ZXCT1080E5TA View Datasheet(PDF) - Diodes Incorporated.

Part Name

Description

Manufacturer

ZXCT1080E5TA

HIGH VOLTAGE HIGH-SIDE CURRENT MONITOR

Diodes Incorporated. 

ZXCT1080

HIGH VOLTAGE HIGH-SIDE CURRENT MONITOR

Application Information

The ZXCT1080 has been designed to allow it to operate with 5V supply rails while sensing common mode signals up to 60V.

This makes it well suited to a wide range of industrial and power supply monitoring applications that require the interface to

5V systems while sensing much higher voltages.

To allow this its VCC pin can be used independently of S+.

Figure 1 shows the basic configuration of the ZXCT1080.

Fig. 20 Typical Configuration of ZXCT1080

Load current from the input is drawn through RSENSE developing a voltage VSENSE across the inputs of the ZXCT1080.

The internal amplifier forces VSENSE across internal resistance RGT causing a current to flow through MOSFET M1. This

current is then converted to a voltage by RG. A ratio of 10:1 between RG and RGT creates the fixed gain of 10. The output is

then buffered by the unity gain buffer.

The gain equation of the ZXCT1080 is:

VOUT

=

IL RSENSE

RG

RGT

×1=

IL

x RSENSE

× 10

The maximum recommended differential input voltage, VSENSE, is 150mV; it will however withstand voltages up to 800mV.

This can be increased further by the inclusion of a resistor, RLIM, between S- pin and the load; typical value is of the order of

10k.

ZXCT1080

Document number: DS33454 Rev. 4 - 2

8 of 11

www.diodes.com

December 2011

© Diodes Incorporated

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