{"id":10776,"date":"2021-01-11T22:24:27","date_gmt":"2021-01-11T22:24:27","guid":{"rendered":"https:\/\/wolles-elektronikkiste.de\/ina282-current-sensor"},"modified":"2024-10-29T13:18:30","modified_gmt":"2024-10-29T13:18:30","slug":"ina282-current-sensor","status":"publish","type":"post","link":"https:\/\/wolles-elektronikkiste.de\/en\/ina282-current-sensor","title":{"rendered":"INA282 Current Sensor"},"content":{"rendered":"\n

About this post<\/h2>\n\n

In this last (yes, really!) article about current sensors I will report on the INA282. In terms of its characteristics, the INA282 can be classified as follows in the series of current sensors discussed so far:<\/p>\r\n\n

Sensor<\/strong><\/td>INA282<\/td>INA219<\/a><\/td>INA226<\/a><\/td>Self-built<\/a><\/td>ACS712<\/a><\/td>MAX471<\/a><\/td><\/tr>
Measuring<\/strong>principle<\/strong><\/td>externalshunt<\/td>externalshunt<\/td>externalshunt<\/td>external shunt<\/td>Hall-effect<\/td>internal shunt<\/td><\/tr>
Signal <\/strong><\/td>analog<\/td>digital (I2C)<\/td>digital (I2C)<\/td>analog<\/td>analog<\/td>analog<\/td><\/tr><\/tbody><\/table>
Table 1: Overview of the current sensors discussed so far<\/figcaption><\/figure>\n\n

“External” shunt means that the shunt is not on the IC, but on the modules.<\/p>\r\n

As with previous articles on this topic, I will first discuss the technical characteristics of INA282. Then I show how you operate it with an Arduino (UNO), create a calibration line and finally how you measure the power in addition to the current. I have already shown the latter with other modules, but each post should be understandable on its own if possible.<\/p>\r\n\n

Technical characteristics<\/h2>\n\n
\"An<\/a>
An INA282 module<\/figcaption><\/figure>\n\n

The INA282 determines the current by amplifying the voltage drop across a shunt<\/a> (low-impedance resistor for measuring currents) and outputting it at pin OUT. To do this, it uses a gain factor of 50 V\/V. The INA282 also has a few siblings with higher gain factors: <\/p>\r\n