ADF4212| Datasheet

ADF4212, ADF4213, ADF4213

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Dual RF/IF PLL Frequency Synthesizers ADF4210/ADF4211/ADF4212/ADF4213
GENERAL DESCRIPTION

FEATURES ADF4210: 550 MHz/1.2 GHz ADF4211: 550 MHz/2.0 GHz ADF4212: 1.0 GHz/2.7 GHz ADF4213: 1.0 GHz/3 GHz 2.7 V to 5.5 V Power Supply Separate Charge Pump Supply (VP) Allows Extended Tuning Voltage in 3 V Systems Programmable Dual Modulus Prescaler RF and IF: 8/9, 16/17, 32/33, 64/65 Programmable Charge Pump Currents 3-Wire Serial Interface Analog and Digital Lock Detect Fastlock Mode Power-Down Mode

The ADF4210/ADF4211/ADF4212/ADF4213 is a dual frequency synthesizer that can be used to implement local oscillators (LO) in the upconversion and downconversion sections of wireless receivers and transmitters. They can provide the LO for both the RF and IF sections. They consist of a low-noise digital PFD (Phase Frequency Detector), 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 (12-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. A complete PLL (PhaseLocked Loop) can be implemented if the synthesizer is used with an external loop filter and VCO (Voltage Controlled Oscillators).

Control of all the on-chip registers is via a simple 3-wire interface. APPLICATIONS The devices operate with a power supply ranging from 2.7 V to Base Stations for Wireless Radio (GSM, PCS, DCS, 5 V and can be powered down when not in use. CDMA, WCDMA) Wireless Handsets (GSM, PCS, DCS, CDMA, WCDMA) Wireless LANS Communications Test Equipment CATV Equipment FUNCTIONAL BLOCK DIAGRAM
VDD1 VDD2 VP1 VP2 RSET

12-BIT IF B-COUNTER IFIN IF PRESCALER 8-BIT IF A-COUNTER

PHASE COMPARATOR

REFERENCE

CHARGE PUMP IF CURRENT SETTING IFCP3 IFCP2 IFCP1

CPIF

REFIN

OSCILLATOR 14-BIT IF R-COUNTER

IF LOCK DETECT

CLOCK DATA LE

24-BIT DATA SDOUT REGISTER 14-BIT RF R-COUNTER

OUTPUT MUX

MUXOUT

RFCP3 RFCP2 RFCP1 RF LOCK DETECT IF CURRENT SETTING CHARGE PUMP PHASE COMPARATOR REFERENCE RSET FLO SWITCH FLO

12-BIT RF B-COUNTER RFIN RF PRESCALER 6-BIT RF A-COUNTER

CPRF

ADF4210/ADF4211/ ADF4212/ADF4213
AGNDIF

DGNDRF

AGNDRF

DGNDIF

REV. A
Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 www.analog.com Fax: 781/326-8703 Analog Devices, Inc., 2001