STW81102AT - Multi-Band RF Synthesizer | STMicroelectronics
MPN: STW81102AT ✓ AktifSTW81102AT Ringkasan
A frequency synthesizer belongs to the clock and timing IC hierarchy, where it combines a phase-locked loop, voltage-controlled oscillator, frequency divider, and output driver. In the STW81102AT, dual differential integrated VCOs and automatic center-frequency calibration provide the tuning resources needed for multi-band synthesis. The integer-N architecture means the synthesizer establishes its output relationship to a reference frequency through integer feedback division rather than fractional-N interpolation.
The principal verified features are the two integrated differential VCOs, automatic center-frequency calibration, direct and divided outputs, and coverage extending to 1162.5 MHz. The 5 mm by 5 mm VFQFPN package supports compact RF designs, while its exposed pad provides a thermal and electrical connection to the PCB. The listed supply range is 3 V to 3.6 V, which makes external supply regulation and careful high-frequency layout essential.
STW81102AT is categorized for industrial use and operates from -40 °C to 85 °C. Its BICMOS implementation combines bipolar and CMOS circuit techniques, which is significant in an RF synthesizer because the device must generate controllable high-frequency signals while operating from a low-voltage digital-oriented supply. The maximum reflow temperature stated in the verified product data is 260 °C.
Typical uses include multi-band RF front ends, wireless communication equipment, instrumentation, and frequency-generation subsystems. In these systems, the synthesizer can provide a phase-related output to mixer, modulator, or measurement circuits. The design must account for VCO routing, controlled reference distribution, impedance-matched interconnects, and adequate exposed-pad thermal dissipation.
The most important layout consideration is to preserve a short, symmetric RF path between the device, matching network, and antenna-side circuitry. Reference and control signals should be kept away from sensitive RF nodes, and the exposed pad should be connected to the ground plane using multiple low-inductance vias. Exact pin names, PLL settings, output-drive details, and recommended external components require confirmation in the manufacturer datasheet.
This page consolidates the verified STW81102AT specifications, sourcing links, application guidance, and replacement research into an engineering-oriented overview. It also distinguishes verified drop-in replacements from merely similar frequency synthesizers, helping designers avoid assuming that a different PLL with similar frequency capability is PCB-compatible.
Pilihan pengganti yang segera untuk STW81102AT — sama paket, pin-pin kompatibel. Bahagian paket yang berbeza memerlukan kerja ulang PCB diasingkan.
Tiada pilihan pengganti yang segera untuk produk ini.
Minta AlternatifSTW81102AT Spesifikasi
| Product Type | Multi-band RF frequency synthesizer |
| Architecture | Integer-N frequency synthesizer |
| Input Frequency Range | 10 MHz to 200 MHz |
| Maximum Direct Output Frequency | 1162.5 MHz |
| Oscillator Architecture | Dual differential integrated VCOs |
| VCO Calibration | Automatic center frequency calibration |
| Supply Voltage Range | 3 V to 3.6 V |
| Gambaran Suhu Operasi | -40 °C to 85 °C |
| Kemasan | 28-pin VFQFPN with exposed pad |
| Package Dimensions | 5 mm x 5 mm |
| Jenis Pemasangan | Surface mount |
| Technology | BICMOS |
| Maximum Reflow Temperature | 260 °C |
| Application Classification | Industrial |
| Output Function | Direct output and internal-divider output |
Panduan Konfigurasi Pin STW81102AT 5 mm x 5 mm
Konfigurasi pin untuk STW81102AT (5 mm x 5 mm pakai). Penomeran pin, fungsi, dan garis bentuk koneksi ditakrifkan dalam dokumen pengeluar. Rujuk dokumen untuk kebentuk dan pedoman pengasman.
Tiada data garisan pin yang diperoleh untuk STW81102AT.
Rujuk kepada lembaran data untuk konfigurasi pin penuh.
Aplikasi Biasa
STW81102AT patut untuk 6 aplikasis: Multi-Band RF Front Ends, Wireless Communication Equipment, RF Test and Measurement Instruments, Industrial RF Control Systems, RF Signal Generators, Communications Test Heads.
Multi-Band RF Front Ends
The STW81102AT fits a multi-band RF front end because it combines dual differential integrated VCOs with automatic center-frequency calibration and a direct output capability of up to 1162.5 MHz. The synthesizer can generate a phase-related RF signal for a mixer, modulator, or antenna-chain component without requiring a separate discrete VCO. The designer must confirm the VCO band boundaries and supported divider ratios in the manufacturer datasheet. Its 5 mm by 5 mm VFQFPN-28 package helps preserve RF-board area, while the exposed pad requires a low-inductance ground connection. Care is needed to keep the reference and digital programming paths away from sensitive RF nodes.
Disebarkan
Wireless Communication Equipment
STW81102AT is applicable to wireless communication equipment requiring a compact multi-band frequency source. Its verified 10 MHz to 200 MHz input range and 1162.5 MHz maximum direct output can support RF signal chains operating within those documented limits, while automatic center-frequency calibration helps manage VCO tuning across bands. The integer-N architecture allows the output to be derived coherently from the reference and feedback divider. Board implementation should provide a clean reference connection, short RF output routing, suitable matching, and multiple thermal vias beneath the exposed pad. Final frequency-plan compliance depends on channel spacing, reference accuracy, phase-noise requirements, and regulatory constraints.
