ADF4112BRUZ-REEL

Overview

The ADF4112BRUZ-REEL is an Integer-N RF PLL frequency synthesizer from Analog Devices, designed for local oscillator implementation in wireless transceivers. It operates with a maximum RF input frequency of 3.0 GHz and supports a supply voltage range of 2.7 V to 5.5 V. The device features a low-noise digital phase frequency detector, a precision charge pump, and programmable counters (A: 6-bit, B: 13-bit) combined with a dual-modulus prescaler. Key electrical parameters include a typical operating current of 6.5 mA at 5 V, a reference input frequency range of 5 MHz to 104 MHz, and a phase detector frequency limit of 55 MHz. It is housed in a 16-pin TSSOP package.

Feature Summary

• Maximum RF input frequency of 3.0 GHz with programmable dual-modulus prescaler options (8/9, 16/17, 32/33, 64/65).
• Integrated low-noise digital PFD and precision charge pump with programmable currents and antibacklash pulse width.
• Supports separate charge pump supply (VP) up to 6.0 V to extend tuning voltage capabilities in 3 V systems.
• Includes analog and digital lock detect functions alongside hardware and software power-down modes.

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 for wireless LAN infrastructure and communications test equipment.
• Frequency synthesis components for CATV equipment.

Procurement Notes

Verify the specific reel packaging configuration against the manufacturer's ordering guide, as suffixes may indicate tape-and-reel quantities or variant specifications. Confirm that the B version industrial temperature rating (-40°C to +85°C) aligns with the target application environment. Ensure compatibility with the 3-wire serial interface timing requirements during system integration.

Selection Notes

Select this component when an Integer-N architecture is required for frequencies up to 3.0 GHz. Evaluate the programmable prescaler settings to ensure the N-divider output remains within the CMOS counter limits. Consider the separate VP supply pin if the design requires extended VCO tuning voltages beyond the main AVDD level. Verify that the external loop filter design accommodates the programmable charge pump current ranges.

Part Context

This part belongs to the ADF4110 family of frequency synthesizers, which shares a common functional block diagram and control interface. The ADF4112 specifically targets the 3.0 GHz upper frequency limit compared to the ADF4110 (550 MHz) and ADF4111 (1.2 GHz). It serves as a direct replacement for legacy designs requiring higher frequency synthesis within the same package footprint.

Replacement Considerations

Direct pin-compatible substitutes within the same family include the ADF4110BRUZ, ADF4111BRUZ, and ADF4113BRUZ. Note that the ADF4113 supports up to 4.0 GHz, while the ADF4110 and ADF4111 operate at lower maximum frequencies. All variants share the same 16-pin TSSOP outline and register map.