Linear Technology Corporationintroduces the LTC2965 and LTC2966, 3.5V to 100V, single- and dual-channel voltage monitors that draw only 6µA of quiescent current. Alternative voltage monitoring solutions typically call for a low power comparator, a high input voltage LDO to power the comparator and a high value resistive divider to level translate the monitored rail, all of which increase board space and power consumption, and decrease monitoring accuracy. The LTC2965/LTC2966 avoid the major pitfalls of a discrete solution by integrating all components required to directly interface with high voltage rails in space-efficient 3mm x 3mm packages. Each device includes resistor-programmable threshold inputs to facilitate simple undervoltage, overvoltage or window monitoring of positive or negative rails to within ±1.4% accuracy over temperature.
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In addition to the high-voltage inputs, the LTC2965/LTC2966 include adjustable-polarity UV/OV comparator outputs that can be pulled up to voltages as high as 100V. All high-voltage pins are rated to 140V, withstanding high voltage transients without damage. Integrated high value resistive dividers with selectable ratios offer improved accuracy, power savings and flexibility compared to solutions using external high-value resistors. Threshold programming is achieved using low-value discrete resistors in combination with configuration pins for scaling the comparator thresholds and setting output polarity.
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The LTC2965 and LTC2966 re available today in commercial, industrial and automotive versions, with operating temperature ranges from 0 to 70 degrees C, -40 to 85 degrees C, and -40 to 125 degrees C, respectively. The LTC2965 is offered in an 8-pin 3mm x 3mm DFN or MSOP-16 package and the LTC2966 is offered in a 16-pin 3mm x 3mm QFN or 20-lead SO package. Pricing starts at $2.44 (LTC2966) and $1.98 (LTC2965) each, respectively in 1,000 piece quantities.
source: http://www.powerpulse.net/story.php?storyID=31876
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