Product category:
Analogue and Mixed Signal ICs
News Release from: Linear Technology Corp | Subject: LTC2917
Edited by the Electronicstalk Editorial
Team on 02 November 2007
Voltage supervisor covers a range of
thresholds
The LTC2917 voltage supervisor can monitor up to 27 pin-selectable thresholds over a wide 0.5 to 12V input range.
The LTC2917 from Linear Technology is a single voltage supervisor capable of monitoring a wide 0.5 to 12V input range The LTC2917 can monitor 27 unique pin-selectable thresholds, ranging from a 1V drained single AA battery up to 12V industrial applications
This article was originally published on Electronicstalk on 28 Jul 2004 at 8.00am (UK)
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Competing solutions require separate supervisors for each of these different voltage thresholds.
The LTC2917 supply also includes a 6.2V shunt regulator for monitoring input voltages greater than 12V.
The 27 selectable thresholds are specified with an overall accuracy of +/-1.5% without the need of costly 0.1% external resistors to maintain accuracy.
The LTC2917 includes a watchdog input that checks whether the processor has locked up, with the option of monitoring a maximum time or a windowed time.
The watchdog timer can be set to a fixed 3.2ms or 1.6s, or is adjustable based on an external capacitor, allowing the system software time to initialise.
Offered in the tiny MSOP-10 and 3 x 2mm DFN-10 packages, with guaranteed specifications across the -40 to +125C temperature range, the LTC2917 is ideal for automotive monitoring, portable devices, and general purpose voltage monitoring.
The LTC2917 includes two three-state input pins that select one of nine internally programmed thresholds: 12, 5, 3.3, 2.5, 1.8, 1.5, 1.2, 1.0 or an adjustable 0.5V.
A third three-state input determines if the input threshold is -5, -10 or -15% below the selected voltage level, allowing for margining.
The LTC2918 is a variation on the LTC2917 that offers the same nine input thresholds, but with a fixed -5% tolerance.
The LTC2918 also includes a separate manual reset input for a simple pushbutton interface.
Both the LTC2917 and LTC2918 operate from a single 1.5 to 5.5V supply while consuming only 30uA of quiescent current.
The LTC2917 and LTC2918 are available today in commercial, industrial, and automotive temperature grades, with pricing beginning at US $1.30 each, in 1000-piece quantities. Request a free brochure from Linear Technology Corp ...
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