The I/O capabilities built into most microcontrollers make it easy to measure the analog world. Say you want to build a data logger for temperature. All you need to do is get some kind of sensor that ...

The simple circuit in Figure 1 uses a low-current-drain MAX4073H amplifier to sense the current flowing through a 4- to 20-mA loop. The circuit senses the current through a 1Ω resistor with a fixed ...

The 4- to 20-mA current loop is ubiquitous in the world of controls in manufacturing plants. Discrete logic, microprocessors, and microcontrollers easily cover the digital portions of control schemes, ...

Using an analog temperature sensor, an op amp, a transistor, and a low-dropout linear regulator, this circuit provides a 4-to-20-mA output over a 3.75- to 28-V compliance range (see the figure).

Use of 4-to-20-mA current loops involves more than just a simple series connection between sensor, display, and power supply. The point where a sensor takes a measurement is, at times, many yards away ...

Current-mode control loops (particularly the popular 4- to 20-mA controls) are used in many industrial applications because of their immunity to induced EMI from motors, contactors, relays, and other ...

A serial transmission method that uses a closed loop. It originated with teletype machines that transmitted 20 mA (milliamperes) of current for a 1 bit and the absence of current for a 0 bit. A 60 mA ...

NORWOOD, Mass.--(BUSINESS WIRE)-- Analog Devices, Inc. (NAS: ADI) introduced today the CN0267 demonstration circuit for a loop powered HART® (Highway Addressable Remote Transducer) enabled smart ...

Each channel operates independently to prevent interaction between channels. Galvanic isolation eliminates ground loops, reduces noise, and blocks transient signals. Splitters are available in 2-wire ...