ADF4111BCPZ

Overview

The ADF4111BCPZ is an integer-N RF PLL frequency synthesizer from Analog Devices, designed for local oscillator generation in wireless communication systems. It supports a maximum RF input frequency of 1.2 GHz and operates on a single power supply ranging from 2.7 V to 5.5 V. The device features a low-noise digital phase-frequency detector, a precision charge pump with programmable currents, and a programmable dual-modulus prescaler (8/9, 16/17, 32/33, or 64/65). It includes separate analog and digital supplies, hardware/software power-down modes, and a 3-wire serial interface for register control.

Feature Summary

• Maximum RF input frequency of 1.2 GHz with integrated dual-modulus prescaler
• Programmable charge pump currents via external RSET resistor
• Separate VP pin allows extended tuning voltage up to 6.0 V
• Low power consumption: typical IDD of 4.5 mA at 3 V

Applications

• Local oscillators for GSM, PCS, DCS, CDMA, and WCDMA base stations
• Wireless handsets and LAN equipment
• Communications test equipment
• CATV equipment

Procurement Notes

Verify the specific suffix against the manufacturer's ordering guide to confirm package type and temperature range. Ensure the component meets RoHS compliance requirements for the intended market. Check for moisture sensitivity levels if the part has been stored for extended periods prior to assembly.

Selection Notes

Select the ADF4111BCPZ when the application requires a frequency synthesizer with an upper limit of 1.2 GHz. Consider the separate VP supply pin if the target VCO requires a tuning voltage exceeding the main AVDD level. Verify that the required reference frequency falls within the 5 MHz to 104 MHz range for optimal performance.

Part Context

This component belongs to the ADF411x family, which shares a common architecture but differs in maximum operating frequencies. The ADF4110 supports up to 550 MHz, the ADF4112 up to 3.0 GHz, and the ADF4113 up to 4.0 GHz. All variants utilize the same pinout and register structure, facilitating design flexibility across different frequency bands.

Replacement Considerations

Direct functional replacements within the same family include the ADF4110BCPZ, ADF4112BCPZ, and ADF4113BCPZ. These parts share identical pin configurations and software compatibility. Selection depends on whether the system requires lower or higher maximum RF input frequencies than 1.2 GHz.