SI4122-BT - 1.5 GHz Dual-Band RF Synthesizer | Silicon Labs
MPN: SI4122-BT ✗ Tapus ng BuhaySI4122-BT Ulas
A frequency synthesizer is a clock-and-timing IC that generates a stable output frequency from a reference signal. This synthesizer supports wireless-communication RF signal chains, where programmable frequency generation is used for local oscillators, transceivers, and related RF functions. Its 1.5 GHz headline specification identifies the supported synthesis range in the distributor data, while the dual-band architecture supports wireless RF signal-generation requirements.
The SI4122-BT is identified as a frequency-synthesizer IC with a 1:2 input-to-output ratio in the available distributor records. The available data also reports 18 mA typical supply current, 1 µA standby current, 3.6 V operation, and integrated VCO, loop-filter, varactor, and resonator functions. These features are useful where designers want to minimize external RF support components and simplify the synthesizer implementation.
The 24-TSSOP package has a 0.173 inch, or 4.40 mm, width according to the DigiKey result. It is a surface-mount package, and the available distributor data identifies a 24-pin TSSOP with SMD/SMT mounting. Exact pin names, operating-temperature limits, phase-noise figures, frequency ranges by band, and full electrical limits were not supplied in the verified data and are therefore not inferred here.
Typical applications include wireless-communication transmitters and receivers, RF transceiver local-oscillator paths, dual-band RF signal generation, and embedded RF systems requiring a programmable synthesizer. Designers should confirm the complete pinout, reference requirements, loop-filter configuration, and band-specific operating limits against the manufacturer datasheet before layout or firmware release.
For implementation, preserve the supplied 24-pin TSSOP footprint and validate the reference and RF routing according to the manufacturer’s layout guidance. The integrated resonator and VCO functions can reduce external component count, but RF layout, grounding, decoupling, and keep-out requirements remain critical.
This page consolidates verified distributor specifications, sourcing links, packaging information, and design considerations while clearly identifying parameters that still require datasheet confirmation.
Mga alternatibo na pwedeng ilagay na SI4122-BT — parehas na package, pin-to-pin na katugmang. Hindi kasama ang mga bahagi ng iba't-ibang package na nangangailangan ng pagpapaayos ng PCB.
Variante sa Seri na ito
Katulad na modelo sa serye na katugma sa pagpasok SI4122-BT (parehas na form factor at footprint) — pagkakaiba sa Package, Mounting Type, Product Type, Standby Current, Typical Supply Current.
SI4122-D-GT
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →SI4112-BT
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →SI4133-BT
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →SI4136-BT
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →SI4122-D-GTR
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →SI4122-BT Mga Spesipikasyon
| Product Type | Frequency synthesizer IC |
| Frequency | 1.5 GHz |
| Supply Voltage Range | 2.7 V to 3.6 V |
| Typical Supply Current | 18 mA |
| Standby Current | 1 µA |
| Architecture | Dual-band RF synthesizer |
| Integrated Blocks | Integrated VCOs, loop filters, varactors, and resonators |
| External Components Required | 2 minimum |
| Input-to-Output Ratio | 1:2 |
| Operating Mode | 3.6 V operation |
| Packhaging | 24-pin TSSOP |
| Package Width | 0.173 in (4.40 mm) |
| Uri ng Pagpapasok | SMD/SMT |
| Kategorya | Clock/Timing - Clock Generators, PLLs, Frequency Synthesizers |
| Manufacturer | Silicon Labs |
| Level ng MSL | Level 3, 168 hours |
| HTSUS Code | 8542.39.0001 |
Gabay sa Pin Configuration ng SI4122-BT 0.173 in (4.40 mm)
Pin configuration para sa SI4122-BT (0.173 in (4.40 mm) package). Ang pagnunumero ng pin, mga function, at connection diagram ay tinukoy sa datasheet ng manufacturer. Sumangguni dito para sa eksaktong footprint at mga alituntunin sa soldering.
Wala ng detalyadong pinout data na magagamit para sa SI4122-BT.
Sumangguni sa datasheet para sa buong pin configuration.
Tipikal na mga Gamit
SI4122-BT ay nararapat para sa 6 aplikasyons: Dual-Band Wireless RF Signal Generation, RF Transceiver Local Oscillator, Wireless Communications Transmitter, RF Receiver Frequency Generation, Programmable RF Test and Measurement Equipment, Embedded Wireless Sensor and IoT Module.
Dual-Band Wireless RF Signal Generation
The SI4122-BT fits dual-band wireless RF signal-generation paths because the verified data identifies a dual-band RF synthesizer with integrated VCOs, loop filters, varactors, and resonators. The 1.5 GHz frequency specification provides a defined RF operating point for wireless designs, while the 2.7 V to 3.6 V supply range suits low-voltage systems. Place the synthesizer according to the manufacturer layout guidance, provide controlled reference routing, and verify the selected RF band, output impedance, and loop-filter configuration before release.
