ADF4110BCPZ

Overview

The ADF4110BCPZ is an Integer-N RF PLL frequency synthesizer from Analog Devices, designed for local oscillator implementation in wireless systems. It operates with a supply voltage range of 2.7 V to 5.5 V and features a separate charge pump supply (VP) for extended tuning voltage capabilities. The device integrates a low-noise digital phase-frequency detector, precision charge pump, programmable reference divider, and dual-modulus prescaler. Key electrical parameters include an RF input frequency range of 50 MHz to 550 MHz, 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 Integer-N PLL with programmable dual-modulus prescaler options: 8/9, 16/17, 32/33, or 64/65.
• Separate charge pump supply pin (VP) allows operation up to 6.0 V, enabling extended VCO tuning ranges in 3 V systems.
• Programmable charge pump currents set via external RSET resistor, with a maximum output of 5 mA using a 4.7 kΩ resistor.
• Supports hardware and software power-down modes to minimize current consumption when inactive.

Applications

• Local oscillators for GSM, PCS, DCS, CDMA, and WCDMA base station transmitters and receivers.
• Frequency synthesis for wireless handsets supporting GSM, PCS, DCS, CDMA, and WCDMA standards.
• Signal generation components in wireless LAN infrastructure equipment.
• Frequency sources for communications test and measurement instruments.
• Channel synthesis in CATV equipment.

Procurement Notes

Verify the specific suffix 'BCPZ' against the manufacturer's ordering guide to confirm package type and temperature grade. Ensure the design accounts for the LFCSP exposed paddle connection requirements. Confirm that the REFIN signal levels meet the specified sensitivity thresholds for the target supply voltage. Check for any recent revision updates to the data sheet regarding absolute maximum ratings or thermal impedance values.

Selection Notes

Select this component when an Integer-N architecture suffices for the required frequency resolution. The ADF4110 is suitable for applications requiring RF inputs up to 550 MHz; higher frequency variants exist within the family for broader bandwidths. Consider the separate VP pin if the system requires a tuning voltage exceeding the main AVDD supply. Evaluate the programmable prescaler settings to ensure the N-divider output remains within the CMOS counter limits for the desired output frequencies.

Part Context

The ADF4110 is part of the ADF411x family, which includes the ADF4111 (1.2 GHz), ADF4112 (3.0 GHz), and ADF4113 (4.0 GHz). All members share similar functional blocks, including the 3-wire interface and charge pump structure, but differ primarily in their RF input stage specifications and maximum operating frequencies. This family is optimized for cost-effective, low-power frequency synthesis in mobile and fixed wireless communication platforms.

Replacement Considerations

Direct replacements within the same package and functionality include the ADF4111BCPZ, ADF4112BCPZ, and ADF4113BCPZ, provided the application does not exceed the 550 MHz RF input limit of the ADF4110. Verify that the loop filter design remains stable when transitioning between devices with different internal phase detector characteristics or charge pump current scaling factors.