ADF4112BCPZ - 3GHz Integer-N RF PLL | Analog Devices
MPN： ADF4112BCPZ ✓ 啟用中ADF4112BCPZ 概覽
An RF PLL frequency synthesizer is a closed-loop timing-control IC that locks a voltage-controlled oscillator to a stable reference frequency. It belongs to the phase-locked-loop family, which provides frequency synthesis, clock generation, modulation, and frequency translation within wireless transmitters and receivers. The ADF4112 supports CMOS or TTL reference inputs and produces a clock output for use as a local oscillator or system clock source.
Key features include an RF bandwidth of 4 GHz, a programmable 4/5 or 8/9 dual-modulus prescaler, programmable charge-pump current, and a separate VP connection for extended tuning-voltage capability. The product page identifies the A counter as 6 bits and the B counter as 13 bits, allowing programmable division ratios. The 3.3 V supply operation suits compact RF and wireless designs using contemporary low-voltage signal-chain architectures.
Technically, the synthesizer uses an integer-N architecture to generate an output frequency derived from the reference, reference divider, prescaler, and programmable feedback counters. Its phase-frequency detector and charge pump generate an error current that controls the tuning path of an external voltage-controlled oscillator. A properly selected loop filter and external VCO remain central to achieving low phase noise, adequate locking time, and clean spectral performance.
Typical applications include wireless receiver and transmitter local oscillators, up-conversion and down-conversion sections in RF systems, instrumentation and test equipment, and frequency-generation modules for industrial or communication equipment. Its 3 GHz maximum output frequency makes it suitable for systems operating within the RF bandwidth of the device when the prescaler, counters, reference, VCO, and loop filter are configured correctly.
Design around the separate VP pin by reviewing the external VCO tuning range and charge-pump requirements in the manufacturer datasheet. Keep the RF output path short, use a controlled reference signal, and place loop-filter components close to the synthesizer pins. Thermal design should account for the exposed pad and the copper area available on the PCB.
This product page combines the exact ADF4112BCPZ identifiers, verified package information, application guidance, design considerations, and a conservative replacement analysis. It focuses on engineering suitability rather than treating a related PLL as interchangeable without verified pin and parameter equivalence.
直接替換替代品，適用於 ADF4112BCPZ — 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： ADF4112BCPZ （相同外形與佔位） — 差異在於 A Counter, B Counter, Package, Charge Pump, Input Frequency Range.
ADF4112BCPZ-RL7
✅ 直接替換📋 參考替代品（不在目錄中）
ADF4113BCPZ
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →ADF4112BCPZ 規格
| Product Type | Integer-N RF PLL frequency synthesizer |
| Maximum Synthesized Frequency | 3 GHz |
| RF Bandwidth | 4 GHz |
| Input Frequency Range | 5 MHz to 3 GHz |
| 供應電壓 | 3.3 V |
| Input Logic | CMOS or TTL |
| 輸出類型 | Clock |
| Architecture | Single integer-N PLL |
| Prescaler Ratios | 4/5 or 8/9 |
| A Counter | 6 bits |
| B Counter | 13 bits |
| Charge Pump | Programmable current |
| VP Connection | Separate connection for extended tuning voltage |
| 封裝 | 20-lead LFCSP with exposed pad |
| Number of Circuits | 1 |
| 安裝類型 | Surface mount |
ADF4112BCPZ 20-lead lfcsp with exposed pad 腳位配置指南
ADF4112BCPZ（20-lead lfcsp 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： ADF4112BCPZ.
請參閱 資料表 以查看完整腳位配置。
典型應用
ADF4112BCPZ 適用於 6 應用s: Wireless Receiver Local Oscillator, Wireless Transmitter Up-Conversion, RF Down-Conversion, Test and Measurement Instrumentation, Industrial RF Control Systems, Communications Module Clocking.
Wireless Receiver Local Oscillator
The ADF4112BCPZ is appropriate for generating a programmable local-oscillator signal in wireless receiver conversion paths. Its 3 GHz maximum synthesized frequency, 4 GHz RF bandwidth, and programmable 4/5 or 8/9 prescaler support division-ratio planning across common RF operating bands. The reference frequency enters the integer-N loop along with the A and B counters, while the charge pump and external loop filter control the associated voltage-controlled oscillator. The separate VP connection also supports VCO designs needing an extended tuning range, provided its limits are reviewed in the manufacturer datasheet.
推薦
Wireless Transmitter Up-Conversion
In a transmitter up-conversion chain, the ADF4112BCPZ can provide the stable local-oscillator reference needed by an RF mixer or frequency-conversion stage. Its programmable prescaler, 6-bit A counter, and 13-bit B counter enable the desired integer-N frequency ratio to be established from a stable reference. The low-voltage 3.3 V supply suits compact RF assemblies, while the 4 GHz RF bandwidth covers the stated operating class of the synthesizer. The external VCO, loop filter, reference source, and charge-pump settings must be tuned together to achieve the required phase noise and lock behavior.
