ADF4112BRUZ - 3 GHz Integer-N PLL | Analog Devices
Référence : ADF4112BRUZ ✓ ActifADF4112BRUZ Présentation
An integer-N frequency synthesizer belongs to the phase-locked-loop, clock-generation, and RF frequency-generation hierarchy. Its phase-frequency detector compares a divided reference signal with a divided feedback signal, while its programmable counters and dual-modulus prescaler determine the synthesized output frequency. This architecture provides programmable frequency generation for RF local oscillators, up-conversion and down-conversion chains, and other systems requiring a stable output related to a reference clock.
The ADF4112 integrates a low-noise digital phase-frequency detector, a precision charge pump, a programmable reference divider, programmable A and B counters, and a programmable dual-modulus prescaler. These functional blocks allow the output frequency to be established through a serial programming interface. The 3 GHz upper operating frequency supports RF signal chains operating below that limit, while the 2.7 V minimum supply permits use in systems with a 3 V nominal supply.
The ADF4110 family architecture is intended for wireless receiver and transmitter local oscillators. In a transmitter, the synthesizer can generate a programmable local oscillator for RF up-conversion. In a receiver, it can provide the local oscillator used during RF down-conversion. The integer-N approach is particularly useful when the desired frequency relationship to the reference can be represented with integer division ratios and when compact implementation is a priority.
Typical uses include wireless transceivers, RF front ends, local-oscillator modules, frequency-agile test equipment, and communication systems operating below 3 GHz. The 16-pin TSSOP package also allows reuse of PCB layouts designed for compatible members of the ADF4110 family, subject to careful verification of pin functions, register compatibility, prescaler options, and operating limits.
The most important design consideration is the loop-filter and reference-divider implementation. A suitable external loop filter must provide the required phase margin and loop bandwidth for the intended reference and synthesis frequencies. The charge-pump output should be kept short and surrounded by an appropriate ground-return path, while decoupling capacitors should be positioned close to the supply and ground pins.
This page combines the key ADF4112BRUZ operating facts, family-level replacement considerations, verified package information, application guidance, and practical design notes. It is intended to help engineers identify the correct PLL for an RF design and distinguish a true same-footprint option from a merely similar frequency synthesizer.
Alternatives de remplacement direct pour ADF4112BRUZ — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec ADF4112BRUZ (même facteur de forme et même empreinte) — différant par Charge Pump, Mounting Type, Prescaler, A Counter, B Counter.
ADF4112BRU
✅ Remplacement directContactez-nous pour le prix
Voir la fiche technique →ADF4110BRUZ
✅ Remplacement direct ⚠️ Spécifications non vérifiéesContactez-nous pour le prix
Voir la fiche technique →ADF4112BRUZ Spécifications
| Product Type | Single integer-N RF frequency synthesizer |
| Maximum Operating Frequency | 3 GHz |
| Supply Voltage Range | 2.7 V to 5.5 V |
| Nominal Supply Voltage | 3 V |
| Courant d'alimentation | 6.5 mA |
| PLL Type | Integer-N frequency synthesis |
| Channel Count | 1 channel |
| Process Technology | BiCMOS |
| Package Type | 16-pin TSSOP |
| Package Width | 4.40 mm |
| Package Length | 0.173 inch |
| Type de montage | Surface mount |
| Phase-Frequency Detector | Low-noise digital PFD |
| Charge Pump | Precision charge pump |
| Counter Configuration | Programmable A and B counters |
| Prescaler | Programmable dual-modulus P/P+1 prescaler |
| Reference Divider | Programmable |
| Statut RoHS | RoHS |
Guide de configuration des broches du ADF4112BRUZ 0.173 inch
Configuration des broches du ADF4112BRUZ (boîtier 0.173 inch). La numérotation des broches, les fonctions et les schémas de connexion sont définis dans la fiche technique du fabricant. Consultez-la pour l'empreinte exacte et les directives de soudage.
Aucune donnée de brochage détaillée disponible pour ADF4112BRUZ.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
ADF4112BRUZ convient pour 6 applications: Wireless Transmitter Local Oscillator, Wireless Receiver Down-Conversion, RF Up-Conversion Mixer, Frequency-Agile Test Instrument, Industrial RF Monitoring System, Portable RF Communication Module.
Wireless Transmitter Local Oscillator
The ADF4112BRUZ fits a wireless transmitter local-oscillator stage when the required synthesis range extends to 3 GHz. Its integer-N architecture combines a digital phase-frequency detector, precision charge pump, programmable reference divider, programmable A and B counters, and a dual-modulus prescaler. The 2.7 V to 5.5 V supply range supports 3 V and compatible 5 V RF architectures, while 6.5 mA supply current suits compact RF modules. Designers must verify that the selected prescaler and integer-N ratio can represent every required channel, then calculate the external loop filter for the desired phase margin and settling behavior.
