity demodulator core. The integrated attenuator offers an attenuation range of 0 dB to 15 dB with a step size of 1 dB.

The ADRF6820 offers two alternatives for generating the differential local oscillator (LO) input signal: externally via a high frequency, low phase noise LO signal or internally via the on-chip fractional-N synthesizer. The integrated synthesizer enables continuous LO coverage from 356.25 MHz to 2850 MHz. The PLL reference input can support a wide frequency range because the divide or multiplication blocks can increase or decrease the reference frequency to the desired value before it is passed to the phase frequency detector (PFD).

When selected, the output of the internal fractional-N synthesizer is applied to a divide-by-2 quadrature phase splitter. From the external LO path, a 1× LO signal can be applied to the built-in polyphase filter, or a 2× LO signal can be used with the divide-by-2 quadrature phase splitter to generate the quadrature LO inputs to the mixers.

The ADRF6820 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 paddle. Performance is specified over the −40°C to +85°C temperature range.

APPLICATIONS

Cellular W-CDMA/GSM/LTE
Digital predistortion (DPD) receivers
Microwave point-to-point radios

View All Documentation

Ask a Question

Submit your question below and we will return the best answer from ADI’s knowledge database:

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Support

Analog Devices Support Portal is a one-stop shop to answer all your ADI questions.

Visit the ADI Support Page

Ask the ADI community for help.

Ask the EngineerZone Community

FAQs

Sales & Ordering FAQs

Part Models 1

1ku List Price

price unavailable

Technical Documents 3

ADRF6820: 695 MHz to 2700 MHz, Quadrature Demodulator with Integrated Fractional-N PLL and VCO Data Sheet (Rev.C) 12/20/2013

UG-652: Evaluating the ADRF6820—a 695 MHz to 2700 MHz Quadrature Demodulator with Integrated Fractional-N PLL and VCO 02/19/2014

AN-1390: Manual Band Selection for PLL Lock Time Reduction (Rev.0) 02/04/2016

Reference Materials 2

RF, Microwave, and Millimeter Wave Product Selection Guide 07/13/2018

Power Management for Integrated RF ICs 01/01/2015

Design Resources 1

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. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
ADRF6820ACPZ-R7	40-Lead LFCSP (6mm x 6mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys

ADRF6820ACPZ-R7
Pin/Package Drawing
40-Lead LFCSP (6mm x 6mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

PCN/PDN Information

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Part Models

Product Lifecycle

PCN

Aug 1, 2016

- 16_0035

Assembly Relocation of Select LFCSP, Mini-LFCSP and LFCSP Side Solderable Products to STATS ChipPAC China Jiangyin

ADRF6820ACPZ-R7

Obsolete

pdf

PCN16_0035_Form

xls

Material_Report

pdf

Qualification Results Summary

pdf

Qualification Results Summary

pdf

Qualification Results Summary

Jun 15, 2014

- 14_0103

Assembly Transfer of ADRF6820 in 6x6 mm LFCSP Products to STATS ChipPAC China

ADRF6820ACPZ-R7

Obsolete

pdf

PCN14_0103_Form

xls

Material_Report

Detailed Change Description

pdf

Qualification Results Summary

Apr 1, 2014

- 14_0092

ADRF6820 Data Sheet Revision

ADRF6820ACPZ-R7

Obsolete

pdf

PCN14_0092_Form

xls

Material_Report

pdf

Datasheet Specification Comparison

Nov 12, 2013

- 13_0233

Assembly Transfer of Select 6x6 and 7x7mm LFCSP Products to STATS ChipPAC China.

ADRF6820ACPZ-R7

Obsolete

pdf

PCN13_0233_Form

xls

Material_Report

Detailed Change Description

pdf

Qualification Plan Summary

Apr 20, 2020

- 20_0020

Obsolescence of Select Material Numbers

ADRF6820ACPZ-R7

Obsolete

pdf

PDN20_0020_Form

xls

Material_Report

Filter by Model

Part Models

Product Lifecycle

PCN

Aug 1, 2016

- 16_0035

Assembly Relocation of Select LFCSP, Mini-LFCSP and LFCSP Side Solderable Products to STATS ChipPAC China Jiangyin

ADRF6820ACPZ-R7

Obsolete

pdf

PCN16_0035_Form

xls

Material_Report

pdf

Qualification Results Summary

pdf

Qualification Results Summary

pdf

Qualification Results Summary

Jun 15, 2014

- 14_0103

Assembly Transfer of ADRF6820 in 6x6 mm LFCSP Products to STATS ChipPAC China

ADRF6820ACPZ-R7

Obsolete

pdf

PCN14_0103_Form

xls

Material_Report

Detailed Change Description

pdf

Qualification Results Summary

Apr 1, 2014

- 14_0092

ADRF6820 Data Sheet Revision

ADRF6820ACPZ-R7

Obsolete

pdf

PCN14_0092_Form

xls

Material_Report

pdf

Datasheet Specification Comparison

Nov 12, 2013

- 13_0233

Assembly Transfer of Select 6x6 and 7x7mm LFCSP Products to STATS ChipPAC China.

ADRF6820ACPZ-R7

Obsolete

pdf

PCN13_0233_Form

xls

Material_Report

Detailed Change Description

pdf

Qualification Plan Summary

Apr 20, 2020

- 20_0020

Obsolescence of Select Material Numbers

ADRF6820ACPZ-R7

Obsolete

pdf

PDN20_0020_Form

xls

Material_Report

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Evaluation Software 1

zip ADRF6820 Evaluation Board Software

EVAL-ADRF6820

ADRF6820 Evaluation Board

EVAL-ADRF6820

ADRF6820 Evaluation Board

Buy Now View Details

Product Detail

ADRF6820-EVALZ is a full featured evaluation board allowing all the necessary support circuitry to operate the ADRF6820 in its various configurations. The evaluation board includes an on-board USB to allow for register programming via the SPI port of the ADRF6820. For ease of evaluation, a footprint for an optional crystal oscillator for the PLL reference input is integrated on the board, therefore not requiring an additional signal source. The I and Q outputs of the demodulator can be outputted single-ended or differentially where the necessary SMA connectors and balun are populated. Finally, the ADRF6820-EVALZ is populated with multiple power management options including LDOs, switching regulators, and the option to bypass the power management circuitry and to directly source the ADRF6820 with external power supplies. The ADRF6820-EVALZ is a 6 layer, FR-4 based evaluation board, and with the power management option only a +6V source is required. The required software that complements the evaluation board can be found on the ADI webpage.

Resources

pdf

UG-652: Evaluating the ADRF6820—a 695 MHz to 2700 MHz Quadrature Demodulator with Integrated Fractional-N PLL and VCO

941 kB

ZIP

ADRF6820 Gerber Files

526.56 K

Software

ZIP

ADRF6820 Evaluation Board Software

1701 kB

EVAL-ADRF6820

ADRF6820 Evaluation Board

S-Parameter 1

Simulation Model

S-Parameter

ADRF6820 S-Parameters

2413 kBB

ADIsimRF

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