Product category:
Analogue and Mixed Signal ICs
News Release from: Zetex | Subject: ZXCT1008
Edited by the Electronicstalk Editorial
Team on 13 October 2004
Current monitor aims for automotive
applications
The ZXCT1008 high-accuracy current monitor features a -40 to +125C ambient temperature rating for automotive load measurement and control.
The ZXCT1008 high-accuracy current monitor features a -40 to +125C ambient temperature rating for automotive load measurement and control The application simplicity of the three-terminal device enables it to tolerate high voltage transients, overvoltage and reverse polarity events
This article was originally published on Electronicstalk on 6 Feb 2002 at 8.00am (UK)
Related stories
MOSFETs to give that home theatre sound
Zetex has launched a series of four N- and P-channel MOSFETs providing all the performance demanded by Class D audio systems.
Chip takes control of brushless fans and blowers
The ZXBM2000 series of controller ICs offers a complete variable speed control solution for two-phase, DC brushless fan and blower motors up to 100W.
A high-side current monitoring device, the SOT23 packaged ZXCT1008 eliminates any ground plane disruption when sensing a load current.
It takes a sense voltage across a low value shunt resistor and converts it into a 1% accurate proportional output voltage, scaled by a user defined output resistor.
The lack of a separate ground connection means the ZXCT1008 can be "floated" and input voltages accommodated well above the device's normal 2.5 to 20V limit.
Simply adding a Zener in series with the ground reference resistor offsets the input voltage range.
Putting a Zener across the IC's voltage input and current output terminals also protects it against overvoltage and reverse-polarity events, in both instances, the Zener conducts to maintain safe operating conditions for the current monitor.
The ZXCT1008's maximum sense voltage is 500mV and its operating bandwidth of 2MHz is sufficient to ensure load current measurements are provided in real time.
The device's low typical quiescent current of 4uA ensures drain on battery power is kept to an absolute minimum.
The price of the ZXCT1008 through distributors is $0.55 in quantities of 1000.
• Zetex: contact details and other news
• Email this article to a colleague
• Register for the free Electronicstalk email newsletter
• Electronicstalk Home Page
Search the Pro-Talk network of sites
