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Home > Products > Integrated Circuits (ICs) > Clock/Timing > Clock Generators, PLLs, Frequency Synthesizers

Analog Devices Inc. ADF4001BRU

Name: ADF4001BRU
Brand: Analog Devices Inc.
SKU: ADF4001BRU
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ADF4001BRU

Manufacturer:: Analog Devices Inc.

Category:: Clock Generators, PLLs, Frequency Synthesizers

Package:: 16-TSSOP (0.173", 4.40mm Width)

Datasheet:: ADF4001BRU.pdf

Description:: IC CLOCK GENERATOR 16TSSOP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

ADF4001BRU from Analog Devices is a 200 MHz bandwidth PLL clock generator IC featuring a low-noise phase-frequency detector, programmable 13-bit N counter (1–8191), 14-bit R counter (1–16383), and dual programmable charge pump current settings (625 µA–5 mA). It operates from 2.7 V to 5.5 V with separate VP supply up to 6.0 V, enabling extended tuning voltage in 5 V systems. Used in SONET/ATM clock synthesis and low-jitter VCXO-based timing circuits.

For engineers reviewing the ADF4001BRU datasheet, ADF4001BRU pinout, ADF4001BRU application, or ADF4001BRU equivalent, this page delivers verified functional identity, confirmed TSSOP-16/LFCSP-20 package mapping, validated 24-bit serial interface timing, lock detect behavior (digital/analog), and real-world PLL implementation constraints including PFD frequency limit (55 MHz max), RF input sensitivity (–10 dBm min @ 5/165 MHz), and phase noise floor (–161 dBc/Hz @ 200 kHz).

Technical Context

The ADF4001BRU implements a digital phase-frequency detector with programmable antibacklash pulse width (1.3–6.0 ns) and supports both synchronous and asynchronous power-down via CE pin and PD1/PD2 bits. Its dual charge pump current settings (CPI1–CPI3 and CPI4–CPI6) enable dynamic loop bandwidth adjustment during frequency transitions using FastLock Mode 1 or 2, controlled by timer counter bits TC4–TC1 (3–63 PFD cycles).

It integrates a 24-bit serial interface with MSB-first loading, three-wire control (CLK/DATA/LE), and latch selection via C2/C1 bits. The MUXOUT pin provides selectable access to digital lock detect, analog lock detect, N-divider output, R-divider output, or SDOUT - all configured via M3/M2/M1 bits in the function latch.

Key Specifications

Parameter	Value and Actual Design Meaning
RF Input Frequency Range	5–165 MHz (3 V) or 10–200 MHz (5 V): defines usable VCO/VCXO feedback signal bandwidth.
PFD Maximum Frequency	55 MHz: sets upper limit on reference divider output frequency driving phase detector.
Charge Pump Current Range	625 µA–5 mA (programmable in two independent settings): enables optimized loop filter design for stability vs. lock time trade-off.
Phase Noise Floor	–161 dBc/Hz @ 200 kHz PFD frequency: quantifies intrinsic jitter contribution from synthesizer core.
Lock Detect Accuracy	Digital lock detect triggers after 3 or 5 consecutive PFD cycles with phase error <15 ns: ensures reliable PLL lock validation in production systems.
Supply Voltage Range	AVDD/DVDD = 2.7–5.5 V; VP ≥ AVDD up to 6.0 V: allows independent tuning voltage rail for wide-range VCOs.
Operating Temperature	–40°C to +85°C (Industrial B version): qualified for embedded telecom and industrial timing applications.

Pinout & Package

ADF4001BRU is available in 16-lead TSSOP and 20-lead LFCSP packages. Both variants share identical pin functions and electrical behavior; the LFCSP includes an exposed pad (EPAD) that must be connected to AGND for thermal and noise performance.

