ADF4001BRU

Overview

The ADF4001BRU is a 200 MHz bandwidth integer-N clock generator PLL from Analog Devices, housed in a 16-lead TSSOP package. It operates on a single supply voltage ranging from 2.7 V to 5.5 V, with a typical operating current of 4.5 mA. The device integrates a low-noise digital phase frequency detector (PFD), a precision charge pump, a programmable 13-bit N counter, and a 14-bit R counter. It features a separate charge pump supply pin (VP) to support extended tuning voltages up to 6.0 V in 5 V systems. The component utilizes a 3-wire serial interface for configuration and supports hardware and software power-down modes.

Feature Summary

• 200 MHz RF input bandwidth with ultralow phase noise characteristics
• Programmable charge pump currents via 3-wire serial interface
• Separate VP supply pin allows extended tuning voltage in 5 V systems
• Hardware compatible with ADF4110/ADF4111/ADF4112/ADF4113 families

Applications

• Clock generation for PLLs requiring stable reference signals
• Low jitter clock source applications
• SONET, ATM, ADM, DSLAM, and SDM systems
• Frequency translation circuits

Procurement Notes

Verify the specific suffix 'BRU' corresponds to the tube packaging variant rather than the reel or cut tape options. Confirm that the B-version industrial temperature range (-40°C to +85°C) meets system requirements. Ensure the 16-lead TSSOP footprint matches the PCB layout design. Check for RoHS compliance status as indicated in official documentation.

Selection Notes

Select this component when a low-noise integer-N synthesizer is required for frequencies up to 200 MHz. The separate VP supply is critical if the external VCO requires a tuning voltage exceeding the logic supply voltage. Ensure the available charge pump currents (ranging from ~0.3 mA to ~5 mA depending on RSET) are sufficient for the external loop filter design. Verify compatibility with existing microcontroller serial interfaces for the 3-wire control protocol.

Part Context

The ADF4001 belongs to the ADF4001 family of clock generators designed for low-frequency PLL applications. It serves as a core synthesizer component that requires an external voltage-controlled oscillator (VCO) or voltage-controlled crystal oscillator (VCXO) and an external loop filter to function as a complete phase-locked loop. The BRU designation specifically identifies the 16-lead TSSOP package version of this integrated circuit.

Replacement Considerations

The datasheet explicitly states hardware compatibility with the ADF4110, ADF4111, ADF4112, and ADF4113 models. These parts share similar functional latch structures and pinouts, allowing for potential direct replacements in designs utilizing those specific variants.