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INA213AIDCKTG4 Datasheet(PDF) 9 Page - Texas Instruments |
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INA213AIDCKTG4 Datasheet(HTML) 9 Page - Texas Instruments |
9 / 30 page INA21x V+ OUT GND IN- IN+ C BYPASS 0.01mF to 0.1mF +2.7Vto+26V REF Reference Voltage Supply Load R SHUNT Output R 1 R 3 R 2 R 4 INA210, INA211 INA212, INA213 INA214 www.ti.com SBOS437E – MAY 2008 – REVISED JUNE 2013 APPLICATION INFORMATION BASIC CONNECTIONS Figure 23 shows the basic connections of the INA210-INA214. The input pins, IN+ and IN–, should be connected as closely as possible to the shunt resistor to minimize any resistance in series with the shunt resistance. Figure 23. Typical Application Power-supply bypass capacitors are required for stability. Applications with noisy or high impedance power supplies may require additional decoupling capacitors to reject power-supply noise. Connect bypass capacitors close to the device pins. On the RSW package, two pins are provided for each input. These pins should be tied together (that is, tie IN+ to IN+ and tie IN– to IN–). POWER SUPPLY The input circuitry of the INA210-INA214 can accurately measure beyond its power-supply voltage, V+. For example, the V+ power supply can be 5V, whereas the load power supply voltage can be as high as +26V. However, the output voltage range of the OUT terminal is limited by the voltages on the power-supply pin. Note also that the INA210-INA214 can withstand the full –0.3V to +26V in the input pins, regardless of whether the device has power applied or not. SELECTING RS The zero-drift offset performance of the INA210-INA214 offers several benefits. Most often, the primary advantage of the low offset characteristic enables lower full-scale drops across the shunt. For example, non- zero-drift current shunt monitors typically require a full-scale range of 100mV. The INA210-INA214 series gives equivalent accuracy at a full-scale range on the order of 10mV. This accuracy reduces shunt dissipation by an order of magnitude with many additional benefits. Alternatively, there are applications that must measure current over a wide dynamic range that can take advantage of the low offset on the low end of the measurement. Most often, these applications can use the lower gain INA213 or INA214 to accommodate larger shunt drops on the upper end of the scale. For instance, an INA213 operating on a 3.3V supply could easily handle a full-scale shunt drop of 60mV, with only 100 μV of offset. Copyright © 2008–2013, Texas Instruments Incorporated Submit Documentation Feedback 9 Product Folder Links: INA210 INA211 INA212 INA213 INA214 |
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