ADF4112BRU-REEL7

Overview

The ADF4112BRU-REEL7 is a single integer-N phase-locked loop (PLL) frequency synthesizer from Analog Devices, designed for local oscillator applications in wireless systems. It supports RF input frequencies up to 3.0 GHz and operates on a 2.7 V to 5.5 V power supply. Key electrical parameters include a maximum phase detector frequency of 55 MHz, a programmable charge pump with a typical high value of 5 mA, and a typical operating current of 6.5 mA at 5 V. The device features a separate charge pump supply pin (VP) to allow extended tuning voltage ranges.

Feature Summary

• Supports RF input frequencies up to 3.0 GHz with a 55 MHz maximum phase detector frequency.
• Includes a programmable dual-modulus prescaler with options for 8/9, 16/17, 32/33, or 64/65 division ratios.
• Features a separate charge pump supply (VP) pin to enable extended tuning voltages in 3 V systems.
• Integrates analog and digital lock detect functions alongside hardware and software power-down modes.

Applications

• Base stations for wireless radio technologies including GSM, PCS, DCS, CDMA, and WCDMA.
• Wireless handsets supporting GSM, PCS, DCS, CDMA, and WCDMA standards.
• Communications test equipment requiring precise frequency synthesis.
• CATV equipment utilizing local oscillators for signal processing.

Procurement Notes

Verify the component status as End-of-Life (EOL) before procurement planning. Confirm that the B version industrial temperature range (-40°C to +85°C) meets application requirements. Ensure the TSSOP-16 package dimensions align with PCB layout constraints. Check for RoHS compliance status as indicated by manufacturer documentation.

Selection Notes

Select the ADF4112BRU-REEL7 when an RF input frequency up to 3.0 GHz is required. Choose this model over the ADF4110 (550 MHz) or ADF4111 (1.2 GHz) if higher frequency operation is necessary. Consider the ADF4113 (4.0 GHz) only if frequencies exceeding 3.0 GHz are needed. Verify that the 6.5 mA typical current consumption fits the system power budget.

Part Context

This component belongs to the ADF4110 family of RF PLL frequency synthesizers, which also includes the ADF4110, ADF4111, and ADF4113 models. These devices share a common architecture featuring a low-noise digital PFD, precision charge pump, and programmable counters. The ADF4112 specifically targets the 3.0 GHz upper limit within this series, offering a balance between frequency range and power consumption.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. As the component is listed as End-of-Life, alternative sourcing should focus on authorized distributors for remaining stock or engineering evaluations of newer generation synthesizers from Analog Devices.