ZXCT1011 View Datasheet(PDF) - Diodes Incorporated.

Part Name

Description

Manufacturer

ZXCT1011

High-side low drift current monitor

Diodes Incorporated. 

ZXCT1011

Application information (cont.)

Minimum operating voltage

The minimum operating voltage of the ZXCT1011 is 2.5V and is defined as the difference between

Vsense+ and the Iout pin. It must be ensured that sufficient headroom is given for the operation of

the device when considering Rout.

Vin = 10V

R sense

To load

Rshunt

120R

5

4

V sense+ V sense-

3

ZXCT

Rshunt 1011

I out

R

2

Vout

3.3K

Figure 2 Considerations for supply rail

Voltage across device 2.5V

Vin - Vout 2.5V

Where Vout = Iout x Rout

At low supply voltages and high Vsense measurements, special care must be taken to ensure the

correct operation.

The circuit in figure 2.0 shows a ZXCT1011 operating from 10V supply rail. The minimum

operating voltage of the ZXCT1011 is 2.5V. This allows a maximum output voltage of 7.5V to be

set at Vout. A 3k resistor on the output would draw a maximum 2.5mA from Iout. - See minimum

usable supply voltage graph on page 4.

Issue 1- July 2005

7

© Zetex Semiconductors plc 2005

www.zetex.com

Share Link: