Micropower comparators

27 August 2003 Analogue, Mixed Signal, LSI

Linear Technology has released new dual micropower comparators with integrated ultralow 400 mV reference. Available in 6-lead ThinSOT they are suited for monitoring supply voltages in portable devices. Powerful 40 mA can drive LEDs, opto-isolators and relays directly. Operating over a wide 1,4 to 18 V supply range, the devices draw only 6,5 µA - ideal for battery-powered system monitoring, threshold detectors and window comparators. Built-in comparator hysteresis and guaranteed +2% threshold accuracy ensure stable operation over temperature and in noisy environments. The LT6700 provides two external comparator inputs with the other two inputs connected internally to the on-chip reference. These high impedance inputs boast less than 10 nA input bias current. Three versions of the part simplify system design: the LT6700-1 has one inverting input and one noninverting input, which make it ideal as a window comparator. The LT6700-2 has two inverting inputs and the LT6700-3 has two noninverting inputs, making both devices excellent choices as a 'fuel gauge' or where two different trip points are required.

Memec SA, 011 897 8600

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