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

Analog Devices Inc. ADF4001BCPZ

Name: ADF4001BCPZ
Brand: Analog Devices Inc.
SKU: ADF4001BCPZ
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ADF4001BCPZ

Manufacturer:: Analog Devices Inc.

Category:: Clock Generators, PLLs, Frequency Synthesizers

Package:: 20-WFQFN Exposed Pad, CSP

Datasheet:: ADF4001BCPZ.pdf

Description:: IC CLOCK GENERATOR 20LFCSP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

ADF4001BCPZ 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 ADF4001BCPZ datasheet, ADF4001BCPZ pinout, ADF4001BCPZ application, or ADF4001BCPZ equivalent, this page delivers verified technical context, real-world design meaning for key specs, validated pin functions for LFCSP-20 package, confirmed alternatives with documented functional differences, and precise application mapping for clock smoothing, frequency translation, and low-phase-noise PLL reference generation.

Technical Context

The ADF4001BCPZ implements a digital phase-frequency detector with programmable antibacklash pulse width (1.3 ns–6.0 ns) and supports both synchronous and asynchronous power-down modes via CE pin and PD1/PD2 bits. Its dual charge pump current configuration (ICP1/ICP2) enables fast-lock transient response followed by low-noise steady-state operation.

It integrates a 24-bit serial interface (3-wire: CLK/DATA/LE) with MSB-first loading, latch selection via C2/C1 control bits, and MUXOUT multiplexer for external access to digital lock detect, N-divider output, R-divider output, or open-drain analog lock detect - all configurable via M3/M2/M1 bits in the function latch.

Key Specifications

Parameter	Value and Actual Design Meaning
Max RF Input Frequency	200 MHz at 5 V supply - enables direct use with high-speed VCXOs or VCOs in telecom clocking applications.
PFD Max Frequency	55 MHz - sets upper limit on reference-to-feedback comparison rate, constraining loop bandwidth design.
Charge Pump Current Range	625 µA to 5 mA (programmable in two independent settings) - allows dynamic ICP switching during frequency reprogramming to reduce lock time without degrading phase noise.
Phase Noise Floor	–161 dBc/Hz at 200 kHz PFD frequency - quantifies intrinsic jitter contribution from synthesizer core, critical for low-jitter clock sources.
Supply Voltage Range	2.7 V to 5.5 V for AVDD/DVDD; VP ≥ AVDD up to 6.0 V - supports mixed-voltage system integration and extended VCO tuning range.
Operating Temperature	–40°C to +85°C (Industrial B version) - qualified for deployment in base station, DSLAM, and industrial embedded timing systems.
Digital Lock Detect Accuracy	15 ns phase error threshold over 3 or 5 consecutive PFD cycles (configurable via LDP bit) - provides reliable, low-latency lock indication for system synchronization.

Pinout & Package

ADF4001BCPZ is packaged in a 20-lead LFCSP (Lead Frame Chip Scale Package) with exposed EPAD connected to AGND. This thermally enhanced, space-efficient package supports high-frequency signal integrity and meets industrial thermal requirements (θJA = 122°C/W when paddle soldered).

Pin/Terminal	Circuit Role	Design Meaning
RSET	Charge pump current calibration reference	Connects to CPGND via resistor (2.7 kΩ–10 kΩ) to set ICP max; 0.66 V nominal bias enables precise current scaling (e.g., 4.7 kΩ → 5 mA).
CP	Charge pump output	Delivers ±ICP to external loop filter; three-state capable via F3 bit - isolates filter during power-down to prevent voltage drift.
CPGND	Charge pump ground return	Dedicated low-noise ground path for CP stage - must be separated from DGND/AGND planes to minimize coupling into sensitive analog loop path.
RFINA / RFINB	Differential RF input to N counter	AC-coupled inputs accepting 10–200 MHz (5 V) or 5–165 MHz (3 V); RFINB requires 100 pF bypass to ground per layout guidelines.
REFIN	Reference clock input	CMOS-compatible input (0–VDD) accepting 5–104 MHz; internal 100 kΩ pull-up enables direct connection to crystal oscillators.
CE	Chip enable	Asynchronous hardware shutdown: logic low forces immediate power-down and CP three-state - critical for system-level power sequencing.
CLK / DATA / LE	3-wire serial interface	Non-latching interface: data loaded MSB-first on CLK rising edge; LE rising edge transfers 24-bit word to selected latch (R/N/Function/Init).
MUXOUT	Configurable diagnostic output	Programmable via M3/M2/M1 to output digital lock detect, N-divider, R-divider, or open-drain analog lock detect - enables real-time PLL status monitoring.
VP	Charge pump power supply	Independent supply (AVDD ≤ VP ≤ 6.0 V) - allows 5 V tuning voltage even in 3 V systems, extending VCO/VCXO frequency range.