Pin/Terminal	Circuit Role	Design Meaning
RSET	Charge pump current calibration reference	Resistor-to-ground sets ICP MAX via ICP = 5.23 / RSET (kΩ); 4.7 kΩ yields 5 mA typical.
CP	Charge pump output	Drives external loop filter; enters high-impedance state during power-down or when CP three-state bit is set.
CPGND	Charge pump ground return	Separate low-noise ground path for charge pump current; must be isolated from DGND/AGND planes per layout guidelines.
RFINA / RFINB	Differential RF input to N counter	AC-coupled inputs accepting 5–200 MHz signals; RFINB requires 100 pF bypass to ground.
REFIN	Reference clock input	CMOS-compatible input (0–VDD) supporting 5–104 MHz; DC-coupled for f < 5 MHz, AC-coupled otherwise.
CE	Chip enable	Asynchronous hardware power-down: logic low forces immediate shutdown and CP three-state regardless of register state.
CLK / DATA / LE	3-wire serial interface	MSB-first 24-bit shift register interface; LE rising edge latches data into R/N/function/initialization latches per C2/C1 bits.
MUXOUT	Configurable multiplexer output	Selectable via M3/M2/M1: digital lock detect, analog lock detect (open-drain), N/R-divider outputs, SDOUT, or power rails.

Key Features

Feature	Design Value
Separate VP supply rail	Enables 5 V tuning voltage in 3 V digital/analog systems, extending VCO/VCXO frequency range without level-shifting.
Programmable antibacklash pulse	Configurable 1.3–6.0 ns pulse width minimizes dead-zone-induced reference spurs and phase noise degradation.
FastLock dynamic current switching	Switches charge pump current to higher setting (e.g., 5 mA) during frequency change, then auto-reverts after TC4–TC1 timeout (3–63 PFD cycles).
Dual lock detect outputs	Digital lock detect (active-high CMOS) and analog lock detect (N-channel open-drain with 10 kΩ pull-up) provide redundancy for safety-critical timing systems.
Hardware/software power-down	Three independent power-down modes: CE-pin asserted, asynchronous (PD1=1, PD2=0), or synchronous (PD1=1, PD2=1) - prevents frequency jumps during transition.

Applications

SONET/SDH Line Cards	DSLAM Timing Modules
Use Scenario: Generating stable 155.52 MHz or 622.08 MHz reference clocks for OC-3/OC-12 framer ICs and SERDES PHYs. IC Role / Device Role / Timing Role: PLL clock generator providing low-phase-noise, jitter-cleaned reference derived from 19.44 MHz or 77.76 MHz crystal oscillator. Use Value: Achieves –99 dBc/Hz phase noise at 1 kHz offset (200 MHz output), meeting GR-1244-CORE jitter accumulation requirements.	Use Scenario: Clock smoothing and frequency translation in broadband access multiplexers handling ADSL2+/VDSL2 line cards. IC Role / Device Role / Timing Role: Reference clock synthesizer converting 10 MHz GPS-disciplined oscillator to 13.5 MHz video clock or 25 MHz Ethernet PHY clock. Use Value: Programmable R/N dividers allow exact integer division ratios; eliminates fractional-N spurs affecting spectral mask compliance.
ATM Switch Fabric Timing	Industrial PLC Synchronization
Use Scenario: Providing deterministic 53-byte cell timing across distributed ATM switch modules with sub-100 ps jitter tolerance. IC Role / Device Role / Timing Role: Low-jitter clock source feeding clock distribution ICs (e.g., IDT 5V9885) in multi-chip timing trees. Use Value: Ultralow phase noise floor (–161 dBc/Hz) and –95 dBc spurious suppression minimize timing uncertainty in high-speed backplane links.	Use Scenario: Synchronizing distributed I/O modules in modular PLC systems requiring IEEE 1588-2008 PTP slave clock alignment. IC Role / Device Role / Timing Role: Precision reference generator locked to GPS 1PPS, producing 10 MHz or 100 MHz local oscillator for time-stamping engines. Use Value: Analog and digital lock detect outputs enable fail-safe monitoring; hardware CE pin allows rapid fault isolation during field maintenance.

SONET/SDH Line Cards

DSLAM Timing Modules

Use Scenario: Generating stable 155.52 MHz or 622.08 MHz reference clocks for OC-3/OC-12 framer ICs and SERDES PHYs.

