SI4112-D-GM - 1 GHz RF Frequency Synthesizer | Skyworks
MPN: SI4112-D-GM ✗ Cuối đờiSI4112-D-GM Tóm tắt
An RF frequency synthesizer is a timing and frequency-generation IC that derives a stable output from a reference signal. Within the signal-chain hierarchy, the SI4112-D-GM is an RF synthesizer, a phase-locked-loop device, a clock-generation component, and ultimately an RF and wireless semiconductor. Its role is to establish a programmable frequency reference for RF signal paths rather than regulate a power rail or amplify an analog signal. Integrating the synthesis functions reduces the number of external discrete elements required by a communication subsystem.
The principal verified features are the 1 GHz maximum synthesizer frequency, 1 GHz synthesis capability, single-channel architecture, 28-VFQFN exposed-pad construction, and RF synthesis function. Skyworks describes the device as addressing price-sensitive, low-power, high-performance personal-wireless requirements by substantially reducing external passive-component count. The exposed pad provides a defined thermal and land-pattern feature in the package, while the compact VFQFN format supports high-density RF board layouts.
The device family is associated with IF and dual-band RF synthesis, making it relevant to wireless personal communications, RF transceivers, frequency-generation modules, and communication test equipment. Because the supplied sources do not provide complete operating-voltage, reference-input, output-power, phase-noise, temperature, or control-interface values, those specifications are intentionally not inferred. Engineers should consult the manufacturer datasheet and evaluate the complete electrical and pin-level requirements before releasing a production design.
Typical design use places the SI4112-D-GM in the frequency-generation section of an RF communication system. Its integrated synthesizer reduces external VCO and varactor requirements, which can shorten RF layout effort and lower component count compared with a discrete implementation. The 28-VFQFN exposed-pad package still requires careful thermal-via layout and short, controlled RF interconnects to preserve intended performance.
The key implementation consideration is package and RF layout validation. Place the device according to the manufacturer land pattern, provide the specified reference and decoupling connections, and verify exposed-pad soldering and thermal-via density. Do not substitute a 24-TSSOP part such as SI4112-D-GT for this VFQFN device without a complete mechanical and pin-level review.
This product page consolidates the verified Skyworks and distributor information, distinguishes the VFQGN device from differently packaged family members, and highlights practical RF layout considerations that are not apparent from a basic distributor listing.
Bộ thay thế dễ dàng lắp đặt cho SI4112-D-GM — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với SI4112-D-GM (cùng hình factor và footprint) — khác nhau ở Package, External VCO Requirement, Device Type.
SI4112-D-GMR
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Xem tài liệu →SI4112-D-GM Thông số kỹ thuật
| Product Type | RF frequency synthesizer IC |
| Maximum Synthesis Frequency | 1 GHz |
| Synthesis Capability | 1 GHz |
| Channel Count | 1 |
| Synthesis Functions | IF and dual-band RF frequency synthesis |
| Hộp | 28-VFQFN exposed pad |
| Package Pin Count | 28 pins |
| External VCO Requirement | Eliminated according to manufacturer product-page description |
| External Varactor Diode Requirement | Eliminated according to manufacturer product-page description |
Hướng dẫn cấu hình chân SI4112-D-GM 28 pins
Cấu hình chân cho SI4112-D-GM (28 pins gói). Số thứ tự chân, chức năng và sơ đồ kết nối được xác định trong tài liệu thông số kỹ thuật của nhà sản xuất. Tham khảo nó để biết footprint và hướng dẫn hàn chính xác.
Không có dữ liệu chân cụ thể sẵn có cho SI4112-D-GM.
Tham khảo: tài liệu kỹ thuật cho cấu hình chân đầy đủ.
Ứng dụng tiêu biểu
SI4112-D-GM phù hợp cho 6 Áp dụngs: Wireless Personal Communications, RF Transceiver Frequency Generation, Precision Timing and Communication Systems, Dual-Band RF Signal Sources, Compact RF Communication Modules, RF Communication Test Equipment.
Wireless Personal Communications
The SI4112-D-GM is designed for wireless personal communications, where a programmable RF frequency reference is needed for transmit and receive signal paths. Skyworks identifies IF and dual-band RF synthesis capabilities, while the verified distributor listing specifies a maximum 1 GHz synthesis frequency and one channel. Integrating the synthesizer functions can reduce external passive-component count and remove the need for external VCOs and varactor diodes according to the manufacturer description. Designers should verify reference frequency, output level, phase noise, and tuning limits against the radio specification before layout release.
