ADF4111BCPZ-RL7

Overview

The ADF4111BCPZ-RL7 is a single Integer-N RF PLL frequency synthesizer from Analog Devices, designed for local oscillator implementation in wireless transceivers. It features a low-noise digital phase-frequency detector, precision charge pump, and programmable dual-modulus prescaler (8/9, 16/17, 32/33, or 64/65). The device operates on a 2.7 V to 5.5 V supply with a separate charge pump supply (VP) up to 6.0 V. Key electrical parameters include an RF input frequency range of 80 MHz to 1.2 GHz, a maximum phase detector frequency of 55 MHz, and a typical operating current of 4.5 mA at 3 V. It utilizes a 3-wire serial interface for register control.

Feature Summary

• Integrated low-noise digital PFD and precision charge pump with programmable currents.
• Programmable dual-modulus prescaler supporting division ratios of 8/9, 16/17, 32/33, and 64/65.
• Separate charge pump supply pin (VP) allows extended tuning voltage up to 6.0 V in 3 V systems.
• Hardware and software power-down modes for reduced current consumption.

Applications

• Local oscillators for GSM, PCS, DCS, CDMA, and WCDMA base station transmitters.
• Frequency synthesis for wireless handsets and mobile communication devices.
• Signal generation in wireless LAN infrastructure equipment.
• Component in communications test and measurement instruments.

Procurement Notes

Verify the B version designation confirms the -40°C to +85°C industrial temperature range. Confirm the RL7 suffix indicates reel packaging. Ensure the LFCSP-20 package matches the target PCB footprint. Check for moisture sensitivity level requirements during assembly.

Selection Notes

Select the ADF4111 when the required RF output frequency extends up to 1.2 GHz. Choose this model over the ADF4110 if higher frequency coverage is needed. Consider the ADF4112 or ADF4113 only if frequencies exceed 1.2 GHz. Verify that the external VCO tuning voltage does not exceed the VP pin limit of 6.0 V.

Part Context

This component belongs to the ADF411x family of RF PLL frequency synthesizers. The ADF4111 specifically targets applications requiring operation up to 1.2 GHz, distinguishing it from the lower-frequency ADF4110 (550 MHz) and higher-frequency ADF4112 (3.0 GHz) and ADF4113 (4.0 GHz) variants within the same series.

Replacement Considerations

Direct functional substitutes within the same family include the ADF4110, ADF4112, and ADF4113. Note that these alternatives have different maximum RF input frequencies and may require adjustments to loop filter design and register settings to match specific system performance requirements.