ADF4155BCPZ-RL7

Overview

The ADF4155BCPZ-RL7 is a fractional-N and integer-N PLL frequency synthesizer from Analog Devices Inc. It supports input frequencies from 500 MHz to 8 GHz when used with an external VCO. The device features a high-resolution 38-bit modulus for precise frequency synthesis with 0 Hz error. It includes a programmable dual-modulus prescaler (4/5 or 8/9), a phase frequency detector up to 125 MHz, and a separate charge pump supply (VP) allowing extended tuning voltage in 5 V systems. The RF output can be divided by 1, 2, 4, 8, 16, 32, or 64, enabling output frequencies as low as 7.8125 MHz. It operates on a 3.3 V ± 5% power supply with 1.8 V logic compatibility and uses a 3-wire serial interface.

Feature Summary

• Fractional-N and Integer-N PLL Synthesizer with 38-bit modulus resolution
• RF Input Frequency Range: 500 MHz to 8000 MHz
• Programmable Output Dividers: 1, 2, 4, 8, 16, 32, or 64
• Phase Frequency Detector (PFD) up to 125 MHz
• Separate Charge Pump Supply (VP) for extended tuning voltage

Applications

• Wireless infrastructure (W-CDMA, TD-SCDMA, WiMAX, GSM, PCS, DCS, DECT)
• Point-to-point/point-to-multipoint microwave links
• Test equipment
• Wireless LANs and CATV equipment
• Clock generation

Procurement Notes

Verify the specific ordering suffix BCPZ-RL7 against the manufacturer's current data sheet to confirm package type (LFCSP) and reel packaging details. Ensure that the external components, such as the loop filter and VCO, are compatible with the device's electrical specifications, including the 3.3 V supply and VP range up to 5.5 V.

Selection Notes

Select this component for applications requiring high-frequency synthesis up to 8 GHz with fine frequency resolution. Consider the separate VP pin if operation in 5 V systems with extended tuning voltage is required. Ensure the design accommodates the 24-lead LFCSP package and provides adequate thermal management via the exposed pad.

Part Context

The ADF4155 is part of Analog Devices' family of high-performance PLL frequency synthesizers. It is designed to work with external VCOs and loop filters to create complete synthesizer solutions. The device is suitable for demanding wireless communication standards and test instrumentation applications due to its low phase noise and flexible configuration options.

Replacement Considerations

Check the manufacturer's documentation for direct replacements or updated versions of the ADF4155 series. Ensure any substitute component maintains compatibility with the 3-wire serial interface, 3.3 V supply, and 8 GHz maximum input frequency requirements.