ADF4208

PRODUCTION

Dual, Integer-N 1.1 GHz / 2.0 GHz PLL

Data Sheet (Rev. A) Product Selection Table

Part Models: 3
1ku List Price: Starting From $2.51

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Overview

2.0 GHz/1.1 GHz
2.7 V to 5.5 V power supply
Selectable charge pump supply (V_P) allows extended tuning voltage in 3 V systems
Selectable charge pump currents
On-chip oscillator circuit
Selectable dual modulus prescaler
- RF2: 32/33 or 64/65
- RF1: 32/33 or 64/65
3-wire serial interface
Power-down mode

The ADF420x family of dual frequency synthesizers are used to implement local oscillators in the upconversion and downconversion sections of wireless receivers and transmitters. Each synthesizer consists of a low noise, digital, phase frequency detector (PFD); a precision charge pump; a programmable reference divider; programmable A and B counters; and a dual modulus prescaler (P/P + 1). The A (6-bit) and B (11-bit) counters, in conjunction with the dual modulus prescaler (P/P + 1), implement an N divider (N = BP + A). In addition, the 14-bit reference counter (R counter) allows selectable REFIN frequencies at the PFD input. The on-chip oscillator circuitry allows the reference input to be derived from crystal oscillators.

A complete phase-locked loop (PLL) can be implemented if the synthesizers are used with an external loop filter and voltage controlled oscillators (VCOs).

Control of all the on-chip registers is via a simple 3-wire interface. The devices operate with a power supply ranging from 2.7 V to 5.5 V and can be powered down when not in use.

Applications

Wireless handsets (GSM, PCS, DCS, CDMA, WCDMA)
Base stations for wireless radio (GSM, PCS, DCS, CDMA, WCDMA)
Wireless LANS Communications test equipment
CATV equipment

Part Models: 3
1ku List Price: Starting From $2.51

Documentation

Data Sheet 1

ADF4206/ADF4208: Dual RF PLL Frequency Synthesizers Data Sheet (Rev.A) 03/01/2001

Application Note 2

AN-30: Ask the Applications Engineer - PLL Synthesizers 12/06/2004

AN-873: Lock Detect on the ADF4xxx Family of PLL Synthesizers 03/13/2025

Frequently Asked Question 1

FAQ 09/05/2025

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
ADF4208BRUZ	20-Lead TSSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADF4208BRUZ-R7	20-Lead TSSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
ADF4208BRUZ-RL	20-Lead TSSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Feb 11, 2011 - 10_0005 Halogen Free Material Change for TSSOP Products Assembled at Amkor
		PCN10_0005_Form Material_Report Reliability Report
ADF4208BRUZ	PRODUCTION
ADF4208BRUZ-R7	PRODUCTION
ADF4208BRUZ-RL	PRODUCTION
Oct 28, 2009 - 08_0008 Qualification of 8" 0.6um BiCMOS wafer fab process at Analog Devices, Limerick, Ireland.
		Material_Report PCN08_0008_Form
ADF4208BRUZ	PRODUCTION
ADF4208BRUZ-R7	PRODUCTION
ADF4208BRUZ-RL	PRODUCTION

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

Software Resources

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Hardware Ecosystem

Parts	Product Life Cycle	Description
Frequency Dividers & Multipliers 1
ADF5001	PRODUCTION	4 GHz TO 18 GHz Divide-by-4 Prescaler
LDO Linear Regulators 3
ADP150	PRODUCTION	Ultralow Noise, 150 mA CMOS Linear Regulator
ADP3334	NOT RECOMMENDED FOR NEW DESIGNS	High Accuracy Low I_Q, 500 mA anyCAP^® Adjustable Low Dropout Regulator
ADP151	PRODUCTION	Ultralow Noise, 200 mA, CMOS Linear Regulator

Modulators & Demodulators 2
ADL5375	PRODUCTION	400 MHz TO 6 GHz Broadband Quadrature Modulator
ADL5380	RECOMMENDED FOR NEW DESIGNS	400 MHz TO 6000 MHz Quadrature Demodulator
Operational Amplifiers (Op Amps) 1
OP184	PRODUCTION	Single-Supply Rail-to-Rail Input/Output Operational Amplifier
RF Mixers 2
ADL5801	RECOMMENDED FOR NEW DESIGNS	High IP3, 10 MHz TO 6 GHz, Active Mixer
ADL5802	RECOMMENDED FOR NEW DESIGNS	Dual Channel High IP3 100 MHz TO 6 GHz Active Mixer
Switching Regulators & Controllers 1
ADP1613	PRODUCTION	650 kHz /1.3 MHz Step-Up PWM DC-to-DC Switching Converter with 2.0 A Current Limit

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.