IC Role / Device Role / Timing Role: PLL clock generator providing low-phase-noise, jitter-cleaned reference derived from 19.44 MHz or 77.76 MHz crystal oscillator.

Use Value: Achieves –99 dBc/Hz phase noise at 1 kHz offset (200 MHz output), meeting GR-1244-CORE jitter accumulation requirements.

Use Scenario: Clock smoothing and frequency translation in broadband access multiplexers handling ADSL2+/VDSL2 line cards.

IC Role / Device Role / Timing Role: Reference clock synthesizer converting 10 MHz GPS-disciplined oscillator to 13.5 MHz video clock or 25 MHz Ethernet PHY clock.

Use Value: Programmable R/N dividers allow exact integer division ratios; eliminates fractional-N spurs affecting spectral mask compliance.

ATM Switch Fabric Timing

Industrial PLC Synchronization

Use Scenario: Providing deterministic 53-byte cell timing across distributed ATM switch modules with sub-100 ps jitter tolerance.

IC Role / Device Role / Timing Role: Low-jitter clock source feeding clock distribution ICs (e.g., IDT 5V9885) in multi-chip timing trees.

Use Value: Ultralow phase noise floor (–161 dBc/Hz) and –95 dBc spurious suppression minimize timing uncertainty in high-speed backplane links.

Use Scenario: Synchronizing distributed I/O modules in modular PLC systems requiring IEEE 1588-2008 PTP slave clock alignment.

IC Role / Device Role / Timing Role: Precision reference generator locked to GPS 1PPS, producing 10 MHz or 100 MHz local oscillator for time-stamping engines.

Use Value: Analog and digital lock detect outputs enable fail-safe monitoring; hardware CE pin allows rapid fault isolation during field maintenance.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ADF4113BRU	Higher PFD frequency (110 MHz), integrated LDO, no separate VP pin, same 16-TSSOP package.	Designed for higher-frequency synthesizers (up to 4 GHz with external prescaler); lacks VP flexibility for wide-tuning VCXOs.	Choose ADF4113BRU when system uses >200 MHz reference and requires integrated power regulation; retain ADF4001BRU for VP-driven VCXO designs.
LMX2531LQ1700E	Fractional-N architecture, integrated VCO, 1700 MHz max output, SPI interface, different pinout and biasing.	Self-contained RF synthesizer eliminating external VCO/loop filter; unsuitable for discrete VCXO-based clock cleaning.	Use LMX2531LQ1700E for compact RF signal generation; ADF4001BRU remains optimal for low-noise, externally filtered clock synthesis.

Compared with ADF4113BRU and LMX2531LQ1700E, the ADF4001BRU uniquely balances ultra-low phase noise, VP-supplied tuning headroom, and discrete loop filter control-making it irreplaceable in VCXO-based telecom clock modules where jitter floor and tuning range are co-constrained.

Availability

ADF4001BRU is available at Aetrix Electronics and suitable for SONET/ATM line cards, DSLAM timing modules, and industrial PLC synchronization requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for ADF4001BRU 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 DSP technologies, serving precision instrumentation, communications, and industrial markets since 1965.

The ADF4001BRU belongs to Analog Devices' clock generation and PLL synthesizer product line, designed specifically for low-jitter, high-stability reference clock synthesis in telecom infrastructure and precision timing equipment.

FAQ

What is the maximum RF input frequency supported by the ADF4001BRU?

The ADF4001BRU supports RF input frequencies up to 200 MHz under 5 V operation (10–200 MHz range) and up to 165 MHz under 3 V operation (5–165 MHz range). These limits are specified in the Absolute Maximum Ratings and validated in Typical Performance Characteristics (TPC 1). Exceeding these ranges risks degraded phase detector performance and increased reference spurs. The ADF4001BRU's N counter is a 13-bit binary divider (1–8191), so actual usable VCO frequency depends on selected N value and loop filter design.

How does the ADF4001BRU implement FastLock mode, and what configuration is required?

