ADF4111BCPZ - 1.4 GHz RF PLL Synthesizer | Analog Devices
Teilenummer: ADF4111BCPZ ✓ AktivADF4111BCPZ Übersicht
An RF PLL frequency synthesizer generates an output locked to a stable reference signal. A phase-frequency detector compares the divided feedback signal with the divided reference, while the charge pump and loop filter convert phase error into a control voltage for the prescaler and output stage. In the ADF4110 family, this architecture supports integer-N frequency synthesis for coherent RF signal generation and frequency translation.
The ADF4111BCPZ combines programmable division with a maximum listed operating frequency of 1.4 GHz. The reference path includes a programmable reference divider, while programmable A and B counters and a dual-modulus P/P+1 prescaler establish the integer-N feedback ratio. These controls allow the same synthesizer architecture to serve multiple channels and output frequencies without changing the RF front-end hardware.
The device's low-noise digital phase-frequency detector supports stable lock behavior in systems where phase noise and reference quality are important. The precision charge-pump current is a key loop-design parameter because it works with the external loop filter to establish loop bandwidth, damping, lock time, and reference-spur performance. Component tolerances and charge-pump current must be considered together when setting lock bandwidth.
Typical applications include wireless receiver and transmitter local oscillators, up-converter and down-converter reference planes, instrumentation equipment, and other RF systems requiring a programmable, phase-locked output. The 20-WFQFN exposed-pad package supports compact surface-mount layouts, although careful thermal and grounding layout remains necessary.
For a new design, place the reference and feedback components close to their associated pins, use a symmetrical RF output path, and connect the exposed pad to a low-impedance ground plane. Validate loop-filter component values, reference-divider ratios, and lock performance across the intended frequency range and temperature range before production release.
This product overview combines the verified device identity, package information, family architecture, and application context with practical guidance for PLL layout and integration. It also identifies where replacement decisions require a package- and pin-level review rather than frequency capability alone.
Drop-in-Alternativen für ADF4111BCPZ – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Varianten dieser Serie
Modelle derselben Serie, die drop-in-kompatibel sind mit ADF4111BCPZ (gleiche Bauform und Footprint) – abweichend in A Counter Width, B Counter Width, Charge Pump, Phase-Frequency Detector.
Für dieses Produkt sind keine Drop-in-Alternativen verfügbar.
Alternativen anfordernADF4111BCPZ Technische Daten
| Product Type | RF PLL frequency synthesizer |
| Maximum Listed Frequency | 1.4 GHz |
| Alternative Listed Maximum Frequency | 1.2 GHz |
| Number of Synthesizer Channels | 1 |
| Phase-Locked Loop | Yes |
| Prescaler Type | Dual-modulus P/P+1 |
| A Counter Width | 6 bit |
| B Counter Width | 13 bit |
| Reference Divider | Programmable |
| Phase-Frequency Detector | Low-noise digital type |
| Charge Pump | Precision type |
| Input Signal Type | CMOS or TTL |
| Output Signal Type | Clock output |
| Gehäuse | 20-lead WFQFN with exposed pad |
| Montageart | Surface mount |
ADF4111BCPZ 20-lead wfqfn with exposed pad Pinbelegungsleitfaden
Pinbelegung für ADF4111BCPZ (20-lead wfqfn with exposed pad-Gehäuse). Pin-Nummerierung, Funktionen und Anschlussdiagramme sind im Herstellerdatenblatt definiert. Entnehmen Sie diesem den genauen Footprint und Lötrichtlinien.
Keine detaillierten Pinbelegungsdaten verfügbar für ADF4111BCPZ.
Siehe die Datenblatt für die vollständige Pin-Konfiguration.
Typische Anwendungen
ADF4111BCPZ ist geeignet für 6 Anwendungs: Wireless Transmitter Local Oscillator, Wireless Receiver Down-Converter, RF Up-Converter Reference, Frequency-Hop Communication System, RF Test and Measurement Instrument, Industrial RF Signal Generator.
Wireless Transmitter Local Oscillator
The ADF4111BCPZ suits a programmable wireless transmitter local oscillator requiring an integer-N RF PLL with a listed maximum frequency of 1.4 GHz. According to the Analog Devices ADF4111 family description, the device is intended for local-oscillator implementation in transmitter and receiver up-conversion and down-conversion paths. Its programmable reference divider, 6-bit A counter, 13-bit B counter, and dual-modulus P/P+1 prescaler provide the synthesis ratio. The designer must select loop-filter values for the intended reference and RF frequencies, preserve a clean reference path, and verify lock range, phase noise, and output power across temperature.
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Wireless Receiver Down-Converter
ADF4111BCPZ can generate the programmable local-oscillator signal required by a wireless receiver down-conversion stage when the operating plan fits its 1.4 GHz maximum rating. The low-noise digital phase-frequency detector and precision charge pump form the core of the integer-N synthesis loop, while the programmable reference divider and counters establish the required division ratio. Place the loop filter close to the charge-pump and phase-detector connections, and isolate the reference trace from RF and digital return paths. Validate reference spur behavior and acquisition performance over the required signal range rather than relying only on nominal lock conditions.
