ADF4252 - ADI

The pictures are for reference only, and the specific specifications can be found in the product manual.

Part No

ADF4252
Manufacturer

ADI
ChipWorker Part#

CW430792993
Description

Lowest Phase Noise PLL Synthesizer using Fractional-N Technology
Documentation

Datasheet

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ADF4252 Specifications

Attribute	Attribute Value

Part Number	ADF4252
Manufacturer	ADI
ChipWorker Part#	CW430792993
Documentation	Datasheet
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Product Lifecycle Status	Active

Product Description

Product Details
The ADF4252 is a dual fractional-N/integer-N frequency synthesizer that can be used to implement local oscillators (LO) in the upconversion and downconversion sections of wireless receivers and transmitters. Both the RF and IF synthesizers consist of a low noise digital phase frequency detector (PFD), a precision charge pump, and a programmable reference divider. The RF synthesizer has a Σ-Δ-based fractional interpolator that allows programmable fractional-N division. The IF synthesizer has programmable integer-N counters. A complete phase-locked loop (PLL) can be implemented if the synthesizer is used with an external loop filter and voltage controlled oscillator (VCO).
Control of all the on-chip registers is via a simple 3-wire interface. The device operates with a power supply ranging from 2.7 V to 3.3 V and can be powered down when not in use.
Applications
Base stations for mobile radio (GSM, PCS, DCS, CDMA, WCDMA)
Wireless handsets (GSM, PCS, DCS, CDMA, WCDMA)
Wireless LANs
Communications test equipment
CATV equipment
### Features and Benefits
3.0 GHz fractional-N/1.2 GHz integer-N
2.7 V to 3.3 V power supply
Separate VP allows extended tuning voltage to 5 V
Programmable dual modulus prescaler
RF: 4/5, 8/9
* IF: 8/9, 16/17, 32/33, 64/65
Programmable charge pump currents
3-wire serial interface
Digital lock detect
Power-down mode
Programmable modulus on fractional-N synthesizer
Trade off noise vs. spurious performance

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