ADF4155BCPZ-RL7

The ADF4155BCPZ-RL7 is Analog Devices’ wideband fractional-N PLL synthesizer with an integrated VCO. It’s designed to generate precise RF frequencies across tens of MHz up to several GHz for wireless and RF systems.
Key points:
- Fractional-N architecture with a delta-sigma fractional modulator to achieve fine frequency resolution and low spurs.
- Integrated VCO and PLL core; requires an external loop filter (as with other ADF fractional-N parts) and reference clock input.
- SPI-compatible control interface for programmable N, modulus, fractional settings, output power, mute, and other control features.
- Wide tuning range, low phase noise, suitable for SDRs, cellular/wireless transceivers, radar, and test equipment.
- Package: BCPZ (LFCSP) RoHS-compliant; RL7 denotes lead-free version.
Use when you need flexible, high-resolution RF synthesis with decent phase noise performance in a compact package.

Key features of ADF4155BCPZ-RL7 (Analogue Devices):
- Fractional-N PLL synthesizer for wideband RF applications
- Wide RF synthesis range up to multi-GHz with programmable division/mode
- Fractional-N operation with programmable modulus; dithering to reduce spurs
- Low phase noise and reduced spurious performance
- SPI-compatible serial control interface for register programming (multi-byte writes/readback)
- Programmable reference divider and flexible reference input
- Programmable output divider chain with fast frequency switching
- Lock detect and digital lock detect indicators
- Programmable charge-pump current; adaptable power-down and enable modes
- RoHS-compliant BCPZ package with RL7 tape-and-reel
Note: For exact electrical specs (frequencies, spurs, currents, timings), consult the latest datasheet.

Pin count: 32 pins (32‑lead LFCSP, part code CPZ‑RL7).
Function (concise): The ADF4155B is a wideband fractional-/integer‑N PLL frequency synthesizer. Key pin roles include:
- Power/Ground: VDD, AVDD, DGND, AGND
- Reference and RF: REF IN (reference clock), RF OUT (synthesized RF output)
- Control interface: DATA/SDI, CLK/SCLK, LE/CS (3‑wire serial control)
- PLL blocks: CP+/CP– (charge pump outputs), LD (lock detect)
- Other: prescaler/divider inputs and programming pins for R, N, and auxiliary functions.
Used to generate/lock local oscillator frequencies in RF systems.

Manufacturer: Analog Devices, Inc. (ADI).
What kind of company: ADI is an American multinational semiconductor company that designs and manufactures high‑performance analog, mixed‑signal and digital signal‑processing integrated circuits and related products. It supplies data converters, amplifiers, power‑management, RF/microwave components (including PLLs like the ADF4155 family), sensors and signal‑chain solutions for industrial, communications, automotive, consumer and aerospace/defense markets. ADI is publicly traded (NASDAQ: ADI) and headquartered in Norwood, Massachusetts, USA.

- Broadband wireless infrastructure (base stations, backhaul links, point-to-point radios)
- RF/microwave front-ends: agile LO generation for mixers and down/up converters (several GHz)
- Radar, surveillance, aerospace/defense instrumentation requiring wideband, fractional-N synthesis
- RF test & measurement equipment (signal generators, tunable LO sources)
- Laboratory/bench-top applications: research prototypes, clock distribution, and programmable frequency synthesis setups

The ADF4155BCPZ-RL7 is supplied in a 16‑lead LFCSP (lead‑frame chip‑scale package) with an exposed thermal paddle and is shipped on a 7″ reel.