Texas Instruments REF Series Current & Power Monitors & Regulators are available at Mouser Electronics. Mouser offers inventory, pricing, & datasheets for . The REF combines three circuit building-blocks on a single monolithic chip— two µA current sources and a current mirror. The sections are dielectrically. REF FEATURES. q COMPLETELY FLOATING: No Power Supply or Ground Connections q HIGH ACCURACY: ±% q LOW TEMPERATURE.

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Roll your own should be cheaper than TI and as good or better, but more work.

Ask a related question Ask a new question. Also, since the current sources are twoterminal devices, they can be used equally well as current sinks. We have no details for what variation from spec are acceptable, we could write a new question for every single part in existence and write another set for every single situation for layouts, and then we could ask again in 6 months when prices change. By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

The integrated output eliminates 2 external components. Current sourcesCurrent sinksFloating current sourcesVoltage-to-current converters transconductance amplifiers Current-to-current converters current mirrors Current-to-v Doc.

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Unlike typical boost circuits, the MAX output is completely disconnected from the input in shutdown. Coupled with the fact. ESD damage can range ref20 subtle performance degradation to complete device failure. REF datasheet I tried searching Digikey for “current source” and ordering results by price.


To make a temperature measurement system with a Doc. This is similar to the Datasheet section 8. All content and materials on this site are provided “as is”.

REF200: One REF200 device to power up two resistive sensors with 100uA

This is to read an RTD so the current must be low to prevent self-heating but accurate enough to calculate 0. Amplifier, giving me great accuracy but too expensive. I learned a lot from the short time spent looking at that requirement. Such knowledge is probably best kept from the masses. In the appendix you will find a simplified model of my idea. Independent 5V and 3.

Mentions Tags More Cancel. The PSIxxx has a far worse temperature spec 0. This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet.

An overcurrent circuit breaker senses the voltage across the drain and source terminals of an external N-channel MOSFET with no need for a sense resistor.

It saves N people looking up the same data and ensures we are looking at what you really want to replace and not something only similar. Temperature change of 1K is about 0. No license, either express or implied, by estoppel or otherwise, is granted by TI. Failure to observe proper handling and installation procedures can cause damage.


Hi Nurseda Baskent, I see no issue with this application. Trademarks Privacy Policy Terms of Use. I’m using this in conjunction with an INA Inst.

Alternative to REF Current Source – Electrical Engineering Stack Exchange

When standard IAs can not deliver the required performance, consider this enhanced version. Do you have another question? I’m using TI’s REF as a uA current source but need something cheaper with similar precision temperature stability, accuracy, etc.

An internal high-side driver. Use of the information ref020 this site may require a license from a third party, or a license from TI. If you have further questions related to this thread, you may click “Ask a related question” ref20. Burr-Brown recommends that all integrated circuits be handled with appropriate precautions. If this is no good then working up Dikgikey offerings in ascending price order or specing tightly and sorting by price shoud produce something suitable.

How many do you need, what do you want to pay, what will you pay me? Details, datasheet, quote on part number: