HiLetgo Si5351A I2C 25MHZ I2C High Frequency Signal Generator Breakout Board Square Wave Frequency Generator Signal Generator 8KHz to 160MHz 3-5VDC
Description
- This chip has a precision 25MHz crystal reference and internal PLL and dividers.
- It can generate just about any frequency, from <8KHz up to 150+ MHz.
- The Si5351 is an I2C configurable clock generator that is ideally suited for replacing crystals, crystal oscillators, VCXOs, phase-locked loops (PLLs), and fanout buffers in cost-sensitive applications.
- It uses the onboard precision clock to drive multiple PLL's and clock dividers using I2C instructions.
- Outputs are 3Vpp, either through a breadboard-friendly header or, for RF work, an optional SMA connector.
HiLetgo Si5351A I2C 25MHZ I2C High Frequency Signal Generator Breakout Board Square Wave Frequency Generator Signal Generator 8KHz to 160MHz 3-5VDC
Reviews
M**.
Ottimo prodotto
Funziona perfettamente. Per i principianti e' indispensabile l'uso di librerie e programmi di esempio gia' pronti (Arduino o altro). Scrivere in C o C++ le funzioni per gestire via I2C l'impostazione delle frequenze e' piuttosto complicato e richiede una conoscenza approfondita del funzionamento del dispositivo.
R**O
ottima schedina per sperimentazioni varie
La schedina arriva con i connettori dupont e gli sma da saldare.Per che non lo sapesse è in grado di trasmettere radiofrequenza con circa 10mw.Lo sto usando per test su beacon radioamatoriale a 144mhz
M**O
Funziona correttamente come descritto, il chip ha 2 VCO e 3 uscite.
Una volta collegato all'Arduino Atmega 2560 ha funzionato al primo colpo utilizzando le librerie AdaFruit quindi è totalmente compatibile.Consiglio di scaricare sal sito della SI il programma che calcola i fattori di moltiplicazione e di divisione per ottenere in uscita le frequenze desiderate.
B**O
Ottimo
Il prodotto è conforme alla descrizione. Buon prezzo e arrivo estremamente veloce.
;**)
Caveat emptor!
This device came as shown, but the SMA connectors are not soldered in place. The image does not show solder on the SMA connectors, so whomever took the photos probably dry fit it together. Not necessarily a bad thing, but a bit misleading .The device requires configuration, every time it is started (there is Arduino code to do this).Default behavior is to wait for configuration - no output.Where all clocks come from a PLL, sometimes there is a good bit of jitter.The base oscillator is a crystal. There is no direct way to tie the crystal to the output. All clocks must go through a PLL (or similar) to be multiplied 15 to 90 times. Then to a (4/6/8) divider. To get 25 MHz another divider is necessary.There does not seem to be a published process to burn the OTP NVRAM.The proprietary software from the manufacturer is substantial, but lacks practical details - like what cable to use to connect to the device.The datasheet is - enigmatic. A few more details in the block diagrams would be nice.It is not clear what the device was developed for, perhaps some sort of VHF radio...This device is an odd duck...
Common Questions
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