ADF41510BCPZ-RL7

Overview

The ADF41510BCPZ-RL7 is a high-performance, ultra-low noise frequency synthesizer manufactured by Analog Devices Inc. It supports integer-N and fractional-N phase-locked loop (PLL) architectures with an RF bandwidth ranging from 1 GHz to 10 GHz. The device operates on a single 3.3 V supply and features a maximum PFD frequency of 250 MHz in integer-N mode and 125 MHz in fractional-N mode. Key electrical specifications include a normalized phase noise floor of −235 dBc/Hz for integer-N and −231 dBc/Hz for fractional-N modes. It utilizes a 25-bit fixed or 49-bit variable modulus sigma-delta modulator for precise frequency resolution.

Feature Summary

• Ultra-low noise performance with a normalized phase noise floor of -235 dBc/Hz (Integer-N) and -231 dBc/Hz (Fractional-N).
• High-speed PFD operation up to 250 MHz (Integer-N) and 125 MHz (Fractional-N) for improved spur performance.
• Flexible modulus options including 25-bit fixed and 49-bit variable sigma-delta modulation for subhertz resolution.
• Integrated 1.8 V logic capability and programmable charge pump currents with a 16x range.

Applications

• Test equipment and instrumentation
• Wireless infrastructure
• Microwave point-to-point and multipoint radios
• Very small aperture terminal (VSAT) radios
• Aerospace and defense

Procurement Notes

Verify the specific ordering suffix RL7 corresponds to the reel packaging configuration required for your assembly line. Confirm that the LFCSP-24 package dimensions align with your PCB footprint design. Ensure that the industrial temperature range of -40°C to +105°C meets your operational environment requirements before finalizing procurement.

Selection Notes

Select this component when designing local oscillators requiring frequencies up to 10 GHz without external doublers. Choose between 25-bit fixed or 49-bit variable modulus based on the required frequency resolution and spur performance. Ensure the external VCO input sensitivity matches the ADF41510's RF output capabilities. Verify that the system can accommodate the total current consumption of approximately 108 mA at 3.3 V.

Part Context

This part belongs to the ADF41510 series of PLL synthesizers from Analog Devices. It is designed using a SiGe BiCMOS process to achieve superior phase noise characteristics compared to standard CMOS solutions. The device serves as a complete PLL solution when paired with an external loop filter and voltage-controlled oscillator (VCO), simplifying system architecture.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. When evaluating alternatives, ensure compatibility with the 3-wire serial interface, 3.3 V supply voltage, and LFCSP-24 package outline. Verify that replacement devices offer comparable phase noise floors and support the required 10 GHz RF input range.

FAQ

What is the difference between the 25-bit fixed and 49-bit variable modulus modes?

The 25-bit fixed modulus provides subhertz frequency resolution suitable for most applications, while the 49-bit variable modulus offers exact frequency resolution down to microhertz levels, useful for precise channel spacing requirements.

How is the charge pump current set on the ADF41510?

The maximum charge pump current is determined by the resistor connected to the RSET pin, with a nominal voltage potential of 0.66 V. The current can be further adjusted via digital registers to provide a 16x programming range.

Can the ADF41510 operate in pure Integer-N mode?

Yes, by setting FRAC1 and FRAC2 to zero, the device operates in purely Integer-N mode, which improves phase noise performance but sets the frequency resolution to the PFD frequency.