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INA280-Q1 データシート(PDF) 18 Page - Texas Instruments |
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INA280-Q1 データシート(HTML) 18 Page - Texas Instruments |
18 / 25 page 9 Power Supply Recommendations The input circuitry of the INA280-Q1 device can accurately measure beyond the power-supply voltage. The power supply can be 20 V, whereas the load power-supply voltage at IN+ and IN– can go up to 120 V. The output voltage range of the OUT pin is limited by the voltage on the V S pin and the device swing to supply specification. 10 Layout 10.1 Layout Guidelines TI always recommends to follow good layout practices: • Connect the input pins to the sensing resistor using a Kelvin or 4-wire connection. This connection technique makes sure that only the current-sensing resistor impedance is detected between the input pins. Poor routing of the current-sensing resistor commonly results in additional resistance present between the input pins. Given the very low ohmic value of the current resistor, any additional high-current carrying impedance can cause significant measurement errors. • Place the power-supply bypass capacitor as close to the device power supply and ground pins as possible. The recommended value of this bypass capacitor is 0.1 µF. Additional decoupling capacitance can be added to compensate for noisy or high-impedance power supplies. • When routing the connections from the current-sense resistor to the device, keep the trace lengths as short as possible. 10.2 Layout Example 4 2 IN± OUT Current Sense Output GND Load VIA to Ground Plane Power Supply, VS (2.7 V to 20 V) CBYPASS 5 1 IN+ VS 3 RSENSE Direction of Current Flow Bus Voltage TI Device Figure 10-1. Recommended Layout for INA280-Q1 INA280-Q1 SBOSA48 – NOVEMBER 2020 www.ti.com 18 Submit Document Feedback Copyright © 2020 Texas Instruments Incorporated Product Folder Links: INA280-Q1 |
同様の部品番号 - INA280-Q1 |
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同様の説明 - INA280-Q1 |
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