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INA271 Datasheet(PDF) 8 Page - Burr-Brown (TI) |
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INA271 Datasheet(HTML) 8 Page - Burr-Brown (TI) |
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8 / 17 page  www.ti.com APPLICATIONS INFORMATION BASIC CONNECTION POWER SUPPLY SELECTING R S A1 A2 Single-PoleFilter Capacitor +2.7Vto+18V 5kW 5kW 96kW RL PREOUT BUFIN GND OUT IN- IN+ V+ Load - 16Vto+80V Supply R S INA270 0.01 F m 0.1 F m INA270 INA271 SBOS381A – FEBRUARY 2007 – REVISED APRIL 2007 Figure 15 shows the basic connection of the INA270 The input circuitry of the INA270 and INA271 can and INA271. The input pins, IN+ and IN–, should be accurately measure beyond its power-supply voltage, connected as closely as possible to the shunt V+. For example, the V+ power supply can be 5V, resistor to minimize any resistance in series with the whereas the load power-supply voltage is up to shunt resistance. +80V. The output voltage range of the OUT terminal, however, is limited by the voltages on the Power-supply bypass capacitors are required for power-supply pin. stability. Applications with noisy or high-impedance power supplies may require additional decoupling capacitors to reject power-supply noise. Minimum bypass capacitors of 0.01 µF and 0.1µF in value The value chosen for the shunt resistor, RS, depends should be placed close to the supply pins. Although on the application and is a compromise between not mandatory, an additional 10mF electrolytic small-signal accuracy and maximum permissible capacitor placed in parallel with the other bypass voltage loss in the measurement line. High values of capacitors may be useful in applications with RS provide better accuracy at lower currents by particularly noisy supplies. minimizing the effects of offset, while low values of RS minimize voltage loss in the supply line. For most applications, best performance is attained with an RS value that provides a full-scale shunt voltage range of 50mV to 100mV. Maximum input voltage for accurate measurements is (VS – 0.2)/Gain. Figure 15. INA270 Basic Connections 8 Submit Documentation Feedback |
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Similar Description - INA271 |
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