ZXCT1022 데이터 시트보기 (PDF) - Zetex => Diodes

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ZXCT1022

Low offset high-side current monitor

Zetex => Diodes 

ZXCT1022

Application information

The ZXCT1022 has a fixed dc voltage gain of 100. No external scaling resistors are required for

the output. Output voltage is simply defined as:

VOUT = 100 x VSENSE (V)

Where VSENSE = VIN - VLOAD

PCB trace shunt resistor for low cost solution

Figure 1 shows a PCB layout suggestion for a low cost solution where a PCB resistive trace in

replacement for a conventional shunt resistor, can be used. The resistor section is 25mm x

0.25mm giving approximately 150m⍀ using 1 oz copper. Smaller resistances can be used if

required.

Total circuit solution: 1 component. Shows area of 150m⍀

sense resistor compared to SOT23 package.

ZXCT1021/2

Practical tolerance of the PCB resistor will be around 5%

depending on manufacturing methods.

GND

Load

VOUT VIN

Figure 1 PCB layout suggestion

Issue 4 - January 2007

6

© Zetex Semiconductors plc 2007

www.zetex.com

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