DLPS253 September 2024 DLPC8445
PRODUCTION DATA
PARAMETER | CRYSTAL | UNIT |
---|---|---|
Crystal circuit configuration | Parallel resonant | |
Crystal type | Fundamental (first harmonic) | |
Crystal nominal frequency | 40 | MHz |
Crystal frequency tolerance (1) | ±100 (200 p-p max) | PPM |
Crystal equivalent series resistance (ESR) | 60 (Max) | Ω |
Crystal load capacitance | 20 (Max) | pF |
Crystal Shunt Load capacitance | 7 (Max) | pF |
Temperature range | –40°C to +85°C | °C |
Drive level | 100 (Nominal) | µW |
CL1 external crystal load capacitor | See equation in (2) | pF |
CL2 external crystal load capacitor | See equation in (3) | pF |
PCB layout | A ground isolation ring around the crystal is recommended. |
PARAMETER | MIN | NOM | MAX | UNIT | |
---|---|---|---|---|---|
Cstray_pll_refclk_i | Sum of package and PCB stray capacitance at REFCLKA_I | 0.4 | pF | ||
Cstray_pll_refclk_o | Sum of package and PCB stray capacitance at REFCLKA_O | 0.4 | pF |
The crystal circuits in the DLPC8445 have dedicated power (VDDS18_OSC) pins, with the recommended filtering for each shown in Figure 8-2, and recommended values shown in DLPC8445 Recommended Crystal Parts.
MANUFACT- URER |
PART NUMBER | NOMINAL FREQUENCY | FREQUENCY
TOLERANCE, FREQUENCY STABILITY, AGING/YEAR |
ESR | LOAD CAPACITANCE | OPERATING TEMPERATURE | DRIVE LEVEL |
---|---|---|---|---|---|---|---|
TXC | 7M40070041 (1) | 40MHz | Freq Tolerance: ±20ppm |
30Ω max | 12pF | –40°C to +85°C | 100µW |
Freq Stability: ±20ppm |
|||||||
Aging/Year: ±3ppm |