ADF4002BRUZ

Overview

The ADF4002BRUZ is an Integer-N phase detector and frequency synthesizer manufactured by Analog Devices Inc. It operates on a 2.7 V to 3.3 V power supply with a maximum phase detector frequency of 104 MHz. The device features a programmable charge pump with sink/source currents ranging from 625 µA to 5 mA, controlled via an external RSET resistor. It includes a 14-bit reference counter (R) and a 13-bit feedback counter (N), supporting RF input frequencies between 5 MHz and 400 MHz. The component utilizes a 3-wire serial interface for configuration and is housed in a 16-pin TSSOP package.

Feature Summary

• Integrated low-noise digital phase frequency detector (PFD) and precision charge pump
• Programmable charge pump currents selectable via internal latches or external RSET resistor
• Separate charge pump supply pin (VP) supports extended tuning voltages up to 5.5 V
• Dual lock detect outputs: analog (open-drain) and digital (active high)
• Hardware and software power-down modes for current optimization

Applications

• Local oscillator generation for wireless receiver and transmitter upconversion/downconversion
• Clock conditioning and generation for data converters
• Intermediate frequency (IF) local oscillator synthesis

Procurement Notes

Verify the specific suffix against the manufacturer's ordering guide to confirm temperature range and packaging format. Confirm that the RSET resistor value matches the required charge pump current specifications for the target application. Ensure the VP pin voltage does not exceed the absolute maximum rating of 5.8 V relative to ground.

Selection Notes

Select the B version variant for industrial operating temperatures ranging from -40°C to +85°C. Design the external loop filter considering the programmable charge pump current settings and the desired PLL loop bandwidth. Ensure the REFIN input signal amplitude meets the sensitivity requirements, typically biased at AVDD/2 for AC-coupled inputs.

Part Context

The ADF4002BRUZ belongs to the ADF4002 family of frequency synthesizers. It serves as a core building block for implementing complete phase-locked loops when paired with an external voltage-controlled oscillator (VCO) and passive loop filter components. The device allows standalone PFD and charge pump operation by programming the R and N dividers to unity.

Replacement Considerations

Direct replacements within the same series include the ADF4002BCPZ (LFCSP package) and ADF4002BCPZ-RL7. Verify pin compatibility and thermal characteristics when substituting the TSSOP package with the LFCSP variant.