ADF4110BRU-REEL

Overview

The ADF4110BRU-REEL 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 supports RF input frequencies up to 550 MHz with a supply voltage range of 2.7 V to 5.5 V. Key electrical parameters include a maximum PFD frequency of 55 MHz, programmable charge pump currents, and a 3-wire serial interface for register control.

Feature Summary

• Single-channel Integer-N PLL architecture with integrated N divider (N = BP + A) and 14-bit reference counter.
• Programmable dual-modulus prescaler options: 8/9, 16/17, 32/33, and 64/65.
• Separate charge pump supply pin (VP) allows extended tuning voltage up to 6.0 V in 3 V systems.
• Hardware and software power-down modes with low-power sleep current of 1 µA typical.

Applications

• Local oscillators for GSM, PCS, DCS, CDMA, and WCDMA base station transmitters and receivers.
• Wireless handsets supporting GSM, PCS, DCS, CDMA, and WCDMA standards.
• Communications test equipment requiring stable frequency synthesis.
• CATV equipment and wireless LAN applications.

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current data sheet to confirm package type and reel specifications. The BRU designation indicates a TSSOP-16 package. Confirm that the REEL suffix matches the required tape-and-reel quantity for production integration. Cross-reference the RoHS status and lead-free compliance requirements with the latest product release notes.

Selection Notes

Select the ADF4110 variant specifically when the application requires an RF input frequency range up to 550 MHz. For higher frequency requirements, consider the ADF4111 (1.2 GHz), ADF4112 (3.0 GHz), or ADF4113 (4.0 GHz) within the same family. Ensure the external VCO tuning voltage range is compatible with the VP pin configuration if operating at 3 V logic levels. Verify that the desired charge pump current settings can be achieved with the available RSET resistor values.

Part Context

This component belongs to the ADF4110 family of single-channel, integer-N PLL frequency synthesizers. The family shares a common functional block diagram and interface protocol but differs in maximum RF input frequency capabilities. The ADF4110 serves as the entry-level model for sub-600 MHz applications, while siblings cover higher bands up to 4.0 GHz.

Replacement Considerations

Direct functional replacements within the same package and pinout include the ADF4111, ADF4112, and ADF4113, provided the RF frequency requirements are met. Note that these variants have different maximum input frequencies and may require adjustments to the loop filter design due to varying internal prescaler characteristics.