ADF4111BCP - 1.2 GHz Integer-N PLL | Analog Devices
料号： ADF4111BCP ✓ 量产中ADF4111BCP 概述
A PLL frequency synthesizer is a feedback-controlled timing IC that locks a programmable output oscillator to a stable reference frequency. Its hierarchy is PLL frequency synthesizer > frequency synthesizer > clock and timing IC > integrated circuit. Within that hierarchy, the ADF4111 is an integer-N architecture, meaning the prescaler, A counter, and B counter divide the reference and feedback signals through an integer relationship to establish the output frequency.
Key features include a programmable dual-modulus prescaler, programmable charge-pump currents, a programmable reference divider, a 6-bit A counter, and a 13-bit B counter. The separate charge-pump supply permits an extended tuning-voltage range, while the 5.5 V supply arrangement supports low-voltage RF system integration. Its integer-N architecture is useful when fractional-N frequency synthesis is unnecessary and a straightforward integer division ratio is preferred.
Technically, the ADF4111 combines a low-noise digital phase-frequency detector, a precision charge pump, a reference divider, and the dual-modulus prescaler into a single frequency-synthesizer IC. The phase-frequency detector compares the divided reference and feedback signals; the charge pump converts phase and frequency errors into a tuning voltage that controls the external voltage-controlled oscillator. This architecture supports local-oscillator generation in RF upconversion and downconversion paths.
Typical applications include wireless receiver and transmitter local oscillators, instrumentation and test equipment, industrial RF control, and frequency-generation modules operating below the device's 1.2 GHz upper synthesis limit. The 20-pin LFCSP surface-mount package supports compact RF boards, but its exposed pad requires careful PCB thermal design and a low-impedance ground connection.
The primary design consideration is the analog loop around the external VCO. Component values for the loop filter and charge-pump current must be selected from the intended reference frequency, phase noise requirement, VCO gain, prescaler, and lock-time target. The exposed pad should be connected to ground through a short thermal-via path, and high-frequency reference and RF routing should remain controlled and short.
This page consolidates the verified Analog Devices product information, package details, lifecycle information, sourcing links, and application guidance into one engineering-focused reference. It also distinguishes true drop-in family alternatives from newer synthesizer architectures that may use the same package family but provide different interfaces or frequency-generation features.
直接替换替代料： ADF4111BCP ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： ADF4111BCP （相同外形与封装尺寸） ——差异在于 Package, A Counter, B Counter, Prescaler, Power Supply.
ADF4110BCP
✅ 直接替换 ⚠️ 规格未核验联系询价
查看数据手册 →ADF4112BCP
✅ 直接替换 ⚠️ 规格未核验联系询价
查看数据手册 →ADF4113BCP
✅ 直接替换 ⚠️ 规格未核验联系询价
查看数据手册 →ADF4111BCP 规格参数
| Product Type | Single integer-N PLL frequency synthesizer |
| Maximum PLL Synthesis Frequency | 1.2 GHz |
| Reference Input Frequency Range | 5 MHz to 1.4 GHz |
| Power Supply | 5.5 V |
| Charge Pump Supply | Separate VP supply |
| Prescaler | Programmable dual-modulus P/P+1 prescaler |
| A Counter | 6-bit programmable |
| B Counter | 13-bit programmable |
| Reference Divider | Programmable |
| Charge Pump Current | Programmable |
| Phase Detector | Low-noise digital phase-frequency detector |
| 封装 | 20-pin LFCSP with exposed pad |
| 安装类型 | Surface mount |
ADF4111BCP 20-pin lfcsp with exposed pad 引脚配置指南
ADF4111BCP（20-pin lfcsp with exposed pad 封装）的引脚配置。 引脚编号、功能和连接图在制造商数据手册中定义。请参阅该手册以了解确切的封装尺寸和焊接指南。
暂无详细引脚数据： ADF4111BCP.
请参阅 数据手册 以查看完整引脚配置。
典型应用
ADF4111BCP 适用于 6 应用s: Wireless Receiver Local Oscillator, Wireless Transmitter Upconversion, RF Downconversion Mixer, Industrial RF Signal Generator, Instrumentation and Test Equipment, Frequency Reference Distribution.
Wireless Receiver Local Oscillator
The ADF4111BCP fits a wireless receiver local oscillator because it provides a programmable integer-N PLL architecture with a maximum synthesis frequency of 1.2 GHz. It can divide a stable reference through the programmable reference divider, A counter, B counter, and dual-modulus prescaler to establish the required oscillator condition. When used with an external VCO, the low-noise digital phase-frequency detector and precision charge pump help control frequency error, while the separate VP supply supports an extended tuning-voltage range. Designers should derive the loop filter from the reference rate, prescaler, VCO gain, and required lock time rather than treating the 1.2 GHz limit as sufficient performance proof.
推荐
Wireless Transmitter Upconversion
The ADF4111BCP can support wireless transmitter upconversion by generating a stable local-oscillator reference for mixers and RF signal chains. Its 1.2 GHz maximum synthesis frequency covers the stated device class, while the programmable prescaler and counters permit selectable frequency ratios. The separate charge-pump supply allows the tuning range of the external VCO to extend beyond the nominal 5.5 V main supply when the system design requires it. Engineers should evaluate reference phase noise, prescaler selection, charge-pump current, and loop damping together because the highest available output frequency does not by itself guarantee acceptable adjacent-channel or carrier performance.