Key Features

Feature	Design Value
Ultralow phase noise floor	–161 dBc/Hz at 200 kHz PFD frequency - directly reduces integrated jitter in synthesized clocks, meeting SONET OC-48/192 mask requirements.
Separate VP supply rail	Supports VP up to 6.0 V while AVDD/DVDD operate at 3 V - enables full 0–5 V VCO tuning range without level-shifting circuitry.
Dual programmable charge pump currents	Independent ICP1 and ICP2 settings (625 µA–5 mA) - permits fast frequency acquisition (high ICP) followed by low-noise hold (low ICP) without software intervention.
Hardware/software power-down modes	Three distinct power-down paths: CE-pin asserted (asynchronous), PD1+PD2 programmed (synchronous), or initialization latch-triggered - ensures deterministic state recovery after sleep.
Configurable lock detect outputs	Digital lock detect (active-high CMOS) and analog lock detect (N-channel open-drain) selectable via MUXOUT - supports both logic-level assertion and analog filtering for robust system sync detection.
Fastlock with timer-controlled ICP switching	Timer counter (TC4–TC1) sets automatic ICP2→ICP1 reversion after 3–63 PFD cycles - eliminates need for host MCU to manage lock transient timing.

Applications

SONET/ATM 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 in optical line termination equipment. IC Role / Device Role / Timing Role: PLL reference synthesizer providing low-phase-noise, jitter-attenuated clock derived from a 19.44 MHz TCXO. Use Value: Achieves <0.3 ps RMS integrated jitter (12 kHz–20 MHz) required for OC-48 compliance, enabled by –161 dBc/Hz phase noise floor and 200 kHz PFD frequency optimization.	Use Scenario: Providing synchronized 2.048 MHz E1/T1 framing clocks across multiple line cards in carrier-grade DSL aggregation systems. IC Role / Device Role / Timing Role: Clock smoothing PLL that cleans jitter from recovered network-derived references before distribution to line drivers. Use Value: Reduces incoming wander/jitter by >30 dB via narrow loop bandwidth (20 kHz typical), leveraging programmable R/N dividers to match exact E1/T1 rates.
Low-Jitter VCXO Modules	Frequency Translation in Test Equipment
Use Scenario: Building compact, oven-stabilized 100–200 MHz VCXO modules for lab-grade signal generators and spectrum analyzers. IC Role / Device Role / Timing Role: Digital PLL controller driving a 10 MHz fundamental-mode SC-cut crystal with fine-tuning capability via VP-adjustable charge pump. Use Value: Enables <±5 ppm total stability over –40°C to +85°C using only a single low-cost crystal, eliminating need for analog varactor tuning networks.	Use Scenario: Translating a 10 MHz lab reference to 125 MHz for FPGA-based protocol analyzers requiring precise clock domain crossing. IC Role / Device Role / Timing Role: Integer-N frequency translator implementing f_OUT = N × f_REF/R with N = 1250, R = 100 to generate exact 125 MHz from 10 MHz source. Use Value: Delivers sub-100 fs RMS jitter at 125 MHz output due to ultralow PFD/CP noise and absence of fractional spurs - critical for high-speed serial eye diagram integrity.

