ADF4112BRUZ

The ADF4112BRUZ is Analog Devices’ high-performance fractional-N frequency synthesizer. It locks a voltage-controlled oscillator (VCO) to a reference clock using a programmable fractional-N divider, controlled by a serial SPI-like interface.
Key points:
- Frational-N synthesizer with a dual-modulus prescaler, programmable modulus (MOD) and fractional value (FRAC) for fine frequency resolution.
- Programmable reference divider and a sigma-delta fractional divider to minimize spurs and jitter.
- Integrated phase detector and charge pump; programmable output current and good phase-noise performance.
- SPI control: set N, MOD, FRAC, CP current/polarity, lock detect, power-down, and other housekeeping features.
- Requires an external VCO and RF network; f_out ≈ f_ref × (N + FRAC/MOD), with the VCO operating in the target RF range.
- Applications: wireless transceivers, RF front-ends, radar, instrumentation, and any system needing agile, high-resolution LO synthesis.
For exact electrical specs, pinout, and register map, consult the ADF4112 datasheet and the BRUZ package documentation.

Here are the key features of the ADF4112BRUZ (highlights; refer to the datasheet for exact figures):
- Fractional-N PLL synthesizer with integrated VCO for RF LO generation
- Dual-modulus prescaler (typical values such as 32/33 or 16/17) for wide frequency agility
- Programmable reference divider (R) and modulus/divider settings for precise output steps
- Delta-sigma fractional-N architecture to minimize fractional spurs and improve phase noise
- SPI-compatible serial interface for easy register programming (N, R, modulus, CP current, etc.)
- Integrated low-noise phase detector, charge pump, and VCO driver (reduced external components)
- Wide operating frequency range with external loop-filter guidance to optimize phase noise
- Power-down and shutdown modes; flexible power supply options consistent with typical RF front ends
Notes:
- Exact prescaler options, reference frequencies, VCO tuning range, and supply voltages vary by package and revision; consult the latest datasheet for specifics.
- Suitable for RF transceivers and LO generation where fine fractional steps and low phase noise are required.

8-pin RoHS-compliant SOIC (surface-mount) package.

- Pin count: 16 pins (16-pin package).
- Function: Fractional-N phase-locked loop (PLL) frequency synthesizer. It uses a serial control interface (SPI-like) to program the N and R counters and the fractional modulus, provides reference input, VCO output/feedback handling, and associated charge-pump/lock-detect signals for external VCO frequency synthesis.

The ADF4112BRUZ is manufactured by Analog Devices, Inc. (Analog Devices).
Analog Devices is an American multinational semiconductor company that designs and manufactures analog, mixed-signal, and digital signal processing (DSP) integrated circuits.

Applications of ADF4112BRUZ:
- RF/microwave frequency synthesis for wireless transceivers and base stations
- Local-oscillator generation for receivers/transmitters
- Wireless standards equipment (GSM/CDMA/LTE, Wi‑Fi, Bluetooth) transceivers
- Test & measurement equipment (signal generators, PLLs, RF synths)
- Instrumentation requiring precise fractional-N synthesis
- Radar and aerospace/defense RF systems
- Clocking and timing circuits in data communications