ADF4002BCPZ - 400 MHz PLL Frequency Synthesizer | Analog Devices
N.º da peça: ADF4002BCPZ ✓ AtivoADF4002BCPZ Visão geral
A PLL frequency synthesizer is a timing-control integrated circuit that locks an output frequency to a stable reference frequency. Its phase-frequency detector compares the divided feedback signal with the reference signal, while the charge pump converts phase error into a tuning voltage for an external voltage-controlled oscillator or voltage-controlled crystal oscillator. In the broader semiconductor hierarchy, the ADF4002 belongs to the clock and timing IC family and ultimately to the PLL and frequency-synthesizer category.
The ADF4002 integrates a low-noise digital phase-frequency detector, a precision charge pump, a programmable reference divider, and a programmable N divider. According to the Analog Devices product page, the 14-bit reference counter supports selectable reference-input frequencies. Programmable charge-pump currents give the circuit additional control when optimizing loop behavior, reference spur performance, and phase noise for a particular synthesizer implementation.
The 400 MHz input bandwidth makes the ADF4002 relevant to wireless receiver and transmitter local-oscillator paths, especially up-conversion and down-conversion stages. Its architecture supports integer-N frequency synthesis. The separate VP charge-pump supply is useful when the required oscillator tuning range exceeds the normal operating range of the main power rail, while the 3.3 V supply architecture supports compact RF and communications systems.
Typical uses include wireless transceiver local oscillators, receiver and transmitter up-converters and down-converters, frequency-locked reference sources, and other RF signal chains requiring programmable division and phase correction. Engineers should preserve the exposed-pad grounding and supply-decoupling layout shown in the manufacturer datasheet. The serial interface uses CLK, DATA, and LE signals, and 24-bit words are transferred on rising clock edges when latch enable is asserted.
Because this is an external-VCO PLL rather than a complete integrated RF synthesizer, component selection, loop-filter design, reference stability, and VCO phase-noise performance remain external design tasks. The separate charge-pump supply also requires careful decoupling and isolation from sensitive RF and reference circuitry.
This page combines the verified Analog Devices product information, distributor listings, package details, design considerations, commercial availability, and a documented assessment of drop-in replacement evidence. The verified sources do not identify five pin-to-pin-compatible alternatives, so the alternatives list is intentionally limited rather than padded with unsupported cross-package or packaging-only substitutes.
Alternativas drop-in para ADF4002BCPZ — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com ADF4002BCPZ (mesmo formato e footprint) — diferindo em Device Type, Package, Serial Interface.
Nenhuma alternativa drop-in disponível para este produto.
Solicitar alternativasADF4002BCPZ Especificações
| Device Type | Phase Detector / PLL Frequency Synthesizer |
| Maximum Input Frequency | 400 MHz |
| Power Supply Voltage | 3.3 V |
| Supported System Voltage | 3 V |
| Charge Pump Supply | Separate VP supply |
| Charge Pump Current | Programmable |
| Serial Interface | 3-wire SPI-compatible |
| Serial Word Length | 24 bit |
| Reference Counter | 14 bit |
| Reference Divider | Programmable |
| N Divider | Programmable |
| Phase Frequency Detector | Low-noise digital |
| Charge Pump | Precision |
| Number of Circuits | 1 circuit |
| Encapsulamento | 20-lead WFQFN with exposed pad |
| Tipo de montagem | Surface mount |
Guia de Configuração de Pinos do ADF4002BCPZ 20-lead wfqfn with exposed pad
Configuração de pinos para ADF4002BCPZ (pacote 20-lead wfqfn with exposed pad). A numeração dos pinos, funções e diagramas de conexão estão definidos no datasheet do fabricante. Consulte-o para o footprint exato e diretrizes de soldagem.
Nenhum dado detalhado de pinagem disponível para ADF4002BCPZ.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
ADF4002BCPZ é adequado para 6 aplicaçãos: Wireless Receiver Local Oscillator, Wireless Transmitter Up-Conversion, Receiver Down-Conversion, Frequency-Locked Reference Source, RF Signal-Chain Clocking, Communications Test Equipment.
Wireless Receiver Local Oscillator
ADF4002BCPZ fits a wireless receiver local-oscillator path because it combines a 400 MHz maximum input frequency with programmable reference and N dividers. The phase-frequency detector compares the divided feedback signal with the reference, and the precision charge pump converts the phase error into a tuning voltage for an external VCO. Its 3.3 V supply and separate charge-pump rail support compact RF designs. The principal trade-off is that loop-filter, VCO, and reference-noise design remain outside the IC.
Recomendado
Wireless Transmitter Up-Conversion
ADF4002BCPZ can generate the programmable local-oscillator signal used by a wireless transmitter up-conversion stage. Its 400 MHz input bandwidth, programmable dividers, and adjustable charge-pump currents allow the PLL to be adapted to a selected external VCO and reference frequency. The 20-lead exposed-pad package supports compact RF layouts, although exposed-pad grounding and thermal design remain essential. Engineers must verify VCO tuning range, loop stability, reference spurs, and phase noise for the target modulation bandwidth.