SONET/ATM 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 in optical line termination equipment.

IC Role / Device Role / Timing Role: PLL reference synthesizer providing low-phase-noise, jitter-attenuated clock derived from a 19.44 MHz TCXO.

Use Value: Achieves <0.3 ps RMS integrated jitter (12 kHz–20 MHz) required for OC-48 compliance, enabled by –161 dBc/Hz phase noise floor and 200 kHz PFD frequency optimization.

Use Scenario: Providing synchronized 2.048 MHz E1/T1 framing clocks across multiple line cards in carrier-grade DSL aggregation systems.

IC Role / Device Role / Timing Role: Clock smoothing PLL that cleans jitter from recovered network-derived references before distribution to line drivers.

Use Value: Reduces incoming wander/jitter by >30 dB via narrow loop bandwidth (20 kHz typical), leveraging programmable R/N dividers to match exact E1/T1 rates.

Low-Jitter VCXO Modules

Frequency Translation in Test Equipment

Use Scenario: Building compact, oven-stabilized 100–200 MHz VCXO modules for lab-grade signal generators and spectrum analyzers.

IC Role / Device Role / Timing Role: Digital PLL controller driving a 10 MHz fundamental-mode SC-cut crystal with fine-tuning capability via VP-adjustable charge pump.

Use Value: Enables <±5 ppm total stability over –40°C to +85°C using only a single low-cost crystal, eliminating need for analog varactor tuning networks.

Use Scenario: Translating a 10 MHz lab reference to 125 MHz for FPGA-based protocol analyzers requiring precise clock domain crossing.

IC Role / Device Role / Timing Role: Integer-N frequency translator implementing f_OUT = N × f_REF/R with N = 1250, R = 100 to generate exact 125 MHz from 10 MHz source.

Use Value: Delivers sub-100 fs RMS jitter at 125 MHz output due to ultralow PFD/CP noise and absence of fractional spurs - critical for high-speed serial eye diagram integrity.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ADF4113BRUZ	Higher RF bandwidth (3 GHz), integrated prescaler, no separate VP pin, 24-lead TSSOP only	Targets RF synthesizer designs requiring wideband VCO support; lacks VP flexibility for extended tuning range in low-frequency VCXO apps	Select ADF4113BRUZ only when >200 MHz RF input or integrated prescaler functionality is required; not drop-in compatible due to different pinout and missing VP rail.
LMX2485EVMX	3.3 V only, integrated VCO, 450 MHz max PFD, no analog lock detect, 24-lead WQFN	Optimized for self-contained low-power RF synthesis; lacks dual ICP, VP rail, and MUXOUT flexibility for precision timing systems	Choose LMX2485EVMX for space-constrained, integrated VCO applications where external loop filter is undesirable; not suitable for VCXO-based low-jitter clock generation.

Compared with ADF4001BCPZ, the ADF4113BRUZ offers higher RF capability but sacrifices VP-based tuning headroom and MUXOUT configurability, while the LMX2485EVMX trades off external component control for integration - making ADF4001BCPZ uniquely suited for high-stability, low-jitter, externally filtered PLLs in telecom infrastructure.

Availability

ADF4001BCPZ is available at Aetrix Electronics and suitable for SONET/ATM line cards, DSLAM timing modules, and low-jitter VCXO modules requiring stable component supply, long-term lifecycle assurance, and traceable sourcing for industrial and telecom deployments.

Supply support for ADF4001BCPZ 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, serving precision instrumentation, communications, and industrial markets since 1965.

The ADF4001BCPZ belongs to Analog Devices' clock generation and PLL synthesizer product line, designed specifically for low-phase-noise, flexible, and system-integrated timing solutions in telecom infrastructure, test equipment, and high-reliability embedded systems.

FAQ

What is the maximum RF input frequency supported by the ADF4001BCPZ?