Recommandé
Wireless Receiver Down-Conversion
The ADF4112BRUZ can generate the programmable local oscillator used in a wireless receiver down-conversion chain. Its 3 GHz operating ceiling accommodates RF front ends operating within that range, and the single integer-N synthesizer provides a compact way to derive coherent local-oscillator signals from a reference. The 16-pin TSSOP package supports surface-mount integration, but RF layout remains critical: route the charge-pump output directly to the loop filter, minimize feedback-loop area, and preserve a controlled ground path beneath the sensitive analog and digital return connections.
Recommandé
RF Up-Conversion Mixer
The ADF4112BRUZ is appropriate for an RF up-conversion mixer that requires a programmable local-oscillator signal below 3 GHz. The programmable reference divider, A counter, B counter, and dual-modulus prescaler establish the synthesized output while the phase-frequency detector and charge pump close the control loop. A 2.7 V minimum supply supports low-voltage RF systems, and the 16-pin TSSOP body width of 4.40 mm assists compact placement. The loop filter must be calculated for the actual reference frequency, prescaler, channel spacing, and required settling time rather than copied without verification.
Recommandé
Frequency-Agile Test Instrument
The ADF4112BRUZ can serve as the programmable RF source in a compact frequency-agile test instrument. A single-channel integer-N PLL with a 3 GHz ceiling covers many RF measurement scenarios, while its 2.7 V to 5.5 V supply range allows integration with low-voltage control electronics. For instrument use, choose the reference frequency carefully because it affects divider ratios, phase noise, lock time, and the required loop bandwidth. Keep the reference and feedback routing short, isolate noisy digital programming signals from the charge-pump path, and validate lock performance across every intended output frequency.
Recommandé
Industrial RF Monitoring System
The ADF4112BRUZ is suitable for an industrial RF monitoring system requiring a compact, programmable local oscillator below 3 GHz. Its low 6.5 mA supply current and 2.7 V to 5.5 V operating range are useful for distributed sensing or communication equipment with constrained power and thermal budgets. The integer-N architecture can produce multiple frequencies from a common reference when suitable division ratios are available. Designers should account for reference accuracy, temperature drift, loop bandwidth, and unwanted coupling from digital control lines, particularly when the monitored signal chain uses high-gain amplifiers or narrow channel filters.
Recommandé
Portable RF Communication Module
The ADF4112BRUZ fits a portable RF communication module that derives a local oscillator from a shared reference and can operate below 3 GHz. Its 16-pin TSSOP package supports compact surface-mount assembly, and the 3 V nominal supply aligns with many portable RF systems. Power planning should include the 6.5 mA device current plus charge-pump, reference, and surrounding circuitry rather than treating the IC current as the complete module load. To preserve lock stability, place the loop filter close to the charge-pump output, provide local supply decoupling, and keep programming traces away from sensitive feedback nodes.
Recommandé
Données de référence d'ingénierie pour ADF4112BRUZ — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | ADF4112BRU | ADF4110BRUZ |
|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices |
| Package | 16-TSSOP, 4.40 mm width | 16-TSSOP | 16-TSSOP |
| Product Type | Single integer-N RF PLL | Single integer-N RF PLL | Single integer-N RF PLL |
| Counter Configuration | Programmable A and B counters | Programmable A and B counters | Programmable A and B counters |
Principaux différenciateurs
- Higher supported RF synthesis ceiling within the same footprint (vs ADF4110BRUZ)
- Exact ADF4112 function set with an alternate ordering grade (vs ADF4112BRU)
- Single-channel implementation with integrated prescaler and counters (vs ADF4110BRUZ)
Notes de conception
Place the external loop filter immediately beside the charge-pump output and its ground-return terminal. Keep the charge-pump trace short, avoid routing it beneath noisy digital programming nets, and connect the filter return through a low-impedance ground path. Because the ADF4112BRUZ combines sensitive phase detection and charge-pump circuitry with digital programming functions, this physical separation can reduce susceptibility to injected noise and improve lock stability.
Place the required supply-decoupling network directly at the analog and digital supply pins, with its shortest possible ground connection. The ADF4112BRUZ operates from 2.7 V to 5.5 V and has a stated supply current of 6.5 mA, but total rail demand also includes external circuitry. Confirm the source impedance, capacitor voltage rating, and startup behavior across the full supply range before relying on the nominal 3 V operating point.
Do not treat an ADF4110-family member as interchangeable solely because it uses a 16-pin TSSOP. Verify the prescaler options, maximum synthesis frequency, reference-divider range, counter limits, charge-pump polarity, register map, and device operating-temperature grade. In particular, ADF4112BRUZ reaches 3 GHz, so a lower-frequency family member may not reproduce the intended output even when its package matches.
Keep the reference and RF feedback connections short, use a continuous ground reference, and avoid crossing them with high-speed digital programming traces wherever possible. Select a reference frequency that produces workable integer-N ratios for the required channels and supports the intended prescaler. Validate lock range, phase margin, and spurious performance in the final board because component placement and return paths can materially change loop behavior.
Informations de conformité
RoHS information appears in the manufacturer ordering comparison listing. No specific AEC-Q100, REACH, halogen-free, or conflict-minerals qualification claim was identified for this ordering code.