ADF4111BRUZ - 1.4 GHz PLL Synthesizer | Analog Devices
MPN： ADF4111BRUZ ✓ 啟用中ADF4111BRUZ 概覽
A phase-locked loop, or PLL, is a feedback-controlled oscillator system that locks a programmable output frequency to a stable reference. Within the frequency-synthesizer hierarchy, the ADF4111 integrates a low-noise digital phase-frequency detector, precision charge pump, programmable reference divider, programmable A and B counters, and a dual-modulus prescaler. It is intended for generating local-oscillator signals used in RF up-conversion and down-conversion paths.
The principal features of the ADF4111BRUZ are its 1.4 GHz RF input capability, integer-N frequency synthesis, programmable reference and feedback paths, and integrated charge-pump and digital phase-detection functions. These characteristics make the device useful where a radio transceiver requires an RF local oscillator derived from a lower-frequency reference. The BRUZ package designation identifies the leaded 16-TSSOP form used for board-level RF and communications equipment.
In operation, the reference signal passes through the programmable reference divider, while the RF feedback signal passes through the prescaler and feedback counters. The phase-frequency detector compares the divided signals, and the charge pump drives the loop-filter output. That control voltage adjusts the external voltage-controlled oscillator, which is then divided back through the feedback path. The external VCO and passive loop-filter component values remain central to phase-noise, reference-spur, lock-time, and channel-spacing performance.
The ADF4111BRUZ is appropriate for wireless receiver and transmitter local oscillators, including systems operating around cellular, radio, microwave, and related RF bands. It can also support test-and-measurement RF sources, instrumentation, and frequency-conversion subsystems where a programmable PLL is preferable to a fixed oscillator. The integrated digital divider and synthesizer functions reduce the number of separate frequency-control blocks required around an external VCO.
A primary design consideration is that the ADF4111BRUZ does not generate a microwave output directly; it controls an external VCO. Component selection for the VCO, loop filter, reference source, crystal, and decoupling network therefore remains critical. The RF input, reference input, charge-pump output, and digital programming interface should follow the manufacturer’s recommended application circuit and pin-description table to achieve predictable phase noise and lock behavior.
This page combines the manufacturer product information, distributor identification, package details, and application guidance with a parameter-by-parameter family comparison. It also identifies which ADF411x-family devices use the same 16-lead TSSOP format and highlights where functional differences require simulation or laboratory verification before substitution.
直接替換替代品，適用於 ADF4111BRUZ — 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： ADF4111BRUZ （相同外形與佔位） — 差異在於 Prescaler, Mounting Type, A Counter, B Counter, Channel Count.
ADF4110BRUZ
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →ADF4112BRUZ
✅ 直接替換聯絡詢價
查看資料表 →ADF4113BRUZ
✅ 直接替換聯絡詢價
查看資料表 →ADF4114BRUZ
✅ 直接替換📋 參考替代品（不在目錄中）
ADF4111BRUZ 規格
| Device Type | Single integer-N PLL frequency synthesizer |
| Maximum RF Input Frequency | 1.4 GHz |
| Manufacturer Maximum Frequency | 1.2 GHz |
| Reference Input | External |
| Prescaler | Programmable dual-modulus P/P+1 |
| Phase Detector | Low-noise digital phase-frequency detector |
| Charge Pump | Precision charge pump |
| Reference Divider | Programmable |
| A Counter | 6-bit programmable |
| B Counter | 13-bit programmable |
| 工作溫度範圍 | -40°C to +85°C |
| 封裝 | 16-TSSOP, 0.173 inch (4.40 mm) width |
| 安裝類型 | Surface-mount |
| 生命週期狀態 | Production |
ADF4111BRUZ 16-tssop, 0.173 inch (4.40 mm) width 腳位配置指南
ADF4111BRUZ（16-tssop, 0.173 inch (4.40 mm) width 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： ADF4111BRUZ.
請參閱 資料表 以查看完整腳位配置。
典型應用
ADF4111BRUZ 適用於 6 應用s: Wireless Receiver Local Oscillator, Wireless Transmitter Up-Conversion, RF Down-Conversion Front End, Programmable RF Signal Source, RF Instrumentation and Test Equipment, Microwave Communication Subsystems.
Wireless Receiver Local Oscillator
The ADF4111BRUZ fits a wireless receiver local oscillator because it combines an external reference input, programmable reference divider, 6-bit A counter, 13-bit B counter, and dual-modulus prescaler in one 16-lead TSSOP device. A designer can use the phase-frequency detector and precision charge pump to control an external VCO, then divide the resulting RF signal back through the feedback path. Its 1.4 GHz maximum RF input provides the timing needed for many receiver conversion architectures. Final suitability depends on the operating band, reference frequency, channel spacing, lock-time requirement, and phase-noise target; those parameters determine the VCO and passive loop-filter design.
推薦
Wireless Transmitter Up-Conversion
ADF4111BRUZ can generate the programmable local-oscillator reference used by a transmitter up-conversion chain. Its integer-N architecture, programmable reference divider, and dual-modulus feedback prescaler allow an external VCO frequency to be divided and compared against a stable reference. The integrated digital phase-frequency detector and charge pump then close the control loop. This arrangement is useful when multiple channels or test vectors require digitally controlled frequency changes. The engineer must select loop-filter components using the actual reference, channel spacing, VCO gain, and target lock time, and must account for the device’s -40°C to +85°C operating range.