Recomendado
Receiver Down-Conversion
ADF4002BCPZ is appropriate for a receiver down-conversion local oscillator when the reference and feedback frequencies fall within its programmable divider capabilities. The low-noise digital phase-frequency detector and precision charge pump support accurate phase-error correction, while the maximum input frequency of 400 MHz addresses higher-rate RF synthesis needs. A separate VP supply can extend the charge-pump tuning range beyond the main 3.3 V supply. Final suitability depends on calculated N-divider values, loop-filter values, reference phase noise, and VCO sensitivity.
Recomendado
Frequency-Locked Reference Source
ADF4002BCPZ can form the locking section of a frequency-locked reference source by dividing a stable reference and correcting an external oscillator through its phase-frequency detector and charge pump. The 14-bit reference counter and programmable reference and N dividers provide the basic integer-N structure needed for such a source. Its separate charge-pump supply permits greater tuning-voltage flexibility than the main 3.3 V rail alone. For laboratory or instrumentation use, reference purity, lock-range margin, acquisition time, and close-in phase noise must be evaluated together.
Recomendado
RF Signal-Chain Clocking
ADF4002BCPZ can support clock generation or coherent frequency translation within an RF signal chain when a stable reference and suitable external VCO are available. Its 400 MHz input bandwidth covers a broad class of RF synthesis tasks, while programmable charge-pump currents provide tuning authority across different VCO sensitivities. The 3.3 V architecture is useful in compact communications equipment. Designers should isolate the charge-pump and reference paths from sensitive RF nodes, maintain short ground returns, and follow the exposed-pad layout guidance in the manufacturer datasheet.
Recomendado
Communications Test Equipment
ADF4002BCPZ can serve as the programmable PLL element in communications test equipment that requires a repeatable, reference-derived local-oscillator signal. Integer-N division, programmable charge-pump current, and a 14-bit reference counter allow the same architecture to cover multiple output arrangements when paired with an appropriate VCO. The exposed-pad package aids compact instrument designs, but thermal and layout implementation must preserve low-noise behavior. Instrument makers should also assess calibration requirements, lock detection, and the tuning range of the selected oscillator.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para ADF4002BCPZ — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto |
|---|---|
| Package | 20-lead WFQFN with exposed pad |
| Brand | Analog Devices |
| Maximum Input Frequency | 400 MHz |
| Power Supply Voltage | 3.3 V |
| Charge Pump Supply | Separate VP supply |
| Charge Pump Current | Programmable |
| Reference Counter | 14 bit |
| Serial Interface | 3-wire SPI-compatible |
| Serial Word Length | 24 bit |
| Architecture | Integer-N PLL frequency synthesizer |
Principais diferenciais
- Supports a 400 MHz maximum input frequency (vs ADF4001BCPZ)
- Separate charge-pump supply supports extended tuning voltage (vs ADF4001BCPZ)
- Configurable integer-N synthesis architecture (vs ADF4001BCPZ)
Notas de projeto
Follow the manufacturer datasheet layout exactly where it specifies input, output, and charge-pump decoupling, particularly around the 3.3 V supply and separate VP rail. Place the shortest, lowest-inductance connection between the exposed pad and the ground plane, and provide uninterrupted ground reference beneath the device. The exposed pad is the primary thermal and electrical return path, so restricting it with fragmented copper can increase junction temperature and degrade RF behavior.
Keep the REF IN, CLK, DATA, LE, phase-detector, and charge-pump paths away from sensitive VCO control and RF nodes. Use a compact ground return for the reference input and preserve the reference-signal amplitude and edge quality required by the device. Since the separate VP supply supports a wider tuning-voltage range, its decoupling capacitor should be placed near the charge-pump supply pins and routed independently from the main supply path where practical.
Do not assume that a related ADF4000-family device is interchangeable merely because it uses the same connector or appears in a parametric search. Verify the exact pinout, PFD frequency, charge-pump current options, divider ranges, power-supply limits, and 24-bit register map against the ADF4002 datasheet. The verified cross-reference results do not establish a drop-in substitute, and packaging-order variants such as reel or tape suffixes do not change the underlying device.
Calculate the charge-pump and VP requirements with the selected external VCO before finalizing the power architecture. The separate VP rail can extend the available tuning voltage, but its absolute operating limit and decoupling requirements must come from the manufacturer specifications. Keep the main 3.3 V supply and VP routing resistant to digital-interface transients. Validate startup, reference-loss behavior, lock acquisition, and charge-pump saturation in the assembled board rather than relying only on simulation.
Informações de conformidade
The supplied verified snippets do not contain authoritative compliance declarations for this exact orderable MPN. Compliance fields remain unknown rather than being inferred from the product family.
