ZXCT1009
HIGH-SIDE CURRENT MONITOR
ZXCT1009
Document number: DS33441 Rev. 12 - 2
6 of 8
www.diodes.com
April 2011
?Diodes Incorporated
Application Information (cont.)
PCB trace shunt resistor for low cost solution
The figure below shows output characteristics of the device
when using a PCB resistive trace for a low cost solution in
replacement for a conventional shunt resistor. The graph shows
the linear rise in voltage across the resistor due to the PTC of
the material and demonstrates how this rise in resistance value
over temperature compensates for the NTCof the device.
The figure opposite shows a PCB layout suggestion. The
resistor section is 25mm x 0.25mm giving approximately 150m&
using 1oz copper. The data for the normalised graph was
obtained using a 1A load current and a 100& output resistor. An
electronic version of the PCB layout is available through Diodes
applications group.
Effect of Sense Resisitor Material
on Temperature Performance
Layout shows area of shunt resistor compared to SOT23
package. Not actual size.
Ordering Information
Device
AEC-Q100
level
Reel
Size
Tape Width
Quantity per Reel
Part Marking
Package
ZXCT1009FTA
Grade 3
7
8mm
3000 Units
109
SOT23
ZXCT1009F-7
None
7
8mm
3000 Units
109
SOT23
ZXCT1009T8TA
None
7
12mm
1000 Units
ZXCT1009
SM8
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