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ST7L09 数据表(PDF) 76 Page - STMicroelectronics |
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ST7L09 数据表(HTML) 76 Page - STMicroelectronics |
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76 / 104 page  ST7L05, ST7L09 76/104 OPERATING CONDITIONS (Cont’d) The RC oscillator and PLL characteristics are temperature-dependent and are grouped in two tables. Operating conditions (tested for TA = -40 to +105°C) @ VDD = 4.5 to 5.5V Notes: 1. If the RC oscillator clock is selected, to improve clock stability and frequency accuracy, it is recommended to place a decoupling capacitor, typically 100nF, between the VDD and VSS pins as close as possible to the ST7 device. 2. See “INTERNAL RC OSCILLATOR ADJUSTMENT” on page 23 3. Minimum value is obtained for hot temperature and maximum value is obtained for cold temperature. 4. Data based on characterization results, not tested in production. 5. Measurement made with RC calibrated at 1 MHz. 6. Guaranteed by design. 7. Averaged over a 4ms period. After the LOCKED bit is set, a period of tSTAB is required to reach ACCPLL accuracy. 8. After the LOCKED bit is set ACCPLL is max. 10% until tSTAB has elapsed. See Figure 11 on page 23. Operating conditions (tested for TA = -40 to +105°C) @ VDD = 3.0 to 3.6V 1) Notes: 1 Data based on characterization results, not tested in production. 2 If the RC oscillator clock is selected, to improve clock stability and frequency accuracy, it is recommended to place a decoupling capacitor, typically 100nF, between the VDD and VSS pins as close as possible to the ST7 device. 3. See “INTERNAL RC OSCILLATOR ADJUSTMENT” on page 23. 4. Minimum value is obtained for hot temperature and maximum value is obtained for cold temperature. 5. Measurement made with RC calibration at 1 MHz. 6. Guaranteed by design. 7. Averaged over a 4ms period. After the LOCKED bit is set, a period of tSTAB is required to reach ACCPLL accuracy. 8. After the LOCKED bit is set ACCPLL is max. 10% until tSTAB has elapsed. See Figure 11 on page 23. Symbol Parameter Conditions Min Typ Max Unit fRC 1) Internal RC oscillator frequency RCCR = FF (reset value), TA = 25°C, VDD =5V 760 kHz RCCR = RCCR02 ), TA = 25°C, VDD = 5V 995 1000 1005 ACCRC Accuracy of internal RC oscillator when calibrated with RCCR = RCCR02)3) TA = 25°C, VDD = 5V -0.5 +0.5 % TA = 25°C, VDD = 4.5 to 5.5V 4) -1 +1 TA = -40 to +105°C, VDD = 4.5 to 5.5V 4) -5 +2 IDD(RC) RC oscillator current consumption TA = 25°C, VDD = 5V 9704)5) µA tsu(RC) RC oscillator setup time TA = 25°C, VDD = 5V 102) µs fPLL x8 PLL input clock 1 MHz tLOCK PLL lock time8) 2 ms tSTAB PLL stabilization time8) 4 ACCPLL x8 PLL accuracy fRC =1 MHz@ TA = -40 to +105°C 0.17) % JITPLL PLL jitter ( ∆f CPU/fCPU)1 6) IDD(PLL) PLL current consumption TA = 25°C 6004) µA Symbol Parameter1) Conditions Min Typ Max Unit fRC Internal RC oscillator frequency RCCR = FF (reset value), TA = 25°C, VDD = 3.3V 560 kHz RCCR = RCCR13), TA = 25°C, VDD = 3.3V 700 ACCRC Accuracy of internal RC oscillator when calibrated with RCCR = RCCR13)4) TA = -40 to +105°C -15 +15 % IDD(RC) RC oscillator current consumption TA =25°C, VDD =3.3V 7005) µA tsu(RC) RC oscillator setup time 103) µs 1 |
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