DLPS206 May 2021 DLPC7540
PRODUCTION DATA
PARAMETER | CRYSTAL A | CRYSTAL B | UNIT |
---|---|---|---|
Crystal circuit configuration | Parallel resonant | Parallel resonant | |
Crystal type | Fundamental (first harmonic) | Fundamental (first harmonic) | |
Crystal nominal frequency | 40 | 38 | MHz |
Crystal frequency tolerance (1) | ±100 (200 p-p max) | ±100 (200 p-p max) | PPM |
Crystal equivalent series resistance (ESR) | 60 (Max) | 60 (Max) | Ω |
Crystal load capacitance | 20 (Max) | 20 (Max) | pF |
Crystal Shunt Load capacitance | 7 (Max) | 7 (Max) | pF |
Temperature range | -40°C to +85°C | -40°C to +85°C | °C |
Drive level | 100 (Nominal) | 100 (Nominal) | µW |
RFB feedback resistor (nominal) | 1Meg (Nominal) | 1Meg (Nominal) | Ω |
CL1 external crystal load capacitor | See equation in (2) | See equation in (2) | pF |
CL2 external crystal load capacitor | See equation in (3) | See equation in (3)(3) | pF |
PCB layout | A ground isolation ring around the crystal is recommended | A ground isolation ring around the crystal is recommended |
PARAMETER | MIN | NOM | MAX | Units | |
---|---|---|---|---|---|
Cstray_pll_refclkA_i | Sum of package and PCB stray capacitance at REFCLKA_I | 4.5 | pF | ||
Cstray_pll_refclkA_o | Sum of package and PCB stray capacitance at REFCLKA_O | 4.5 | pF | ||
Cstray_pll_refclkB_i | Sum of package and PCB stray capacitance at REFCLKB_I | 4.5 | pF | ||
Cstray_pll_refclkB_o | Sum of package and PCB stray capacitance at REFCLKB_O | 4.5 | pF |
The crystal circuits in the DLPC7540 have dedicated power (VAD33_OSCA and VAD33_OSCB) pins, with the recommended filtering for each shown in Figure 10-11, and recommended values shown in Table 10-1
MANUFACTURER | PART NUMBER | NOMINAL FREQUENCY | FREQUENCY TOLERANCE, FREQUENCY STABILITY, AGING/YEAR | ESR | LOAD CAPACITANCE | OPERATING TEMPERATURE | Drive Level |
---|---|---|---|---|---|---|---|
TXC | 7M38070001 (1) | 38 MHz | Freq Tolerance: ±20 ppm | 30Ω max | 12 pF | –40°C to +85°C | 100µW |
Freq Stability: ±20 ppm | |||||||
Aging/Year: ±3 ppm | |||||||
TXC | 7M40070041 (2) | 40 MHz | Freq Tolerance: ±20 ppm | 30Ω max | 12 pF | –40°C to +85°C | 100µW |
Freq Stability: ±20 ppm | |||||||
Aging/Year: ±3 ppm |