ISL28005, ISL28006 Unidirectional Current Sense Amplifiers

PublishTime：2023-05-11

●This application note introduces the ISL28005 and ISL28006 family of highly integrated current sense amplifiers that can drastically simplify the design of complex current monitoring circuits. The application note explains the device internal two-amp topology with ground-sensing diagnostic features, discusses which gain to use in what type of applications, and provides an example of an optional transient protection scheme.
●Introduction
■The ISL28005 and ISL28006 are ground-sensing current sense amplifiers that amplify millivolt current signals developed across sub-1Ω sense resistors. The simplest type of current sense amplifiers use single stage op amp circuits that take their power from the same voltage source that generates the current to be measured. These are realized using an op amp and a handful of external components to condition the amplifier to requirements of the application. As long as the measured current signal remains within the common mode voltage range of the op amp, these circuits are simple.
■Applications where the amplifier operates from a different power source than the load adds complexity, particularly when the measured current is at voltage levels much higher than the op amp supply voltage. In many cases, an additional amplifier circuit is needed to perform the voltage translation to step-down the current sense signal to match the common mode input range of the current sense amplifier.
■Current sensing in multi-output power supply systems is one application where one or more power supply output voltages must be measured using current sense amplifiers powered from a much lower supply voltage. The ISL2800x family of current sense amplifiers are ideal for these applications because they perform precise current sensing operating from supply voltages as low as 3.3V, while sensing from supply voltages as high as 28V. These current sense amplifiers are very simple, self-contained solutions requiring only an external current sense resistor. The space-saving SOT-23 package and low component count results in very small footprint.

Brand of Product：	Renesas
Part#：	ISL28005 、 ISL28006 、 ISL28006 family 、 ISL28005 family 、 ISL28006-ADJ 、 ISL2800x 、 ISL2800x family 、 ISL2800x-20 、 ISL2800x-50 、 ISL2800x-100 More Part#
Product Category：	Unidirectional Current Sense Amplifiers 、 sub-family of lower cost amplifiers 、 single supply, uni-directional current sense amplifiers More
Application：	More
Data Type：	Application note & Design Guide More
Safety & Environment Standards：	More
Operating Temperature：	Please see the document for details
Qualification Grade：	More
Qualification Approval：	More
Package：
Language：	English Chinese Chinese and English Japanese
Date of Creation：	Feb 8, 2022
Version Number：	Rev.1.00
Data Encoding：	AN1567
Data Size：	390 KB

Data section preview(2pages)

- The full preview is over. If you want to read the whole 6 page document,please Sign in/Register -

Download

+1 Like
Add to Favorites

Recommend

Technical Resources

More>

All reproduced articles on this site are for the purpose of conveying more information and clearly indicate the source. If media or individuals who do not want to be reproduced can contact us, which will be deleted.

Integrated Circuits