Được đề xuất
RF Transceiver Frequency Generation
The SI4112-D-GM can serve as the frequency-generation element beside RF transceiver circuitry when the system requires a compact, low-noise synthesis source. Its reported 1 GHz maximum synthesis frequency makes it relevant to RF signal chains operating below that ceiling, while the integrated synthesizer approach can simplify board partitioning. The device does not replace transceiver gain, mixing, or filtering functions; it supplies the local frequency reference. Exact IF frequencies, output impedance, phase-noise targets, and supply conditions must be confirmed from the manufacturer datasheet.
Được đề xuất
Precision Timing and Communication Systems
Skyworks describes the SI4112-D-GM as suitable for precision timing applications in communication systems. Its synthesizer function provides a controlled RF frequency reference where stable timing relationships are required between local oscillator, modulation, and demodulation blocks. The verified data does not provide phase-noise values, reference-input limits, or temperature coefficients, so timing-margin calculations require the complete manufacturer specification. The 28-VFQFN exposed-pad package helps support compact implementations, provided thermal-via and land-pattern guidance is followed exactly.
Được đề xuất
Dual-Band RF Signal Sources
The SI4112-D-GM is described by Skyworks as supporting IF and dual-band RF frequency synthesis. This makes it relevant to radio architectures that require related local frequencies within one synthesizer package, potentially simplifying RF interconnects and reducing discrete oscillator components. The verified distributor result identifies one channel, so the design should not assume multiple independent outputs without checking the datasheet. Band-specific tuning, output isolation, reference leakage, and spur performance are not provided and must be measured or read from the authoritative specification.
Được đề xuất
Compact RF Communication Modules
The integrated RF synthesizer architecture can be useful in compact wireless modules where component count and board area matter. Skyworks states that the SI4112-D-GM reduces external passive-component count and eliminates external VCOs and varactor diodes, which may lower assembly complexity compared with a discrete implementation. The 28-VFQFN exposed-pad package still requires a controlled thermal path, short RF traces, and validated impedance construction. Because no package dimensions or land pattern were included in the supplied data, the manufacturer drawing is mandatory for mechanical implementation.
Được đề xuất
RF Communication Test Equipment
The SI4112-D-GM may be evaluated for RF communication test equipment that requires a programmable local frequency source. The verified 1 GHz synthesis ceiling and IF/dual-band capability provide a basis for screening the part against low-level RF test architectures, while the integrated approach can reduce the number of external frequency-generation components. Instrument designers must account for phase noise, tuning accuracy, reference purity, output level, and settling time, none of which are quantified in the supplied sources. Bench validation should precede adoption in precision measurement paths.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho SI4112-D-GM — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | SI4112-D-GMR |
|---|---|---|
| Brand | Skyworks Solutions Inc. | Silicon Labs |
| Package | 28-VFQFN exposed pad | 28-VFQFN |
Bảo phân biệt quan trọng
- Integrated RF synthesis approach (vsDiscrete VCO and varactor implementation)
- Single-channel 1 GHz synthesizer (vsMulti-channel RF synthesizer families)
- 28-VFQFN exposed-pad package (vsSI4112-D-GT)
Ghi chú thiết kế
Use the manufacturer's exact 28-VFQFN land pattern and do not infer dimensions from the generic VFQFN name. The exposed pad should be connected according to the official package drawing and thermal guidance. Confirm pin numbering, exposed-pad connectivity, solder-mask clearance, and paste design before fabrication because the supplied sources do not provide a complete mechanical drawing.
Keep RF interconnects short and use a controlled impedance structure where the device drives RF-sensitive circuitry. Isolate synthesizer and reference lines from switching nodes and high-current return paths. The verified data does not specify trace geometry or reference routing, so board-level isolation and impedance decisions must be validated against the manufacturer reference design and RF simulation.
The 28-VFQFN exposed pad provides the package thermal path, but the supplied data does not state thermal resistance or maximum power dissipation. Estimate junction temperature using the actual dissipation, board copper, via arrangement, and ambient conditions; do not treat the package name as a thermal rating. Confirm the manufacturer’s maximum operating conditions and thermal-via recommendation before production release.
Do not substitute SI4112-D-GT based on function alone: the verified listing identifies SI4112-D-GT as a 24-TSSOP device, whereas SI4112-D-GM is a 28-VFQFN exposed-pad device. Also do not assume that the manufacturer’s elimination of external VCOs and varactor diodes removes all external reference, filtering, decoupling, or RF matching requirements. Confirm the complete application circuit.
Thông tin tuân thủ
The supplied verified data does not state RoHS, REACH, lead-free, halogen-free, conflict-minerals, or automotive qualification information for the SI4112-D-GM. Compliance fields are therefore unknown or not applicable as shown.
