Product category:
Analogue and Mixed Signal ICs
News Release from: Zetex | Subject: ZXCT1020 series current monitor
Edited by the Electronicstalk Editorial
Team on 17 June 2003
Frugal accuracy from current monitor ICs
For high load current sensing, the low offset of the ZXCT1020 series current monitor ensures an accuracy of +/-2% for a sense voltage of just 10mV.
For high load current sensing, the low offset of the ZXCT1020 series current monitor ensures an accuracy of +/-2% for a sense voltage of just 10mV Providing enhanced measurement tolerance for the small value sense resistors required at higher currents, the ZXCT1021 and ZXCT1022 offer fixed DC voltage gains of 10 and 100, respectively
This article was originally published on Electronicstalk on 24 Jul 2008 at 8.00am (UK)
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By translating the voltage sensed across a shunt resistor into a proportional output voltage, these precision high-side current sense monitors eliminate any disruption of the ground plane when sensing load current.
The ZXCT1021/22 current monitors also remove the need for an external scaling resistor on the output.
Output voltage is simply a product of gain and input voltage.
Operating over a broad input voltage range from 2.5 to 20V, the ZXCT1020 series will support a broad range of high-current applications where minimal sense voltage is required.
The devices' typical operating current of 25uA and small footprint SOT23-5 packaging will also suit portable battery powered equipment.
As an alternative to the conventional shunt resistor, a PCB resistive trace can also be used in conjunction with the ZXCT1021 and 1022 to create a low-cost single-component current-sensing solution.
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