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STM8L151C4 数据表(PDF) 82 Page - STMicroelectronics |
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STM8L151C4 数据表(HTML) 82 Page - STMicroelectronics |
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82 / 101 page ![]() Electrical parameters STM8L151xx, STM8L152xx 82/101 Doc ID 15962 Rev 2 VLCD external capacitor (STM8L152xx only) The application can achieve a stabilized LCD reference voltage by connecting an external capacitor CEXT to the VLCD pin. CEXT is specified in Table 39. 8.3.9 Embedded reference voltage 8.3.10 Temperature sensor Table 40. Reference voltage characteristics(1) Symbol Parameter Min Typ Max. Unit IREFINT Internal reference voltage consumption 1.4 µA TS_VREFINT ADC sampling time when reading the internal reference voltage(2) 510 µs IBUF Internal reference voltage buffer consumption (used for ADC) 13.5 25 µA VREFINT out Reference voltage output TBD 1.225 TBD V VREFINT_DIV1 1/4 reference voltage 25 %VREFINT_COMP VREFNT_DIV2 1/2 reference voltage 50 VREFNT_DIV3 3/4 reference voltage 75 ILPBUF Internal reference voltage low power buffer consumption (used for comparators or output) 730 1200 nA IREFOUT Buffer ouptut current(3) 1µA CREFOUT Reference voltage output load 50 pF tVREFINT Internal reference voltage startup time 2 TBD ms tBUFEN Internal reference voltage buffer startup time once enabled (2) 10 µs ACCVREFINT Accuracy of VREFINT stored in engibyte ± 5 mV STABVREFINT Stability of VREFINT in temperature 20 50 ppm/°C STABVREFINT Stability of VREFINT after 1000 hours TBD ppm 1. Based on characterization results, unless otherwise specified 2. Defined when ADC output reaches its final value ±1/2LSB 3. To guaranty less than 1% VREFOUT deviation Table 41. TS characteristics(1) Symbol Parameter Min Typ Max. Unit V25 Sensor reference voltage at 25°C TBD 0.495 TBD V TL VSENSOR linearity with temperature TBD TBD °C Avg_slope Average slope TBD TBD TBD mV/°C IDD(TEMP) Consumption 3.4 6 µA |
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