ADF4113BRU

Overview

The ADF4113BRU is an integer-N RF PLL frequency synthesizer from Analog Devices, designed for local oscillator implementation in wireless transceivers. It features a low-noise digital phase-frequency detector, precision charge pump, and programmable dual-modulus prescaler (8/9, 16/17, 32/33, 64/65). The device operates on a 2.7 V to 5.5 V supply with a typical current of 8.5 mA. It supports RF input frequencies up to 4.0 GHz and includes a separate charge pump supply (VP) for extended tuning voltage. Control is managed via a 3-wire serial interface, and it offers hardware/software power-down modes.

Feature Summary

• RF Frequency Range: Supports input frequencies up to 4.0 GHz.
• Dual-Modulus Prescaler: Programmable options include 8/9, 16/17, 32/33, and 64/65.
• Charge Pump: Features programmable currents and antibacklash pulse width; separate VP pin allows extended tuning voltage.
• Interface & Control: Utilizes a 3-wire serial interface with analog and digital lock detect capabilities.

Applications

• Base stations for wireless radio (GSM, PCS, DCS, CDMA, WCDMA)
• Wireless handsets (GSM, PCS, DCS, CDMA, WCDMA)
• Wireless LANs
• Communications test equipment
• CATV equipment

Procurement Notes

Verify the specific package variant when ordering. The suffix 'RU' typically denotes the LFCSP package, while 'BRUZ' indicates TSSOP. Confirm availability status as distribution may vary. Ensure the design accounts for the correct pinout corresponding to the selected package type to avoid assembly errors.

Selection Notes

Select the ADF4113BRU when an RF input frequency up to 4.0 GHz is required. Compare against ADF4112 (3.0 GHz) or ADF4111 (1.2 GHz) if lower frequency operation suffices. Consider the separate VP pin requirement for systems needing tuning voltages exceeding the main AVDD supply. Verify that the prescaler division ratio matches the desired output frequency range.

Part Context

The ADF4113 is part of the ADF4110 family, which shares a common architecture including the PFD, charge pump, and counters. This family simplifies design across different frequency bands by offering standardized interfaces and control registers. The ADF4113 represents the highest frequency variant within this specific integer-N synthesizer group.

Replacement Considerations

ADF4113HVBRUZ is a high-voltage charge pump variant within the same family. Other family members like ADF4112BRU offer similar functionality at lower maximum RF frequencies. Check datasheet revisions for any pinout or electrical specification updates before substitution.