推荐
RF Downconversion Mixer
The ADF4111BCP is applicable to RF downconversion where a synthesized local oscillator drives a mixer in a receiver or instrumentation block. The 1.2 GHz upper synthesis frequency and programmable integer-N division architecture provide a compact way to derive multiple oscillator settings from one reference source. Its low-noise phase-frequency detector and precision charge pump work with an external VCO, making phase-noise performance strongly dependent on reference quality and loop design. For production designs, engineers should characterize lock behavior across temperature and supply variation and verify that the selected prescaler does not introduce unacceptable phase-noise multiplication.
推荐
Industrial RF Signal Generator
The ADF4111BCP can form the synthesis core of an industrial RF signal generator or test module because it combines programmable division with a maximum 1.2 GHz synthesis frequency. The 6-bit A counter, 13-bit B counter, programmable prescaler, and programmable reference divider support multiple frequency plans derived from a stable source. An external VCO and carefully calculated loop filter remain necessary to define phase noise and settling performance. For automated test equipment, the design should include a deterministic enable or power-up sequence and validate lock across supply, temperature, and RF-load changes rather than relying only on nominal counter ratios.
推荐
Instrumentation and Test Equipment
The ADF4111BCP is well suited to instrumentation requiring an adjustable RF source below 1.2 GHz. A common implementation places the synthesizer beside an external VCO, filter, and output amplifier, with the ADF4111 controlling the VCO through its charge-pump output. Programmable prescaler, counter, and charge-pump settings allow the loop to be adapted to different output-frequency plans and settling requirements. Because the verified information does not provide specific phase-noise, lock-time, or temperature figures, equipment developers should obtain those values from the official Data Sheet Rev. F and validate them against the selected reference and loop-filter components.
推荐
Frequency Reference Distribution
The ADF4111BCP can be used in a compact frequency-generation module that derives an RF output from a common reference distributed across an instrument. Its programmable reference divider and integer-N counters allow multiple synthesis ratios to be configured around one reference source, while the 1.2 GHz maximum supports RF outputs within that range. The LFCSP exposed pad reduces board area but demands solid thermal vias and a short ground connection. In multi-channel systems, designers should isolate reference routing, keep the phase detector and charge-pump loop compact, and account for reference-divider settings and prescaler ratios when coordinating channel-to-channel phase behavior.
推荐
推荐产品汇总
工程参考数据： ADF4111BCP ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | ADF4110BCP | ADF4112BCP | ADF4113BCP |
|---|---|---|---|---|
| Package | 20-pin LFCSP with exposed pad | 20-pin LFCSP with exposed pad | 20-pin LFCSP with exposed pad | 20-pin LFCSP with exposed pad |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Maximum Synthesis Frequency | 1.2 GHz | 550 MHz | 3.0 GHz | 4.0 GHz |
| Frequency Synthesis Architecture | Integer-N | Integer-N | Integer-N | Integer-N |
| Prescaler | Programmable dual-modulus P/P+1 | Programmable dual-modulus P/P+1 | Programmable dual-modulus P/P+1 | Programmable dual-modulus P/P+1 |
| A Counter | 6-bit programmable | 6-bit programmable | 6-bit programmable | 6-bit programmable |
| B Counter | 13-bit programmable | 13-bit programmable | 13-bit programmable | 13-bit programmable |
| Charge Pump | Programmable current with separate VP supply | Programmable current with separate VP supply | Programmable current with separate VP supply | Programmable current with separate VP supply |
| Reference Divider | Programmable | Programmable | Programmable | Programmable |
| Power Supply | 5.5 V | 5.5 V | 5.5 V | 5.5 V |
关键差异点
- Exact 1.2 GHz family-class upper synthesis frequency （对比 ADF4110BCP)
- Lower maximum frequency than the higher-range family members （对比 ADF4112BCP)
- Integer-N architecture with programmable dual-modulus prescaler （对比 ADF4153BCPZ)
设计说明
Treat the LFCSP exposed pad as both a thermal path and a low-impedance ground connection. Place multiple PCB vias within or immediately beneath the exposed-pad area, verify the manufacturer's land pattern, and maintain a continuous ground reference on adjacent layers. Avoid placing a thermal-via field under a high-impedance RF node. Exact junction-temperature and thermal-resistance limits were not present in the supplied verified data and must be taken from the official datasheet before a production thermal budget is approved.
Keep the reference input, phase-frequency detector, charge-pump output, and loop-filter components close to the ADF4111BCP and away from switching-node and high-current return paths. Preserve a continuous ground plane under the RF and loop-filter section. The external VCO control line should be short and shielded from noisy clocks or magnetics. Because the verified data does not provide recommended PCB artwork, follow the Analog Devices datasheet land pattern and evaluation-board layout rather than relying on a generic LFCSP footprint.
Do not select the ADF4110, ADF4112, or ADF4113 solely because the package appears similar. Confirm exact pin compatibility, counter limits, prescaler range, reference-input requirements, charge-pump settings, and operating-frequency limits. An integer-N PLL also requires an integer-compatible division plan; fractional-N alternatives may use a different programming interface even if they have a related package. Schematic and PCB changes should be reviewed against the official family documentation.
合规信息
The supplied verified product information does not explicitly state the requested compliance statuses. The Analog Devices product page lists the ADF4111 as production status, but compliance must be confirmed from the manufacturer's current product documentation or declaration for the exact ordering code.
