ADF4002BCPZ - 400 MHz PLL Frequency Synthesizer | Analog Devices
MPN： ADF4002BCPZ ✓ 啟用中ADF4002BCPZ 概覽
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.
直接替換替代品，適用於 ADF4002BCPZ — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： ADF4002BCPZ （相同外形與佔位） — 差異在於 Device Type, Package, Serial Interface.
此產品無可直接替換的替代品。
申請替代品ADF4002BCPZ 規格
| 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 |
| 封裝 | 20-lead WFQFN with exposed pad |
| 安裝類型 | Surface mount |
ADF4002BCPZ 20-lead wfqfn with exposed pad 腳位配置指南
ADF4002BCPZ（20-lead wfqfn with exposed pad 封裝）的腳位配置。 腳位編號、功能與連接圖定義於製造商資料手冊中。請參閱該手冊以取得確切的封裝尺寸與焊接指引。
無詳細腳位定義資料： ADF4002BCPZ.
請參閱 資料表 以查看完整腳位配置。
典型應用
ADF4002BCPZ 適用於 6 應用s: 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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
推薦產品摘要
工程參考資料，適用於 ADF4002BCPZ — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 |
|---|---|
| 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 |
主要差異化特點
- Supports a 400 MHz maximum input frequency (對比ADF4001BCPZ)
- Separate charge-pump supply supports extended tuning voltage (對比ADF4001BCPZ)
- Configurable integer-N synthesis architecture (對比ADF4001BCPZ)
設計說明
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.
合規資訊
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.
