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AD8219BRMZ-RL датащи(PDF) 11 Page - Analog Devices |
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AD8219BRMZ-RL датащи(HTML) 11 Page - Analog Devices |
11 / 12 page AD8219 Rev. A | Page 11 of 12 APPLICATIONS INFORMATION HIGH-SIDE CURRENT SENSING In this configuration, the shunt resistor is referenced to the battery (see Figure 28). High voltage is present at the inputs of the current sense amplifier. When the shunt is battery referenced, the AD8219 produces a linear ground referenced analog output. +IN ILOAD SHUNT GND –IN 4V TO 80V AD8219 OUT VS LOAD Figure 28. Battery Referenced Shunt Resistor Figure 28 shows the supply pin, VS, connected directly to the positive input (+IN) pin. In this mode, the internal LDO powers the AD8219 as long as the common-mode voltage at the input pins is 4 V to 80 V. Additionally, VS can also be connected to a standalone supply that can vary from 4 V to 80 V as shown in Figure 29. +IN ILOAD SHUNT GND –IN AD8219 OUT VS 4V TO 80V 4V TO 80V LOAD Figure 29. Standalone Supply Operation MOTOR CONTROL CURRENT SENSING The AD8219 is a practical, accurate solution for high-side current sensing in motor control applications. In cases where the shunt resistor is referenced to a battery and the current flowing is unidirectional (as shown in Figure 30), the AD8219 monitors the current with no additional supply pin necessary provided the battery voltage in the following circuit is in the 4 V to 80 V range. +IN GND –IN BATTERY MOTOR IMOTOR AD8219 OUT VS Figure 30. High-Side Current Sensing in Motor Control |
Аналогичный номер детали - AD8219BRMZ-RL |
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Аналогичное описание - AD8219BRMZ-RL |
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