ADF4212BRU - Dual Integer-N 0.5/1.2GHz PLL | Analog Devices
部品番号: ADF4212BRU ✓ 生産中ADF4212BRU 概要
A frequency synthesizer is a timing and control component that locks an output frequency to a stable reference by comparing a divided feedback signal with a reference oscillator. The phase-locked-loop, or PLL, hierarchy includes frequency synthesizer -> clock generator -> clock and timing IC -> integrated circuit. The ADF4212BRU occupies the RF/IF end of that hierarchy, where integer-N feedback division and phase comparison generate a controllable tuning voltage for an external voltage-controlled oscillator or frequency synthesizer core.
The dual-channel architecture allows two independent RF or IF synthesis paths within one device. Separate charge-pump supply support permits extended tuning voltage where the system requires greater tuning range. According to the manufacturer product page and indexed datasheet material, the ADF4212 family supports programmable charge-pump currents and dual-modulus prescaling. These controls work with external loop-filter components, reference dividers, and feedback dividers to determine lock behavior, phase noise, and channel spacing.
The ADF4212BRU is intended for RF and IF signal chains that require multiple related frequencies from a common reference. Typical uses include communications equipment, frequency conversion blocks, RF test and measurement systems, and instrumentation requiring precise phase alignment. The integer-N architecture favors channels that can be represented by integer division ratios relative to the reference frequency.
Designers should account for the 2.7 V to 5.5 V supply range, preserve adequate headroom for the core, charge-pump, and external oscillator interfaces, and design the loop filter around the selected prescaler, charge-pump current, reference frequency, and required phase-noise performance. Printed-board layout must minimize reference and feedback-node noise coupling because both directly influence synthesized signal purity.
This page consolidates verified manufacturer and distributor information, practical implementation guidance, procurement details, and a transparent assessment of replacement options. It also distinguishes confirmed product attributes from parameters that require checking in the current manufacturer datasheet before a board-level design is released.
ドロップイン代替品: ADF4212BRU — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
この製品に利用可能なドロップイン代替品はありません。
代替品をリクエストADF4212BRU 仕様
| Device Type | Dual RF/IF PLL frequency synthesizer |
| PLL Architecture | Integer-N |
| Channel Rates | 0.5 GHz/1.2 GHz |
| Number of Synthesizer Channels | 2 |
| Supply Voltage Range | 2.7 V to 5.5 V |
| Core Supply Voltage | 3 V |
| Charge Pump Supply | Separate VP supply |
| Prescaler | Programmable dual-modulus prescaler |
| Prescaler Inputs | RF and IF |
| Charge Pump Current | Programmable |
| Maximum Clock Input Frequency | 2.7 GHz |
| パッケージ | 20-pin TSSOP |
| Package Width | 4.40 mm |
| 実装タイプ | Surface mount |
| Shipping Container | Tube |
ADF4212BRU 4.40 mm ピン配置ガイド
ADF4212BRU (4.40 mm パッケージ) のピン配置。 ピン番号、機能、接続図はメーカーのデータシートで定義されています。正確なフットプリントとはんだ付けのガイドラインについては、データシートを参照してください。
詳細なピン配置データはありません: ADF4212BRU.
詳細は データシート をご参照ください。
主な用途
ADF4212BRU の用途: 6 件s: RF Communications Frequency Conversion, IF Signal-Chain Frequency Generation, RF Test and Measurement Equipment, Instrumentation Signal Conditioning, Industrial RF Control Systems, Clock and Timing Backplane.
RF Communications Frequency Conversion
The ADF4212BRU fits dual RF and IF synthesis blocks in communications equipment that derives related frequencies from a common reference. Its integer-N divider architecture and programmable dual-modulus prescaler allow the feedback ratio to be selected for the required channel plan, while programmable charge-pump current provides a control point for the external loop-filter design. The two synthesizer channels can serve separate RF and IF paths, reducing duplicated circuitry when both functions require accurate phase relationships. According to the manufacturer product information, the device supports channel rates of 0.5 GHz/1.2 GHz and a 2.7 V to 5.5 V supply. Designers must confirm each prescaler mode, reference divider, and lock-band relationship against the desired RF input range before finalizing the frequency map.
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IF Signal-Chain Frequency Generation
The ADF4212BRU is appropriate for generating an IF carrier in a receiver, transmitter, or signal-processing chain where a stable reference is available. The RF/IF-oriented prescaler and programmable charge-pump current support implementation around an external voltage-controlled oscillator and loop filter. Using the dual-channel capability can provide coherent RF and IF outputs when the system requires related frequencies with controlled phase. The indexed family information identifies 0.5 GHz/1.2 GHz channel rates and integer-N operation, making exact frequency planning essential. A practical design must calculate the integer feedback ratio, determine permissible prescaler combinations, select charge-pump current for the target loop bandwidth, and verify that the resulting tuning voltage stays within both the charge-pump and oscillator limits.
