Analog Devices Inc. ADF4001BRUZ-RL

Overview

ADF4001BRUZ-RL from Analog Devices is a 200 MHz bandwidth PLL clock generator IC featuring a 13-bit N counter, 14-bit R counter, and programmable charge pump (ICP up to 5 mA). It operates from 2.7 V to 5.5 V with separate VP supply for extended tuning voltage, and supports 3-wire serial interface for configuration. Used in low-jitter clock smoothing for SONET/ATM infrastructure.

For engineers reviewing the ADF4001BRUZ-RL datasheet, ADF4001BRUZ-RL pinout, ADF4001BRUZ-RL application, or ADF4001BRUZ-RL equivalent, key selection factors include PFD frequency up to 55 MHz, phase noise floor of –161 dBc/Hz at 200 kHz offset, lock detect options (analog/digital), and compatibility with external VCOs/VCXOs in PLL loop design.

Technical Context

The ADF4001BRUZ-RL implements a digital phase-frequency detector (PFD) with programmable antibacklash pulse width (1.3–6.0 ns), precision charge pump with dual current settings (CPI1–CPI3 and CPI4–CPI6), and independent analog/digital lock detection circuitry. Its 24-bit serial interface loads data into four latches-R counter, N counter, function latch, and initialization latch-via MSB-first shifting on CLK rising edge.

It supports two power-down modes (asynchronous/synchronous via CE and PD bits), fastlock capability with timer-controlled current switching between CPI1–CPI3 and CPI4–CPI6, and MUXOUT configurable for lock detect, RF divider output, or reference divider output. The RFINA/RFINB differential input accepts 5–200 MHz RF signals with –10 dBm sensitivity at 5 V operation.

Key Specifications

Pinout & Package

ADF4001BRUZ-RL is packaged in a 16-lead TSSOP (RoHS-compliant, lead-free). Pin functions are validated per Analog Devices' official pin configuration diagram and functional description table (Rev. B, Page 4).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PLL clock generator applications.

Compared with ADF4002BRUZ and LMX2485EVM, the ADF4001BRUZ-RL delivers superior design flexibility via independent VP supply, dual charge pump current control, and full 3-wire configurability-making it ideal for field-upgradable, high-stability telecom timing where external VCO optimization is essential.

Availability

ADF4001BRUZ-RL is available at Aetrix Electronics and suitable for SONET/ATM line cards, DSLAM timing modules, and industrial Ethernet synchronization requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for ADF4001BRUZ-RL includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.

The ADF4001BRUZ-RL belongs to Analog Devices' clock generation and PLL synthesizer product line, engineered specifically for low-phase-noise, high-reliability timing in telecom infrastructure and precision instrumentation.

FAQ

What is the maximum RF input frequency supported by the ADF4001BRUZ-RL?

The ADF4001BRUZ-RL supports an RF input frequency range of 10 MHz to 200 MHz under 5 V operation, as specified in the Rev. B datasheet. At 3 V supply, the range is 5 MHz to 165 MHz. This makes the ADF4001BRUZ-RL suitable for synthesizing common telecom frequencies such as 155.52 MHz (SONET OC-3) and 622.08 MHz (OC-12) when used with appropriate external dividers or VCOs.

How does the dual charge pump current setting work in the ADF4001BRUZ-RL?

The ADF4001BRUZ-RL features two independent charge pump current registers: CPI1–CPI3 for "Current Setting 1" and CPI4–CPI6 for "Current Setting 2". These are selected via the CP gain bit in the N counter latch and controlled by the fastlock mode (F4/F5 bits). In Fastlock Mode 2, the timer counter (TC4–TC1) automatically reverts from Setting 2 back to Setting 1 after a programmable interval - enabling rapid frequency acquisition without manual intervention.

Can the ADF4001BRUZ-RL operate with different analog and digital supply voltages?

No - the ADF4001BRUZ-RL requires AVDD and DVDD to be equal (2.7 V to 5.5 V), as explicitly stated in the Absolute Maximum Ratings and Specifications tables. However, it does support a separate charge pump supply VP, which must be ≥ AVDD and ≤ 6.0 V. This separation allows extended tuning voltage headroom for VCOs while maintaining clean digital/analog domain partitioning.

What are the lock detect options available on the ADF4001BRUZ-RL?

The ADF4001BRUZ-RL provides two lock detect outputs: a digital CMOS lock detect (active-high, driven by MUXOUT when M3–M1 = 001) and an analog N-channel open-drain lock detect (enabled when M3–M1 = 101). The digital version requires no external pull-up; the analog version needs a ~10 kΩ pull-up to VP. Lock criteria are configurable to require either 3 or 5 consecutive PFD cycles with <15 ns phase error.

Is the ADF4001BRUZ-RL pin-compatible with other devices in the ADF400x family?

Yes - the ADF4001BRUZ-RL shares identical pinout and register structure with ADF4002BRUZ and ADF4001 variants in TSSOP and LFCSP packages. Hardware compatibility is confirmed in the datasheet's "Features" section, which states: "Hardware Compatible to the ADF4110/ADF4111/ADF4112/ADF4113" and applies across the ADF400x series. Register maps, timing, and latch behavior are consistent, enabling drop-in replacement where performance margins allow.