DLPS074 February 2017 DLPC4422
PRODUCTION DATA.
PARAMETER | NOMINAL | UNIT |
---|---|---|
MOSC TO GROUND Capacitance | 1.5 | pF |
MOSCZ TO GROUND Capacitance | 1.5 | pF |
PARAMETER | RECOMMENDED | UNIT |
---|---|---|
Crystal circuit configuration | Parallel resonant | |
Crystal type | Fundamental (1st Harmonic) | |
Crystal nominal frequency | 20 | MHz |
Crystal frequency temperature stability | +/- 30 | PPM |
Overall crystal frequency tolerance (including accuracy, stability, aging, and trim sensitivity) | +/- 100 | PPM |
Crystal Equivalent Series Resistor (ESR) | 50 max | Ω |
Crystal load | 20 | pF |
Crystal shunt load | 7 max | pF |
RS drive resistor (nominal) | 100 | Ω |
RFB feedback resistor (nominal) | 1 | MΩ |
CL1 external crystal load capacitor (MOSC) | See (1) | pF |
CL2 external crystal load capacitor (MOSCN) | See (1) | pF |
PCB layout | TI recommends a ground isolation ring around the crystal. |
It is assumed that the external crystal oscillator will stabilize within 50 ms after stable power is applied.