ADF4111BRU-REEL7

Overview

The ADF4111BRU-REEL7 is a single-channel, integer-N phase-locked loop (PLL) frequency synthesizer from Analog Devices. It supports RF input frequencies ranging from 80 MHz to 1.2 GHz and operates on a power supply between 2.7 V and 5.5 V. The device integrates a low-noise digital phase-frequency detector, a precision charge pump with programmable currents, and a dual-modulus prescaler. Key electrical parameters include a typical operating current of 4.5 mA at 5 V and a maximum allowable prescaler output frequency of 165 MHz. It features a 3-wire serial interface for register control and is housed in a 16-lead TSSOP package.

Feature Summary

• Supports RF input frequencies up to 1.2 GHz with a 2.7 V to 5.5 V supply range
• Integrates a programmable dual-modulus prescaler (8/9, 16/17, 32/33, 64/65)
• Features a precision charge pump with programmable sink/source currents
• Includes hardware and software power-down modes for energy efficiency

Applications

• Local oscillators for wireless base stations (GSM, PCS, DCS, CDMA, WCDMA)
• Frequency synthesis for wireless handsets
• Wireless LAN applications
• Communications test equipment
• CATV equipment

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm packaging details such as reel quantity or tape specifications. Ensure that the B-version temperature rating (-40°C to +85°C) aligns with the intended operational environment. Cross-reference the pinout configuration with the target PCB footprint to guarantee compatibility during assembly.

Selection Notes

Select this component when an RF input frequency up to 1.2 GHz is required within the ADF4110 family. Consider the separate charge pump supply (VP) pin if extended tuning voltage is needed in 3 V systems. Evaluate the programmable prescaler options to ensure the division ratio meets the desired frequency resolution and loop bandwidth requirements for the specific application.

Part Context

This part belongs to the ADF4110 family of RF PLL frequency synthesizers, which also includes the ADF4110 (550 MHz), ADF4112 (3.0 GHz), and ADF4113 (4.0 GHz). All members share similar architectural features, including the 3-wire serial interface and dual-modulus prescaler capabilities, differing primarily in their maximum RF input frequency specifications and associated power consumption characteristics.

Replacement Considerations

Direct functional substitutes within the same family include the ADF4110, ADF4112, and ADF4113, provided the RF frequency requirements are met. Verify pin compatibility and thermal performance when substituting, as higher-frequency variants may have different power dissipation profiles.