Disebarkan
RF Test and Measurement Instruments
The STW81102AT can serve as the programmable RF source in instrumentation that generates coherent test tones or excites receiver and filter paths. Its dual differential integrated VCOs offer multiple tuning resources, and the documented output capability to 1162.5 MHz covers applications within the supported bands. Automatic center-frequency calibration is valuable in instrument architectures where startup tuning must be repeatable. The synthesizer still needs a low-phase-noise reference, an output-power calibration path, and careful isolation from analog measurement circuitry. Because the verified data does not state phase noise or output power, these characteristics must be checked in the manufacturer datasheet before establishing an instrument-grade performance budget.
Disebarkan
Industrial RF Control Systems
STW81102AT is suitable for industrial RF systems requiring a compact frequency generator with calibrated internal VCOs. Its verified -40 °C to 85 °C operating range and industrial application classification support use in temperature-controlled factory equipment, industrial sensors, and RF process-control subsystems. The 3 V to 3.6 V supply requirement calls for a stable regulated rail and effective local decoupling. Designers should treat the exposed pad as both a thermal path and a low-impedance RF ground, using several short ground vias and an uninterrupted reference plane. System-level suitability still depends on the industrial enclosure temperature, vibration environment, required output power, calibration method, and long-term reference stability.
Disebarkan
RF Signal Generators
The STW81102AT can contribute to a compact RF signal-generator architecture by providing an integrated, phase-locked RF source. Its maximum direct output of 1162.5 MHz and dual differential VCO arrangement make it relevant to low- and mid-band generator designs, while automatic center-frequency calibration simplifies initial tuning. A practical implementation requires an external reference oscillator, programmable divider settings, output matching or attenuation, and firmware that translates user commands into synthesizer registers. The device is not automatically a laboratory-grade source because the verified data does not provide phase-noise, tuning-speed, spur, or output-power limits. Those parameters determine whether the architecture meets calibration and measurement-accuracy targets.
Disebarkan
Communications Test Heads
STW81102AT is a candidate for communications test heads that need a compact RF excitation source close to the device under test. Locating the synthesizer beside the RF measurement path can reduce distribution loss and simplify the control architecture. Its integrated VCOs eliminate several discrete high-frequency components, and the documented 1162.5 MHz direct-output ceiling supports excitation within the applicable band. The layout must separate sensitive receiver nodes from the synthesizer's reference and digital buses, while preserving controlled impedance on every RF output route. Before implementation, engineers should verify output-drive capability, isolation between outputs, reference-divider ratios, and whether the intended modulation and burst functions are supported by the complete manufacturer specification.
Disebarkan
Ringkasan Produk Disebarkan
Data referensi kejuruteraan untuk STW81102AT — perbandingan, panduan rancangan, dan maklumat kesediaan
Panduan Pilihan
Perbandingan dengan Gantian
| Parametr | Produk Ini | STW81200TR | ADF4360-0 | LMK03808 |
|---|---|---|---|---|
| Product Type | Multi-band RF frequency synthesizer | Related multi-band RF frequency synthesizer | RF frequency synthesizer | Clock and timing synthesizer |
| Brand | STMicroelectronics | STMicroelectronics | Analog Devices | Texas Instruments |
| Drop-In Compatibility | Original device | Not established | Not a confirmed drop-in | Not a confirmed drop-in |
Penyeberangsung Jelas
- Integrated multi-band VCO architecture (vsADF4360-0)
- Compact RF-integrated package (vsLMK03808)
- Integer-N multi-band architecture (vsSi5338)
Catatan Desain
Preserve a short and symmetric RF path from the STW81102AT output through the matching network to the destination circuit. Keep the reference input, programming interface, and digital return paths separated from sensitive RF nodes to reduce coupling and phase-noise degradation. Use a continuous ground reference beneath the package and connect the exposed pad through several short, low-inductance vias. Confirm exact signal locations using the manufacturer pin diagram before releasing the PCB layout.
Operate the STW81102AT from its verified 3 V to 3.6 V supply range and place local high-frequency decoupling capacitors directly beside the supply and ground terminals. Keep the supply loop small and provide a quiet reference source with adequate isolation from switching converters. Exact capacitance and loop-area recommendations must be verified in the manufacturer application guidance because the supplied data does not specify recommended component values.
Treat the VFQFPN exposed pad as an essential thermal and ground path rather than an optional copper feature. Use the maximum practical number of short ground vias within the package footprint and provide adequate surrounding copper without compromising RF return paths. Actual dissipation cannot be calculated from the verified snippets because operating current and RF output power are missing; measure worst-case current and consult the manufacturer thermal data before defining the enclosure temperature limit.
Do not assume that a similarly described PLL is a drop-in replacement. STW81200TR, ADF4360-0, LMK03808, and Si5338 require package, pinout, reference-input, register-interface, VCO-band, and output-drive verification before substitution. Also avoid treating the 1162.5 MHz maximum direct output as proof that every frequency from 10 MHz through that range is supported by a single VCO band; consult the VCO selection and divider tables in the manufacturer datasheet.
Maklumat Kesediaan
The verified product snippets describe industrial temperature, package, technology, and reflow information but do not explicitly provide RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations.