推薦
RF Down-Conversion
The ADF4112BCPZ can support an RF down-conversion subsystem by supplying a programmable clock for a mixer or demodulator. Its integer-N architecture derives the output from the reference divider, prescaler, A counter, and B counter, enabling deterministic frequency planning without fractional-N digital division. The 3 GHz maximum synthesized frequency is suitable for many microwave receiver stages, while the stated 4 GHz RF bandwidth broadens the usable signal range. Engineering evaluation should include reference phase-noise contribution, VCO tuning sensitivity, loop bandwidth, and the separate VP requirement of the external tuning network.
推薦
Test and Measurement Instrumentation
A programmable PLL can simplify the clock architecture of RF test and measurement equipment requiring selectable frequencies. The ADF4112BCPZ offers integer-N synthesis up to 3 GHz, programmable prescaler choices of 4/5 and 8/9, and programmable charge-pump current for tuning an external voltage-controlled oscillator. These controls allow the loop dynamics to be matched to different reference rates and settling requirements. For instrumentation, phase noise, reference purity, spur performance, and lock-time requirements should be evaluated as a complete chain rather than inferred from the 3 GHz output-frequency limit alone.
推薦
Industrial RF Control Systems
Industrial RF control systems can use the ADF4112BCPZ when a compact, programmable frequency source is needed for sensing, monitoring, or communication hardware. Its single PLL architecture reduces the number of synthesis blocks while retaining programmable divider ratios and charge-pump settings. The 3.3 V supply supports integration into compact mixed-signal assemblies, and the exposed-pad LFCSP package requires deliberate thermal and return-path layout. Designers should establish the required output frequency, reference stability, allowed spurious content, and environmental limits before fixing the loop filter and VCO selection.
推薦
Communications Module Clocking
The ADF4112BCPZ can act as the programmable RF timing source within compact communications modules that require coherent local-oscillator generation. Its maximum synthesized frequency of 3 GHz, 4 GHz RF bandwidth, and selectable dual-modulus prescaler support multiple frequency plans. The 6-bit A counter and 13-bit B counter provide programmable integer-N division, while the separate VP connection accommodates extended VCO tuning voltage. Compact modules benefit from the 20-lead LFCSP footprint, but RF trace control, exposed-pad grounding, reference isolation, and loop-filter placement remain essential for predictable phase-noise and spur performance.
推薦
推薦產品摘要
工程參考資料，適用於 ADF4112BCPZ — 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 | ADF4112BCPZ-RL7 | ADF4113BCPZ |
|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices |
| Package | 20-lead LFCSP exposed pad | 20-lead LFCSP exposed pad - verify ordering drawing | 20-lead LFCSP exposed pad |
| Product Type | Single integer-N RF PLL | Single integer-N RF PLL | Integer-N RF PLL |
| RF Bandwidth | 4 GHz | 4 GHz | 4 GHz |
| Supply Voltage | 3.3 V | 3.3 V | 3.3 V |
| Charge Pump | Programmable current | Programmable current | Programmable current |
| Reference Divider | Programmable | Programmable | Programmable |
主要差異化特點
- Same-family ordering option preserves the ADF4112 RF bandwidth (對比ADF4112BCPZ-RL7)
- Single integer-N RF PLL architecture (對比ADF4113BCPZ)
- Separate VP connection supports extended VCO tuning voltage (對比ADF4113BCPZ)
設計說明
Place the reference input, feedback-divider input, and RF output paths using short, controlled-impedance traces. Keep the loop filter close to the charge-pump and feedback connections, with its ground return connected directly to the exposed-pad ground structure. The separate VP connection and external VCO tuning network should be isolated from sensitive reference and RF paths to reduce modulation coupling and unwanted phase noise.
Follow the manufacturer land pattern for the 20-lead LFCSP exposed-pad package and provide adequate ground-via density beneath and around the exposed pad. Thermal performance depends on both the pad connection and the available copper plane, so do not treat the exposed pad as optional. Verify the pin-one orientation and pin functions against the ADF4112 datasheet before assigning tracks or connecting the separate VP supply.
Select the 4/5 or 8/9 prescaler according to the required VCO output frequency and confirm that the resulting integer-N division ratio is valid for the reference and counter ranges. Programmable charge-pump current must be coordinated with the loop filter and VCO gain; excessive current can increase ringing or instability, while insufficient current can slow acquisition. The VP voltage limit must also be confirmed against the external tuning range.
合規資訊
The ADF4112 family is listed as production by Analog Devices, but no explicit RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status was stated for the exact ADF4112BCPZ ordering code.