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RF Test and Measurement Equipment
The ADF4212BRU can provide programmable conversion and reference-related frequencies in RF instrumentation where multiple coherent outputs are useful. Two synthesizer paths permit one channel to generate a test tone while the other supports an LO-related function, and the common reference can improve repeatability between channels. Integer-N operation is practical when the reference and required output frequencies produce an acceptable integer feedback ratio. For sensitive measurement accuracy, however, phase noise, reference spurs, lock behavior, and oscillator tuning-range specifications must be evaluated from the complete datasheet. The available verified material confirms programmable charge-pump currents, dual-modulus prescalers, and a 2.7 V to 5.5 V supply, but it does not provide phase-noise or spur figures for tabulation.
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Instrumentation Signal Conditioning
The ADF4212BRU can supply coherent clock or conversion signals to precision instrumentation when the system needs programmable RF or IF frequencies rather than a fixed oscillator. The dual-channel arrangement is valuable for synchronized excitation and reference generation, while programmable charge-pump current allows the loop filter to be tuned around the required settling behavior. Designers should preserve the relationship between the reference frequency and the integer feedback divider, because fractional channel placement is not available in this integer-N architecture. The verified product snippets identify 0.5 GHz/1.2 GHz rates, separate charge-pump supply support, and 3 V system operation. Board qualification should therefore include phase-noise, spur, capture-range, lock-time, and temperature-drift measurements using the external reference and voltage-controlled oscillator selected for the system.
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Industrial RF Control Systems
The ADF4212BRU can support programmable RF or IF sources in industrial systems that coordinate sensors, actuators, transmitters, or receivers from a shared reference. Its dual-channel structure can lower the component count when two related frequencies are required, while the programmable prescaler and charge-pump settings permit adaptation across different channel plans. The 2.7 V to 5.5 V operating range supports integration with 3 V and 5 V system architectures identified in the product information. Industrial designs should account for temperature drift, reference-clock quality, loop-filter tolerances, and supply-noise coupling. Because the verified excerpts do not provide the complete operating-temperature range or automotive qualification status, the current Analog Devices datasheet and product page should be checked before use in safety-related or harsh-environment equipment.
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Clock and Timing Backplane
ADF4212BRU can be used where a board needs two synchronized RF or IF-derived timing signals rather than a conventional low-frequency clock. The common reference and dual architecture help maintain a defined relationship between the two outputs, which can simplify calibration in communications, conversion, and specialized timing systems. Programmable charge-pump current gives the designer control over loop dynamics, but the external filter and oscillator become part of the complete synthesizer performance. According to the verified family information, separate VP supply support allows extended tuning voltage, while the core supports 3 V systems. Layout should isolate the reference input and feedback divider from noisy clocks and digital return currents. Firmware must also coordinate register writes and lock-status checks so both channels settle predictably before measurements or transmissions begin.
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おすすめ製品の概要
エンジニアリング参考データ: ADF4212BRU — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
設計ノート
Do not treat a related ADF4212 ordering code as a drop-in replacement without checking the manufacturer ordering guide. The verified cross-reference results specifically identify ADF4212BRUZ and ADF4212BRURL as possible related listings but state that datasheet and pinout checks are required. Compare the complete pin table, electrical limits, temperature grade, and exposed-terminal handling before substituting any suffix on an assembled production board.
Keep the reference input, prescaler input, and feedback-divider path compact and route them away from switching-node and digital return currents. A reference signal contaminated by board noise can degrade synthesized phase noise and create unwanted modulation. Use a controlled ground return and place the loop-filter components near the charge-pump output; the exact grounding topology and high-frequency isolation should follow the layout and application guidance in the current Analog Devices datasheet.
Budget the 2.7 V to 5.5 V operating range across the core and charge-pump rails, and confirm that the separate VP supply can support the tuning range required by the external oscillator. The separate VP connection can extend tuning voltage, but it also requires suitable decoupling and an operating limit appropriate to the chosen external voltage-controlled oscillator. Verify absolute maximum voltages and sequencing requirements in the manufacturer datasheet before applying power.
Calculate the complete loop filter using the selected prescaler mode, charge-pump current, reference frequency, phase-noise target, and allowed lock time rather than copying a generic component set. Because the device is an integer-N architecture, the output frequency must be compatible with the integer feedback ratio allowed by the selected prescaler. Review reference-divider and feedback-divider values as part of spur analysis, because divider settings materially affect the synthesized signal.
コンプライアンス情報
The supplied verified excerpts do not explicitly state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. AEC-Q100 is shown as unknown rather than not_applicable because automotive qualification was not established by the available data.
