STW81102ATR - 4.65 GHz Multi-Band RF Synthesizer | STMicroelectronics

Multi-Band Wireless Infrastructure RF Synthesis

The STW81102ATR is a candidate for multi-band wireless-infrastructure RF synthesis because it combines an integer-N PLL architecture with two differential integrated VCOs and automatic center-frequency calibration. Its verified catalog maximum is 4.65 GHz, allowing it to address RF generation requirements near that range. The synthesizer can lock its VCOs to a shared reference and produce a stable programmable output. In a base-station or wireless gateway design, this can reduce the number of independent RF oscillator paths and centralize frequency planning. Automatic calibration is particularly useful because it helps the VCO return to its intended center frequency after calibration conditions. The supplied data does not include phase-noise, spur, tuning-range, or lock-time curves, so channel-specific requirements must be checked against the complete manufacturer datasheet before design release.

RF Transceiver Local Oscillator Generation

The STW81102ATR fits local-oscillator generation in an RF transceiver whose operating plan requires a programmable reference-derived RF source. Its two differential integrated VCOs provide direct-output paths, while the documented internal divider provides a divided frequency option within the same multi-band synthesis architecture. With a maximum listed frequency of 4.65 GHz, the device can serve designs near that upper operating region. Differential VCO topology can support balanced integration into RF signal chains, but the actual output drive, return loss, isolation, and harmonic performance are not stated in the supplied excerpts. Those characteristics must be confirmed from the complete datasheet and evaluated on the final PCB, where supply noise and reference coupling can influence phase noise and unwanted spurs.

Programmable RF Test and Measurement Equipment

The STW81102ATR can support programmable RF test and measurement equipment that needs multiple related frequencies derived from one stable reference. The integer-N synthesizer, dual differential VCOs, automatic center-frequency calibration, and listed 4.65 GHz maximum frequency provide a foundation for source selection across several bands. A laboratory instrument can use the direct output for high-frequency stimulus and the internal divider for lower-frequency test tones or clocking-related signals. Because the supplied excerpts do not list phase-noise floors, spur levels, settling time, tuning granularity, or output power, an instrument designer must map these requirements to the full manufacturer data before selecting filter and attenuator components. Board-level reference isolation and supply filtering are especially important when measuring weak or high-dynamic-range signals.

RF Communication Module Frequency Planning

The STW81102ATR is applicable to RF communication modules requiring a compact, programmable frequency-generation function. Its integration of two differential VCOs into a 28-pin VFQFPN package can simplify the physical implementation of multi-frequency RF designs compared with a solution using discrete oscillators and frequency dividers. The device is listed at approximately 12 mA current and supports operation up to 4.65 GHz, making its catalog data relevant to compact wireless hardware. Automatic VCO center-frequency calibration may improve consistency across assembly tolerances and operating conditions. However, the supplied sources do not provide the reference-input range, required loop-filter components, output-power level, or temperature limits, so these values must be obtained from the manufacturer datasheet before schematic capture and PCB commitment.

Industrial RF Monitoring and Control

The STW81102ATR can be evaluated for industrial RF monitoring systems that synthesize carrier or excitation frequencies from a common reference. The multi-band integer-N architecture and dual differential VCOs give an industrial controller a way to cover several operating frequencies without relying on multiple independent RF sources. Automatic center-frequency calibration supports repeatable operation when the equipment experiences supply or environmental variation. The verified 28-pin VFQFPN format is suitable for surface-mount assembly, and the listed 12 mA current provides a preliminary indication of the device class. Final suitability for industrial equipment still depends on the missing operating-temperature range, supply limits, phase-noise performance, aging behavior, and calibration-time requirements, all of which must be taken from the complete STMicroelectronics documentation rather than inferred from the search excerpts.

Frequency-Dependent Sensor Readout

The STW81102ATR may be used in frequency-dependent sensor and industrial readout systems that require an accurate excitation or reference tone. The programmable RF output, available direct and divided paths, and listed 4.65 GHz upper frequency make the synthesizer useful for systems spanning multiple measurement bands. Sharing a stable reference between the synthesizer and measurement electronics can simplify synchronization because generated and measured frequencies remain phase-related. For capacitive, inductive, resonant, or radar-based sensors, the actual sensor bandwidth and required spectral purity govern the choice. The provided data does not identify phase noise, spur suppression, tuning resolution, settling time, or reference jitter limits, so engineers must compare the complete datasheet with the measurement dynamic range. PCB layout should minimize reference coupling and preserve controlled return paths beneath the RF package.