ADF4108BCPZ

Overview

The ADF4108BCPZ is an Integer-N PLL frequency synthesizer manufactured by Analog Devices Inc. It operates within a supply voltage range of 3.2 V to 3.6 V and supports RF input frequencies from 1 GHz to 8 GHz. The device features a programmable dual-modulus prescaler with options for 8/9, 16/17, 32/33, or 64/65 division ratios. It includes a low-noise digital phase-frequency detector, a precision charge pump with programmable currents, and a 14-bit reference counter. The component is housed in a 4 mm × 4 mm, 20-lead LFCSP package.

Feature Summary

• Supports RF input frequencies up to 8.0 GHz with a maximum output frequency of 325 MHz (for P=16).
• Features a separate charge pump supply pin (VP) allowing extended tuning voltages up to 5.5 V in 3.3 V systems.
• Includes a 3-wire serial interface for programming the R, A, and B counters as well as function controls.
• Provides both analog and digital lock detect outputs accessible via the MUXOUT pin.

Applications

• Broadband wireless access systems
• Satellite communication systems
• Wireless LAN infrastructure
• Base stations for wireless radio networks

Procurement Notes

Verify the specific suffix 'BCPZ' corresponds to the industrial temperature grade (-40°C to +85°C) and the LFCSP-20 package type. Confirm that the ordering information matches the manufacturer's current datasheet revision E specifications regarding absolute maximum ratings and thermal impedance values.

Selection Notes

Select this component when implementing local oscillators for high-frequency upconversion or downconversion sections. Ensure the external loop filter design accommodates the programmable charge pump currents and that the VCO tuning range is compatible with the VP supply voltage capabilities.

Part Context

This part belongs to the ADF4108 series of frequency synthesizers. It is designed to simplify system architecture by eliminating frequency doublers in many high-frequency applications due to its very high bandwidth. The device integrates the necessary dividers and counters to form a complete phase-locked loop when used with external components.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing board layouts and control logic before considering alternative devices.