Inirekomenda
RF Transceiver Local Oscillator
The SI4122-BT can support RF transceiver local-oscillator requirements when the selected synthesis band matches the transceiver architecture. Its integrated synthesizer blocks reduce the number of external RF-support components reported by the available listing, while the 18 mA typical supply current provides a concrete power-budget reference for portable equipment. Validate reference phase noise, spur requirements, output power, and isolation because those parameters were not included in the verified data and must come from the manufacturer documentation.
Inirekomenda
Wireless Communications Transmitter
The SI4122-BT is described as a dual-band RF synthesizer for wireless communications, making it relevant to programmable transmitter chains that require accurate frequency generation. The integrated VCO, loop filter, varactor, and resonator functions can simplify RF implementation compared with a discrete synthesizer approach. Designers should still budget for reference routing, supply decoupling, impedance matching, shielding, and output-buffer requirements, and should confirm the exact band-plan compatibility with the transmitter requirements.
Inirekomenda
RF Receiver Frequency Generation
The SI4122-BT may be used in receiver architectures that need programmable RF frequency generation for tuning or local-oscillator functions. Its 1.5 GHz listed frequency and dual-band description provide the starting point for matching the receiver’s RF plan. The available data does not include phase-noise, tuning-step, spur, or sensitivity figures, so the receiver’s adjacent-channel and blocking requirements must be verified before selecting the device.
Inirekomenda
Programmable RF Test and Measurement Equipment
The SI4122-BT can be considered for programmable RF test equipment when the instrument needs a compact, integrated frequency-synthesizer function. Its 2.7 V to 3.6 V operating range and 18 mA typical supply current are useful constraints for compact instrument designs. For measurement accuracy, validate output level, frequency accuracy, tuning resolution, phase noise, spurious response, and calibration requirements; these specifications were not available in the verified search data.
Inirekomenda
Embedded Wireless Sensor and IoT Module
The SI4122-BT may suit embedded wireless modules that require programmable RF generation within a compact 24-pin TSSOP footprint. The listed package width of 4.40 mm and integrated synthesizer functions can help reduce board-level RF component count, while the 1 µA standby current is relevant to low-power designs. Confirm whether the standby state preserves required state, how firmware controls power-down, and whether the RF performance meets the module’s emission and reception requirements.
Inirekomenda
Buod ng mga Inirekomendang Produkto
Impormasyon ng Talumpati sa Engineering for SI4122-BT — ikabit, gabay sa disenyo, at impormasyon ng pagsunod sa kautusan.
Paunawang Hanapin
Ikabit sa Mga Alternatibo
| Parametro | Ito ang Producto | SI4122-D-GT | SI4112-BT | SI4133-BT | SI4136-BT | SI4122-D-GTR |
|---|---|---|---|---|---|---|
| Package | 24-pin TSSOP | TSSOP-24 | TSSOP-24 | TSSOP-24 | TSSOP-24 | TSSOP-24 |
| Brand | Silicon Labs | Skyworks Solutions | Skyworks Solutions | Silicon Labs | Silicon Labs | Skyworks Solutions |
| Product Type | Frequency synthesizer IC | RF synthesizer | RF synthesizer | RF synthesizer | RF synthesizer | RF synthesizer |
| Mounting Style | SMD/SMT | SMD/SMT | SMD/SMT | SMD/SMT | SMD/SMT | SMD/SMT |
Pangunahing mga Pagkakaiba
- Integrated dual-band RF synthesis architecture (kumpara saSI4122-D-GT)
- Low reported standby current (kumpara saSI4112-BT)
- Integrated RF support blocks (kumpara saSI4133-BT)
- Documented 1:2 input-to-output ratio (kumpara saSI4136-BT)
Talaan ng Disenyo
Treat the RF synthesizer as a high-frequency RF layout block rather than a general-purpose digital IC. Keep the reference, VCO, resonator, and output paths short and controlled, provide a continuous ground reference, and follow the manufacturer’s recommended decoupling and keep-out geometry. The verified data does not include a complete reference PCB layout, so these details must be taken from the current datasheet.
Budget the supply rail around the reported 2.7 V to 3.6 V operating range and 18 mA typical supply current. Add local high-frequency decoupling close to the device and verify startup, standby, and power-down behavior in firmware. Estimated: using the reported 18 mA typical current at 3.3 V gives a nominal 59.4 mW operating power, before regulator losses, I/O loading, and frequency-dependent effects.
Do not substitute a generic TSSOP-24 frequency synthesizer solely because the package matches. Confirm pin assignment, reference-input requirements, frequency bands, RF output topology, loop-filter implementation, supply sequencing, and calibration requirements. The supplied cross-reference data identifies related TSSOP-24 parts but does not establish manufacturer-confirmed pin-to-pin equivalence.
RF synthesizer outputs can create unwanted harmonics and conducted or radiated emissions, especially when the reference and RF paths are poorly isolated. Use controlled return paths, maintain separation between sensitive receiver nodes and synthesizer RF routing, and validate the assembled board with the intended reference clock and antenna or load. The available data does not provide conducted-emission, spur, or phase-noise limits.
Impormasyon ng Pagsunod sa Kautusan
The verified data identifies MSL Level 3 with a 168-hour floor life and HTSUS code 8542.39.0001. RoHS, REACH, lead-free, halogen-free, and conflict-minerals statuses were not supplied and remain unknown.