推薦
RF Down-Conversion Front End
The ADF4111BRUZ is appropriate for an RF down-conversion front end that requires a synthesized local oscillator for mixing a received signal to a lower intermediate frequency. By controlling an external VCO, the PLL can place a programmable oscillator signal at the frequency required by a receiver channel. The 1.4 GHz maximum RF input and integer-N divider architecture support frequency planning around suitable radio bands, while the 16-lead TSSOP package keeps the synthesizer compact. Exact channel spacing, spur performance, and phase noise depend on the reference source, VCO, loop filter, PCB grounding, and shielding, so bench validation remains essential.
推薦
Programmable RF Signal Source
ADF4111BRUZ can serve as the synthesizer in a programmable RF signal source where an external VCO provides the output frequency and the PLL provides closed-loop regulation. Its programmable reference divider, A and B counters, and dual-modulus prescaler allow the output frequency to be derived mathematically from a reference clock. This arrangement is valuable for laboratory and production-test systems requiring repeatable frequency changes. Performance depends on selecting divider ratios that remain within the counters’ valid ranges and using the manufacturer’s loop-filter procedure. The external VCO must also cover the required tuning range with adequate phase noise and tuning gain.
推薦
RF Instrumentation and Test Equipment
ADF4111BRUZ is well suited to RF instrumentation requiring a stable, digitally programmed local oscillator. The phase-frequency detector compares the divided reference and feedback signals, while the charge pump drives an external loop filter and VCO. A designer can reuse this arrangement across multiple instrument channels or change frequency through the serial programming interface. The 16-lead TSSOP package supports compact board layouts, although careful grounding and short RF feedback paths are necessary. Before implementation, verify maximum RF frequency, minimum channel spacing, reference-divider limits, register timing, and lock behavior against the complete manufacturer family datasheet.
推薦
Microwave Communication Subsystems
ADF4111BRUZ can support frequency-generation blocks in microwave communication subsystems where an external VCO operates within the synthesizer’s RF feedback capability. Its 1.4 GHz maximum RF input, programmable reference path, and integer-N feedback architecture allow channel frequencies to be derived from a stable source. In a multi-channel transmitter or receiver, the same approach can support digitally selected frequencies while retaining a common reference. The primary engineering trade-off is that integer-N division can create a trade-off between channel spacing and reference-divider choice. Phase-noise and spur performance also depend strongly on the loop bandwidth, VCO characteristics, reference quality, and physical implementation.
推薦
推薦產品摘要
工程參考資料，適用於 ADF4111BRUZ — 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 | ADF4110BRUZ | ADF4112BRUZ | ADF4113BRUZ | ADF4114BRUZ |
|---|---|---|---|---|---|
| Package | 16-TSSOP | 16-TSSOP | 16-TSSOP | 16-TSSOP | 16-TSSOP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Device Type | Single integer-N PLL frequency synthesizer | Integer-N PLL frequency synthesizer | Integer-N PLL frequency synthesizer | Integer-N PLL frequency synthesizer | Integer-N PLL frequency synthesizer |
主要差異化特點
- Exact 16-lead TSSOP family format supports board-level PLL integration (對比ADF4112BRUZ)
- Integer-N architecture provides direct integer frequency synthesis (對比ADF4153BRUZ)
- Integrated reference division and dual-modulus feedback support flexible integer-N planning (對比ADF4110BRUZ)
- Production family status supports planned RF product development (對比ADF4114BRUZ)
設計說明
Route the reference input, RF feedback input, and charge-pump output as short, controlled-impedance traces, with the external loop filter placed close to the charge-pump and VCO connection points. Keep the RF feedback path away from high-energy clock and switching nodes. A solid ground plane and short ground returns are essential because parasitic inductance in the feedback and filter paths can degrade phase margin, increase spurs, or cause unreliable locking.
Do not select the prescaler, reference divider, A counter, or B counter independently of the resulting N value. First confirm that the intended output frequency and reference frequency produce legal divider values within the device limits. Then calculate the loop filter from the actual VCO gain, reference frequency, channel spacing, and target lock time. Copying filter values between family members without checking their counter ranges can produce an incorrect divide ratio or unstable loop.
Follow the manufacturer’s supply and decoupling arrangement exactly, including the recommended capacitor types and placement. The charge-pump output and loop-filter node require careful isolation from digital programming signals, while the reference and RF inputs require return paths that minimize pickup. Verify that the external VCO and its supply arrangement do not inject excessive phase noise into the PLL reference path. Bench measurement of reference spurs and phase noise is recommended after layout changes.
Treat the 16-lead TSSOP as a high-frequency mixed-signal component even when the carrier is below 1 GHz. Keep programming traces away from the RF feedback and charge-pump loop, use adequate ground vias around the device, and avoid placing sensitive RF nodes beneath long digital routes. If the VCO is physically close to the synthesizer, orient the package and grounding strategy to prevent VCO output feedback into the reference or RF input.
合規資訊
The manufacturer identifies the ADF4111 family as production, but no explicit RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status was established from the available product information.
