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STLC2150 bảng dữ liệu(PDF) 8 Page - STMicroelectronics |
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STLC2150 bảng dữ liệu(HTML) 8 Page - STMicroelectronics |
8 / 10 page STLC2150 8/10 Crystal oscillator An on-chip crystal oscillator provides a 13MHz master clock. The external crystal must be connected to the pads XTAL13I and XTAL13O. The frequency specification of ±20 ppm can be achieved by 2 different ways: 1. by external components choice (default); 2. by internal tuning (with internal capacitors as defined by the control word stored in the registers. The control word allows modifying the value of the capacitor connected to the oscillator pads. The total capac- itance (including the parasitic capacitors) must be about 16 pF. The variable capacitor is implemented as a capacitor array of about 255 x 90 fF. External crystal example 1) Temperaure range is defined by application needs. Low power clock The STLC2150 can provide 3.2 or 32 KHz, low power clock for baseband chip operation in Hold, Snif and Park modes. External reference frequency The STLC2150 can take a digital clock from external source 13 MHz on the CLK13MHZ pin. The IC also can use an analogue (sine wave, from 0.2 up to 1 Vpp) clock from external 13 MHz source on the XTAL13I pin. Registers description To provide operational control, configuration flexibility (e.g. clock configuration, XTAL trimming) and to set max- imum performance the STLC2150 has a bank of registers. Detailed description is available in “STLC2150: In- terface and Programming Guide”. Parameter Value Unit tolerance Comment Frequency 13.000000 MHz ± 10 ppm At 25 °C ± 3 °C Mode Fundamental Drive level 100 µW± 20 Temp drift ±10 ppm Referred to value at 25°C over temperature range 1) Aging ±1 Ppm/year max Cload 16.0 pF ± 1 % Rseries 40 Ω max C0 1.7 pF ± 20 % Shunt capacitance C1 6.5 pF ± 24 % Motional capacitance Rins 500 M Ω min Insulation resistance Pull_sens 10 Ppm ± 20 % (16 pF) Activity Dips ± 0.5 Ppm / °C max Temperature range 1) |
Số phần tương tự - STLC2150 |
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Mô tả tương tự - STLC2150 |
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