INA169 Analog DC Current Sensor Module - 60V 5A Max

Analog DC Current Sensor Module - INA169 - 60V 5A Max

In current monitoring applications, instead of dealing with a multimeter, you can use this circuit to monitor the DC current drawn and have a useful output with chassis ground. Thanks to the analog output, you get an ideal tool for feedback control.

Most current measuring devices, including the ammeter panel we produce, measure low side. This brings the necessity of using a measurement resistor between the chassis of the circuit in which the measurement is made and the chassis of the device in applications without batteries. In such a case, problems can be encountered because electronic circuits are often affected by the change in the ground reference with the current drawn. The INA169 used in our circuit offers a smart solution to this situation and can measure high side current up to + 60V.

A precision amplifier measures the voltage between the legs of a 0.1ohm resistor with a 1% tolerance. The resistor is capable of continuously lifting 2W, so you can measure up to +5 amps continuously. A 10k resistor at the output of the circuit converts the output current to voltage. The output voltage is 1V for 1A. For example, when 2A is pulled, the output voltage will be 2V.

If you want to change the output resistance to achieve different voltage ranges, you can also cut the copper paths and install a resistor of the desired value. For example, if you plug in a 20k resistor, you'll get 2V per amp. A 5k resistor will give 0.5V per amp.

Next to the plate, a 5-pin header is provided (for sensor connections). You can also connect and separate the load by using the 3.5mm connector on the circuit.

INA169 Analog DC Current Sensor Module - 60V 5A Max Specifications

• 1 ohm 1% 2W current sensing resistance
• Up to + 60V target voltage

Documents

• INA169 Analog DC Current Sensor Module DatasheetCheck the file.