ADF4208 - ADI

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

Part No

ADF4208
Manufacturer

ADI
ChipWorker Part#

CW760508333
Description

Dual, Integer-N 1.1GHz/2GHz PLL
Documentation

Datasheet

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ADF4208 Specifications

Attribute	Attribute Value

Part Number	ADF4208
Manufacturer	ADI
ChipWorker Part#	CW760508333
Documentation	Datasheet
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Product Lifecycle Status	Unknown

Product Description

Product Details
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
### Features and Benefits
2.0 GHz/1.1 GHz
2.7 V to 5.5 V power supply
Selectable charge pump supply (VP) 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

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