ADF4110BRU

Overview

The ADF4110BRU is a single-channel, integer-N phase-locked loop (PLL) frequency synthesizer from Analog Devices. It operates with a maximum RF input frequency of 550 MHz and supports power supply voltages ranging from 2.7 V to 5.5 V. The device integrates a low-noise digital phase-frequency detector, a precision charge pump, programmable reference and feedback counters, and a dual-modulus prescaler. It consumes a maximum supply current of 5.5 mA at 3 V and features a 3-wire serial interface for register control. The component is available in a 16-pin TSSOP package.

Feature Summary

• Integrated integer-N PLL with a 550 MHz maximum RF input frequency
• Programmable dual-modulus prescaler supporting 8/9, 16/17, 32/33, and 64/65 ratios
• Separate charge pump supply pin (VP) allows extended tuning voltage up to 6.0 V
• Low power consumption with a typical operating current of 4.5 mA

Applications

• Local oscillators for wireless base station transmitters and receivers
• Frequency synthesis in wireless handsets and mobile devices
• Signal generation for wireless LAN equipment
• Clock sources for communications test and measurement instruments

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm the exact packaging configuration. The base part number indicates the core silicon functionality, while suffixes typically denote reel or tube quantities. Confirm that the B version industrial temperature range meets the operational requirements of the target design.

Selection Notes

Select this component when an external VCO and loop filter are required to complete the phase-locked loop architecture. Ensure the application utilizes a 3-wire serial interface compatible with standard SPI protocols. Verify that the required output frequency can be achieved by the internal N-divider logic given the selected prescaler setting and reference frequency.

Part Context

This device belongs to the ADF411x family of frequency synthesizers, which includes variants optimized for higher frequencies such as the ADF4111 (1.2 GHz), ADF4112 (3.0 GHz), and ADF4113 (4.0 GHz). All members share identical pinouts and functional architectures but differ in their RF front-end specifications and maximum operating frequencies.

Replacement Considerations

The ADF4110BRUZ is a direct pin-compatible replacement offering the same electrical characteristics in a Chip Scale Package (LFCSP). Designers must update PCB footprints and thermal management strategies when transitioning from the TSSOP form factor to the LFCSP variant.