ADRF6806

Obsolete

50 MHz to 525 MHz Quadrature Demodulator with Fractional-N PLL and VCO

Data Sheet (Rev. B) Product Selection Table

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Overview

IQ demodulator with integrated fractional-N PLL
LO frequency range: 50 MHz to 525 MHz
Quadrature demodulation accuracy:
Phase accuracy: <0.5°
Amplitude accuracy: <0.1 dB
Baseband demodulation: 135 MHz, 3 dB bandwidth
SPI serial interface for PLL programming

For the following specifications
(LPEN = 0)/(LPEN = 1):
Input P1dB: 12.2 dBm/10.6 dBm
Input IP3: 28.5 dBm/25.2 dBm
Noise figure (DSB): 12.2/11.4
Voltage conversion gain: 1 dB/4.2 dB
40-lead, 6 mm × 6 mm LFCSP

The ADRF6806 is a high dynamic range IQ demodulator with integrated PLL and VCO. The fractional-N PLL/synthesizer generates a frequency in the range of 2.8 GHz to 4.2 GHz. A programmable quadrature divider (divide ratio = 4 to 80) divides the output frequency of the VCO down to the required local oscillator (LO) frequency to drive the mixers in quadrature. Additionally, an output divider (divide ratio = 4 to 8) generates a divided-down VCO signal for external use.

The PLL reference input is supported from 10 MHz to 160 MHz. The phase detector output controls a charge pump whose output is integrated in an off-chip loop filter. The loop filter output is then applied to an integrated VCO.

The IQ demodulator mixes the differential RF input with the complex LO derived from the quadrature divider. The differential I and Q output paths have excellent quadrature accuracy and can handle baseband signaling or complex IF up to 120 MHz.

A reduced power mode of operation is also provided by programming the serial interface registers to reduce current consumption, with slightly degraded input linearity and output current drive.

The ADRF6806 is fabricated using an advanced silicon-germanium BiCMOS process. It is available in a 40-lead, exposed-paddle, RoHS-compliant, 6 mm × 6 mm LFCSP package. Performance is specified over the −40°C to +85°C temperature range.

APPLICATIONS

QAM/QPSK RF/IF demodulators
Cellular W-CDMA/CDMA/CDMA2000
Microwave point-to-(multi)point radios
Broadband wireless and WiMAX

Documentation

Data Sheet 1

ADRF6806: 50 MHz to 525 MHz Quadrature Demodulator with Fractional-N PLL and VCO Data Sheet (Rev.B) 06/08/2011

This is the most up-to-date revision of the Data Sheet.

Software Resources

Evaluation Software 3

Windows 7 Drivers for the SPI Software

Windows 7 Drivers for the SPI Software (Rev. )

ADRF6806 Evaluation Board Software and Documentation

ADRF6806 Evaluation Board Software and Documentation (Rev. )

ADRF6806 Evaluation Board Software (Adapter board with USB controlled Cypress Microcontroller)

ADRF6806 Evaluation Board Software (Adapter board with USB controlled Cypress Microcontroller) (Rev. )

Can't find the software or driver you need?

Hardware Ecosystem

Parts	Product Life Cycle	Description
Analog to Digital Converters (ADCs) 7
AD9269	RECOMMENDED FOR NEW DESIGNS	16-Bit, 20 MSPS/40 MSPS/65 MSPS/80 MSPS, 1.8 V Dual Analog-to-Digital Converter
AD9262	NOT RECOMMENDED FOR NEW DESIGNS	16-Bit, 2.5 MHz/5 MHz/10 MHz, 30 MSPS to 160 MSPS Dual Continuous Time Sigma-Delta ADC
AD9268	PRODUCTION	16-Bit, 125 MSPS/105 MSPS/80 MSPS, 1.8 V Dual Analog-to-Digital Converter
AD9650	RECOMMENDED FOR NEW DESIGNS	16-Bit, 25 MSPS/65 MSPS/80 MSPS/105 MSPS, 1.8 V Dual Analog-to-Digital Converter (ADC)

AD9231	PRODUCTION	12-Bit, 20 MSPS/40 MSPS/65 MSPS/80 MSPS, 1.8 V Dual Analog-to-Digital Converter
AD9258	PRODUCTION	14-Bit, 125 MSPS, 1.8 V Dual Analog-to-Digital Converter (ADC)
AD9251	PRODUCTION	14-Bit, 20 MSPS/40 MSPS/65 MSPS/80 MSPS, 1.8 V Dual Analog-to-Digital Converter
Differential Amplifiers 7
AD8366	RECOMMENDED FOR NEW DESIGNS	DC to 600 MHz, Dual-Digital Variable Gain Amplifiers
ADL5562	RECOMMENDED FOR NEW DESIGNS	3.3 GHz Ultralow Distortion RF/IF Differential Amplifier
ADL5565	RECOMMENDED FOR NEW DESIGNS	6 GHz Ultrahigh Dynamic Range Differential Amplifier
ADA4930-1	RECOMMENDED FOR NEW DESIGNS	Ultralow Noise Drivers for Low Voltage ADCs
ADA4930-2	RECOMMENDED FOR NEW DESIGNS	Ultralow Noise Drivers for Low Voltage ADCs
ADA4950-1	RECOMMENDED FOR NEW DESIGNS	Low Power Selectable Gain Differential ADC Driver, G = 1, 2, 3
ADA4950-2	RECOMMENDED FOR NEW DESIGNS	Low Power Selectable Gain Differential ADC Driver, G = 1, 2, 3
Variable Gain Amplifiers (VGA) 2
ADRF6510	Obsolete	30 MHz Dual Programmable Filters and Variable Gain Amplifiers
ADRF6516	Obsolete	31 MHz, Dual Programmable Filters and Variable Gain Amplifiers

Tools & Simulations

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.

Open Tool

ADIsimPLL™

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.

Open Tool

Evaluation Kits

ADRF6806 Evaluation Board

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Product Details

The ADRF6806-EVALZ is a full featured evaluation board designed to allow the user to easily evaluate all features of the ADRF6806. The evaluation board provides a USB interface for easy VCO frequency programming. RF input and baseband output SMA connections with single ended setups are featured. There is an option of fully differential baseband signaling on the output at the card edge if user desires. Access to the +3.3 V/209 mA supply and +5 V/86 mA supply is achieved with clip leads to the VCC2 and GND2 testpoints and the VCC and GND testpoint respectively; the supplies have a range of +3.135 V to +3.465 V and +4.75 V to +5.25 V, respectively. The ADRF6806-EVALZ board is a 4 layer board made of Rogers material. Setting the VCO frequency (and other functions) is achieved via the SPI port which can be programmed via the ADRF6806 USB software provided on the ADI webpage.