The ADF4001BRU implements FastLock via two modes controlled by F4/F5 bits in the function latch. FastLock Mode 1 switches charge pump current to Setting 2 when CP gain bit (G1) in the N counter latch is set to 1 and reverts on G1=0. FastLock Mode 2 auto-reverts after a timeout period (3–63 PFD cycles) defined by TC4–TC1 bits. Both require CPI1–CPI3 and CPI4–CPI6 programmed for distinct current values. The ADF4001BRU must be configured with CE high and PD2=1 for synchronous activation.

Can the ADF4001BRU operate with a 3.3 V AVDD/DVDD and 5 V VP simultaneously?

Yes, the ADF4001BRU explicitly supports AVDD/DVDD = 3.3 V and VP = 5 V simultaneously, as stated in the Absolute Maximum Ratings (VP ≤ 6.0 V, AVDD ≤ VP) and confirmed in the Specifications table (VP = AVDD/6.0 V). This configuration enables use of wide-tuning-range VCXOs requiring up to 5 V control voltage while maintaining 3.3 V logic compatibility. The ADF4001BRU's charge pump output (CP) and internal analog circuitry are referenced to VP, ensuring full dynamic range.

What are the key differences between digital and analog lock detect outputs on the ADF4001BRU?

The ADF4001BRU provides two lock detect outputs via MUXOUT: digital lock detect is a CMOS active-high signal asserting after 3 or 5 consecutive PFD cycles with phase error <15 ns; analog lock detect is an N-channel open-drain output requiring a 10 kΩ external pull-up, generating narrow low-going pulses when locked. Digital lock detect suits FPGA/ASIC status monitoring; analog lock detect enables analog comparator-based fault detection. Both are independently configurable and remain functional during hardware power-down if CE is not asserted.

Is the ADF4001BRU pin-compatible with the ADF4110/ADF4111/ADF4112/ADF4113 series?

The ADF4001BRU is hardware compatible-not pin-compatible-with the ADF4110/ADF4111/ADF4112/ADF4113 series, as stated in the Features section. While they share identical 3-wire serial interface timing and similar functional blocks (PFD, charge pump, counters), pin assignments differ: ADF411x devices integrate LDOs and omit RSET/VP pins, relocating functions like MUXOUT and SDOUT. The ADF4001BRU's TSSOP-16 footprint cannot substitute directly without PCB redesign, though register-level programming is largely transferable for basic PLL setup.

ADF4001BRU Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc.

Series:: -

Package/Case:: 16-TSSOP (0.173", 4.40mm Width)

Packaging:: Tube

Product Status:: Obsolete

Programmable:: Not Verified

Type:: Clock Generator (RF)

PLL:: Yes

Input:: CMOS, TTL

Output:: Clock

Number of Circuits:: 1

Ratio - Input:Output:: 2:1

Differential - Input:Output:: Yes/No

Frequency - Max:: 200MHz

Divider/Multiplier:: Yes/No

Voltage - Supply:: 2.7V ~ 5.5V

Operating Temperature:: -40°C ~ 85°C

Mounting Type:: Surface Mount

Grade:: -

Qualification:: -

Supplier Device Package:: 16-TSSOP

ADF4001BRU FAQ

1.How can I place an order for ADF4001BRU through Aetrix?

Please submit a Request for Quotation (RFQ) for ADF4001BRU on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for ADF4001BRU reliable?

The price and inventory of ADF4001BRU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADF4001BRU is usually 5 days.

3.What payment methods are accepted for ADF4001BRU?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADF4001BRU transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ADF4001BRU?

ADF4001BRU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ADF4001BRU order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for ADF4001BRU?

For technical support, including ADF4001BRU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADF4001BRU requirements.

6.How does Aetrix verify that ADF4001BRU is sourced from the original manufacturer or authorized distributors?

All ADF4001BRU products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ADF4001BRU meets industry standards.

7.What is the process for return or replacement of ADF4001BRU?

All ADF4001BRU units undergo pre-shipment inspection (PSI). If there is an issue with ADF4001BRU, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The ADF4001BRU part is unused and in its original packaging.

Return procedure for ADF4001BRU:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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