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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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S2-LPS датащи(PDF) 17 Page - STMicroelectronics |
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S2-LPS датащи(HTML) 17 Page - STMicroelectronics |
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17 / 73 page  Parameter Test conditions Min. Typ. Max. Unit VDD+ 0.1 Low level output voltage IOL = +2.0 mA (+4.0 mA into high output current mode). 0.5 V CSn low to positive edge on SCLK in low power mode state 40 µs CSn low to positive edge on SCLK in ready state 30 ns 3.11 Battery indicator Characteristics measured over recommended operating conditions unless otherwise specified. All typical values are referred to 25 °C temperature, VBAT = 3.0 V. Table 27. Battery indicator and low battery detector Parameter Test conditions Min. Typ. Max. Unit Battery level thresholds #1 2.1 V Battery level thresholds #2 2.3 Battery level thresholds #3 2.5 Battery level thresholds #4 2.7 Brownout threshold Measured in slow battery variation (static) conditions (inaccurate mode) 1.5 Measured in slow battery variation (static) conditions (accurate mode) 1.7 Brownout threshold hysteresis 70 mV Note: For battery-powered equipment, the TX does not transmit at a wrong frequency under low battery voltage conditions. It remains on either channel or stops transmitting. The latter can of course be realized by using a lock detect and/or by switching off the PA under control of the battery monitor. For testing reasons this control is enabled/disabled by SPI. S2-LPS Battery indicator DS13831 - Rev 1 page 17/73 |
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