ADF4108 - ADI

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

Part No

ADF4108
Manufacturer

ADI
ChipWorker Part#

CW543102233
Description

8GHz integer-N PLL
Documentation

Datasheet

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ADF4108 Specifications

Attribute	Attribute Value

Part Number	ADF4108
Manufacturer	ADI
ChipWorker Part#	CW543102233
Documentation	Datasheet
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Product Lifecycle Status	Recommended for New Designs

Product Description

Product Details
The ADF4108 frequency synthesizer can be used to implement local oscillators in the up-conversion and down-conversion sections of wireless receivers and transmitters. It consists 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 (13-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 (phase-locked loop) can be implemented if the synthesizer is used with an external loop filter and VCO (voltage controlled oscillator). Its very high bandwidth (8GHz) means that frequency doublers or prescalers can be eliminated in many high frequency systems, simplifying system architecture and reducing cost.
**Applications**
Broadband wireless access
Satellite systems
Instrumentation
Wireless LANs
Base stations for wireless radio
### Features and Benefits
8.0 GHz bandwidth
3.2 V to 3.6 V power supply
Separate charge pump supply (VP) allows extended tuning voltage in 3.3 V systems
Programmable, dual-modulus prescaler 8/9, 16/17, 32/33, or 64/65
Programmable charge pump currents
Programmable antibacklash pulse width
3-wire serial interface
Analog and digital lock detect
Hardware and software power-down mode
Loop filter design possible with ADIsimPLL
4 mm × 4 mm, 20-lead chip scale package

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