ADF4154

Features:

RF bandwidth 500 MHz to 4 GHz
2.7 V to 3.3 V power supply
Separate VP allows extended tuning voltage
Programmable dual-modulus prescaler 4/5, 8/9
Programmable charge pump currents
3-wire serial interface
Digital lock detect
Power-down mode
Pin compatible with the ADF4110/ADF4111/ ADF4112/ADF4113, ADF4106 and ADF4153
Programmable modulus on fractional-N synthesizer
Trade-off noise versus spurious performance
Fast-lock mode with built-in timer


Application

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


Pinout




Specifications

V_DD to GND                                                 −0.3 V to +4 V
V_DD to VDD                                              −0.3 V to +0.3 V
V_P to GND                                                −0.3 V to +5.8 V
V_P to VDD                                                −0.3 V to +5.8 V
Digital I/O Voltage to GND               −0.3 V to V_DD + 0.3 V
Analog I/O Voltage to GND              −0.3 V to V_DD + 0.3 V
REFIN, RFIN to GND                         −0.3 V to V_DD + 0.3 V
Operating Temperature Range  
Industrial (B Version)                              −40°C to +85°C
Storage Temperature Range                −65°C to +150°C
Maximum Junction Temperature                             150°C
TSSOP _JA Thermal Impedance                       150.4°C/W
LFCSP _JA Thermal Impedance
(Paddle Soldered)                                              122°C/W 
LFCSP _JA Thermal Impedance
(Paddle Not Soldered)                                       216°C/W
Lead Temperature, Soldering  
Vapor Phase (60 sec)                                            215°C
Infrared                                                                 220°C


Description

The ADF4154 is a fractional-N frequency synthesizer that implements local oscillators in the up conversion and down conversion sections of wireless receivers and transmitters. It consists of a low noise digital phase frequency detector (PFD),  a precision charge pump, and a programmable reference divider. There is a - based fractional interpolator to allow programmable fractional-N division. The INT, FRAC, and MOD registers define an overall N divider (N = (INT + (FRAC/MOD))). In addition, the 4-bit reference counter (R counter) allows selectable REFIN frequencies at the PFD input. A complete phase-locked loop (PLL) can be implemented if the synthesizer is used with an external loop filter and a voltage controlled oscillator (VCO).

A key feature of the ADF4154 is the fast-lock mode with a builtin timer. The user can program a predetermined count-down time value so that the PLL will remain in wide bandwidth mode, instead of having to control this time externally. Control of all on-chip registers is via a simple 3-wire interface. ADF4154 operates with a power supply ranging from 2.7 V to 3.3 V, and can be powered down when not in use.