Description
Never hunt around for another crystal again, with the Si5351C clock generator breakout from Adafruit! This chip has a precision temperature compensated (TCXO) 25MHz crystal reference and internal PLL and dividers so it can generate just about any frequency, from 2.5 KHz up to 200 MHz on CLK0-CLK5, and about 20 kHz to 50 Mhz on CLK6 and CLK7.
The Si5351C clock generator is an I2C controller clock generator with eight outputs. It uses the onboard precision clock - or an external clock - to drive multiple PLL's and clock dividers using I2C instructions. By setting up the PLL and dividers you can create precise and arbitrary frequencies. There are eight independent outputs, and each one can have a different frequency. Outputs are 3Vpp by default but can be configured to be lower via the VDDA/B/C/D breakout pads. The outputs can be accessed either through a breadboard-friendly header or, for RF work, optional edge-launch SMA connector for alternating outputs - so 4 total. The edge launch SMA connectors are sold separately.
To get you going fast, we spun up a custom-made PCB in the STEMMA QT form factor, making it easy to interface with. The STEMMA QT connectors on either side are compatible with the SparkFun Qwiic I2C connectors. This allows you to make solderless connections between your development board and the Si5351 or to chain it with a wide range of other sensors and accessories using a compatible cable. Onboard 3.3V LDO and level shifters means its ready for use with 3V or 5V power and logic!
Technical Details
Si5351C specifications:
- Generates up to eight non-integer-related frequencies from 2.5 kHz to 200 MHz (20 kHz to 150 MHz on CLK6 & CLK7)
- I2C user definable configuration
- Exact frequency synthesis at each output (0 ppm error)
- Highly linear VCXO
- Optional clock input (CLKIN)
- Low output period jitter: < 70 ps pp, typ
- Configurable spread spectrum selectable at each output
- Supports static phase offset
- Programmable rise/fall time control
- Glitchless frequency changes
- Excellent PSRR eliminates external power supply filtering
- Very low power consumption
- PCIE Gen 1 compatibleSupports HCSL compatible swing
1XTW25000MAA TCXO specifications (Frequency Stability)
- Tolerance After 2 times reflow, Ref. to nominal frequency: ±1.5 ppm
- vs Temperature TA=-30~+85C, Ref. to frequency (TA=+25C): ±0.5 ppm
- vs Supply Voltage VCC=+3.3V±5%: ±0.2 ppm
- vs Load Variation LOAD_R//C=(10kΩ//10pF)±10%: ±0.2 ppm
- vs Aging TA=Room ambient: ±1.0 ppm/year
Product Dimensions: 46.0mm x 17.7mm x 4.8mm / 1.8" x 0.7" x 0.2"
Product Weight: 0.0g / 0.0oz
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