EL5171IS

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The EL5171IS is an adjustable precision current source designed to meet the requirements of the instrumentation and industrial control markets. It provides very low output-noise and high stability for precision applications in a wide range of input voltage (4V - 24V).

The EL5171IS is part of a family of instrumentation amplifiers from ADI, with a bridge-type architecture and multiple precision analog-to-digital converters. The unit offers the highest performance and flexibility for measurement, control and automation applications.

The EL5171IS\'s three-in-one design includes an adjustable precision current source, an adjustable voltage reference and an adjustable voltage regulator. This provides users with the flexibility to choose between three different operating modes: constant current, constant voltage and constant resistance mode.

The current source has a separate amplifier stage, which is optimized to reduce output-offset, maximum load current and output noise. The output stage drives and controls the load current and a feedback path ensures accuracy and stability. This closed-loop design drives the output current to a stable upstream voltage level, preventing load current instability, even when the load is disconnected.

The EL5171IS\'s adjustable voltage reference circuit adjusts the maximum current-sourcing level to optimize system performance. An external voltage can also be used to adjust the maximum current-sourcing level, if required. The adjustable voltage regulator circuit provides level-shifting between the reference output and the output of the current source. This is done without the need for an external power supply and without generating any noise or heat.

In addition, the EL5171IS provides several options for the control of output current, including an analog input, digital I2C control, and a digital “general purpose” communication interface via an SPI input. The SPI option provides the user with an interface to control parameters such as output current, voltage reference gain and offset, and voltage regulator parameters. This advanced level of control allows the user to optimize the performance of their application.

The EL5171IS is an ideal solution for demanding applications such as instrumentation and industrial control. The high accuracy and stability, low offset and noise, and multiple communication options make it ideal for applications requiring precise control and monitoring of current, voltage and resistance. The flexibility of the device ensures that it can be used in a variety of applications, where performance, stability and precision are critical.

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