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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ACS70310 датащи(PDF) 11 Page - Allegro MicroSystems |
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ACS70310 датащи(HTML) 11 Page - Allegro MicroSystems |
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11 / 27 page  Very High Precision, Programmable Linear Hall-Effect Sensor IC with Reverse Battery Protection and High-Bandwidth (240 kHz) Analog Output for Core-Based Current Sensing ACS70310 11 Allegro MicroSystems 955 Perimeter Road Manchester, NH 03103-3353 U.S.A. www.allegromicro.com FUNCTIONAL DESCRIPTIONS Power-On Reset (POR) The descriptions in this section assume: Temperature = 25°C, no output load (RL, CL), and no significant magnetic field is present. When the device is off, the output will be in a high-impedance state. Power-On As VCC ramps up, the device output is in high impedance until VCC reaches VPOR(H). As VCC rises above VPOR(H), the device’s output leaves the high impedance state and enters normal operat- ing mode. Overvoltage Detection (VOVD) When VCC is raised above the Overvoltage Detection enable volt- age (VOVD(EN)), the ACS70310 output stage enters high imped- ance. VOUT will float: to VCC with a pull-up RL, or to GND with a pull-down RL, when VOVD(EN) is reached. When programing the ACS70310, Overvoltage Detection must be active for com- munication. The ACS70310 output will resume normal operation after VCC is below the Overvoltage Detection disable voltage VOVD(DIS). Note that Supply Voltage limits still apply for operat- ing characteristic. Power-Down As VCC ramps down, the device output is active until VCC falls below VPOR(L). As VCC falls below VPOR(L), the device’s output will enter a high impedance state. Power On/Off Profile Figure 8 shows the analog output of a device at power on and power off. Figure 8: Power On/Off and Overvoltage Detection (OVD), no RL VCC = C1 (yellow), VOUT = C2 (red), ICC = C4/10 (green) |
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