What will be the typical range of a current sensor?
Typical transducer ranges are 0–2 A up to 0–2000 A, with apertures of 0.5 in. to >3 in. (12–76 mm). Current Switches. Designed for monitoring and switching AC and DC circuits, current-operated switches integrate current sensing and signal conditioning with a limit alarm.
How is sensor current measured?
Since current always creates a magnetic field, there are Hall Effect and other sensors that allow us to measure this field and thereby measure the current. It is also possible to connect a shunt resistor within the circuit itself and directly measure the current, as in the classic ammeter and current shunt.
Which is an example of high side current sensing?
High-side current sensing is typically selected in applications where ground disturbance cannot be tolerated, and short circuit detection is required, such as motor monitoring and control, overcurrent protection and supervising circuits, automotive safety systems, and battery current monitoring.
How does a low side current sensing circuit work?
As shown in Figure 1, low-side current sensing connects the sensing resistor between the load and ground. Normally, the sensed voltage signal (VSEN =ISEN × RSEN) is so small that it needs to be amplified by subsequent op amp circuits (e.g., non- inverting amplifier) to get the measurable output voltage (VOUT).
When do I need a high side sensing monitor?
This is the basic LTC6101 high side sensing supply-monitor configuration, where the supply current drawn by the IC is included in the readout signal. This configuration is useful when the IC current may not be negligible in terms of overall current draw, such as in low power battery-powered applications.
How does an over-top current sense circuit work?
Over-The-Top Current Sense. This circuit takes advantage of the microampere supply current and rail-to-rail input of the LT1494. The circuit is simple because the supply draw is essentially equal to the load current developed through R A. This supply current is simply passed through R B to form an output voltage that is appropriately amplified.