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RF Up-Converter Reference
The ADF4111BCPZ is appropriate for an RF up-converter reference when the converter requires a programmable, phase-locked source rather than a free-running oscillator. Its integer-N architecture allows the output frequency to be established from a stable reference through programmable division, A and B counters, and a dual-modulus prescaler. With a 1.4 GHz listed maximum, the design must remain within the device's RF operating limits and account for the prescaler constraints associated with the desired output. Route the RF output as a controlled impedance network and keep the reference and loop-filter components physically separated from high-current switching nodes.
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Frequency-Hop Communication System
ADF4111BCPZ can support channel selection in a frequency-hopping communication system when the required synthesis ratios fit the 6-bit A counter, 13-bit B counter, programmable reference divider, and dual-modulus prescaler. The phase-frequency detector and precision charge pump form the error-detection and correction path, while an external loop filter determines acquisition time, damping, and reference-spur behavior. Channel-change requirements should be translated into worst-case lock-time and reference-spur limits during loop design. The PCB must separate the reference input, feedback input, RF output, and ground return sufficiently to reduce modulation of the synthesized carrier.
Empfohlen
RF Test and Measurement Instrument
ADF4111BCPZ can provide a programmable local-oscillator source for RF test and measurement equipment that requires repeatable frequency generation referenced to an external standard. The integer-N feedback structure allows multiple frequencies to be derived through programmed counter and divider values rather than through a separate synthesizer for every channel. For instrument-grade performance, specify the reference oscillator, loop bandwidth, charge-pump current, output matching, and isolation requirements carefully. Verify phase noise, spurious signals, lock time, and amplitude stability with the final reference and loop-filter implementation rather than evaluating the synthesizer independently.
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Industrial RF Signal Generator
ADF4111BCPZ is suitable for a compact industrial RF signal-generation module when the output frequency is within its 1.4 GHz listed maximum and integer-N synthesis is sufficient. Its programmable reference divider, counter architecture, and dual-modulus prescaler permit multiple output plans from a common reference. The design should include stable reference routing, a loop filter optimized for settling requirements, and controlled RF output impedance. For factory or field equipment, validate lock behavior, phase noise, temperature drift, and interference rejection in the complete enclosure because the PLL performance depends on reference quality and PCB grounding as well as the IC itself.
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Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für ADF4111BCPZ – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt |
|---|---|
| Brand | Analog Devices |
| Package | 20-lead WFQFN with exposed pad |
| Product Type | RF PLL frequency synthesizer |
| Maximum Listed Frequency | 1.4 GHz |
| Number of Channels | 1 |
| Synthesis Architecture | Integer-N |
| A Counter | 6 bit |
| B Counter | 13 bit |
| Reference Divider | Programmable |
| Prescaler | Dual-modulus P/P+1 |
| Phase-Frequency Detector | Low-noise digital type |
| Charge Pump | Precision type |
Wichtigste Unterscheidungsmerkmale
- Single-channel integer-N RF synthesis architecture (vs. ADF4113BCPZ)
- Programmable integer-N divider architecture (vs. ADF4110BCPZ)
- Dedicated RF PLL function in a compact 20-lead package (vs. AD4111BCPZ)
Designhinweise
Place the reference-input, feedback-input, and loop-filter components close to their associated ADF4111BCPZ pins. Keep the exposed pad tied to a continuous, low-impedance ground plane and return RF and digital currents without sharing narrow paths with the reference trace. The PLL can function correctly with nominal component values while still showing unexpected reference spurs or lock variation if grounding and coupling are not controlled.
Route the 1.4 GHz-class RF output as a controlled-impedance connection when the board stack-up and receiver design permit it. Avoid long exposed stubs, abrupt width changes, and sharp turns near the device. Keep the loop filter and feedback network away from this output path. RF output power, return loss, and unintended coupling should be checked on the assembled board because package and lead geometry can create parasitic resonance.
Do not treat ADF4110BCPZ, ADF4113BCPZ, or other family members as automatic drop-in replacements merely because they use related packages or appear in comparison tools. Confirm lead assignments, maximum RF frequency, reference-divider range, prescaler operation, programming registers, and exposed-pad requirements for each exact MPN. ADF4111BCPZ is also easy to confuse with the similarly named AD4111BCPZ, which is an ADC rather than an RF PLL.
Use a clean reference and adequately decoupled supply rails, and follow the manufacturer's recommended component values and grounding arrangement. Loop behavior depends on supply noise, reference phase noise, charge-pump current, and loop-filter tolerances. Evaluate acquisition and phase-noise performance with all of those elements populated on the production board; a bench calculation alone does not capture board coupling or component parasitics.
Compliance-Informationen
Compliance status was not stated in the verified product-page and distributor information. AEC-Q100 is not applicable because this product is an RF frequency-synthesizer IC rather than an automotive-qualified device.