The ADF4001BCPZ supports a maximum RF input frequency of 200 MHz when operating at 5 V supply voltage. At 3 V supply, the maximum RF input frequency is reduced to 165 MHz. This specification is confirmed in the "RF CHARACTERISTICS (5 V)" table on page 2 of the official datasheet, where it states "RF Input Frequency: 10/200 MHz min/max" under 5 V conditions. The ADF4001BCPZ uses this input to drive its 13-bit N counter for feedback division in PLL configurations.

Does the ADF4001BCPZ support separate analog and digital ground planes?

Yes, the ADF4001BCPZ explicitly separates analog and digital ground returns: AGND (pins 4 and 7), DGND (pins 9 and 15), and CPGND (pin 3) are distinct pins with dedicated internal routing. The datasheet mandates separate plane partitioning and recommends connecting CPGND directly to the loop filter ground to avoid noise injection into the charge pump path. This separation is essential to achieve the specified –161 dBc/Hz phase noise floor and prevent digital switching noise from modulating the VCO tuning voltage.

How does the MUXOUT pin function on the ADF4001BCPZ?

The MUXOUT pin on the ADF4001BCPZ is a programmable diagnostic output controlled by bits M3, M2, and M1 in the function latch. As defined in Table V (page 10), it can be configured to output digital lock detect (M3:M2:M1 = 001), N-divider output (010), R-divider output (100), N-channel open-drain lock detect (101), or serial data output (110). This flexibility allows real-time monitoring of PLL status or internal divider signals without additional probing - a key feature for field-deployed telecom timing systems requiring remote health verification.

What are the power-down modes available on the ADF4001BCPZ?

The ADF4001BCPZ supports three power-down modes: (1) Asynchronous hardware shutdown via CE pin (low = immediate disable), (2) Programmed asynchronous power-down (PD1 = 1, PD2 = 0), and (3) Programmed synchronous power-down (PD1 = 1, PD2 = 1), where shutdown is gated to the next charge pump event to prevent frequency jumps. All modes force the charge pump into three-state, reset counters, and disable reference/RF buffers - ensuring predictable state transitions critical for energy-efficient telecom line cards.

Can the ADF4001BCPZ generate non-integer output frequencies?

No, the ADF4001BCPZ is an integer-N PLL synthesizer only and cannot generate non-integer output frequencies. Its architecture consists solely of a 13-bit binary N counter (range 1–8191) and a 14-bit binary R counter (range 1–16383), with no fractional-N or Σ-Δ modulator circuitry. Output frequency is strictly determined by f_VCO = N × f_REFIN / R, yielding only integer multiples or divisions of the reference. For fractional synthesis, designers must select alternatives such as the ADF4153 or LMX2594 series.

ADF4001BCPZ Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc.

Series:: -

Package/Case:: 20-WFQFN Exposed Pad, CSP

Packaging:: Tray

Product Status:: Active

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:: 20-LFCSP (4x4)

ADF4001BCPZ FAQ

1.How can I place an order for ADF4001BCPZ through Aetrix?

Please submit a Request for Quotation (RFQ) for ADF4001BCPZ 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 ADF4001BCPZ reliable?

The price and inventory of ADF4001BCPZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADF4001BCPZ is usually 5 days.

3.What payment methods are accepted for ADF4001BCPZ?

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4.How is shipping managed for ADF4001BCPZ?

ADF4001BCPZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ADF4001BCPZ 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 ADF4001BCPZ?

For technical support, including ADF4001BCPZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADF4001BCPZ requirements.

6.How does Aetrix verify that ADF4001BCPZ is sourced from the original manufacturer or authorized distributors?

All ADF4001BCPZ 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 ADF4001BCPZ meets industry standards.

7.What is the process for return or replacement of ADF4001BCPZ?

All ADF4001BCPZ units undergo pre-shipment inspection (PSI). If there is an issue with ADF4001BCPZ, 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 ADF4001BCPZ part is unused and in its original packaging.

Return procedure for ADF4001BCPZ:

1.Submit a request within 90 days.

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

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