The LM139 series consists of four independent precisionvoltage comparators with an offset voltage specification aslow as 2 mV max for all four comparators. These weredesigned specifically to operate from a single power supplyover a wide range of voltages. Operation from split powersupplies is also possible and the low power supply currentdrain is independent of the magnitude of the power supplyvoltage. These comparators also have a unique characteristicin that the input common-mode voltage range includesground, even though operated from a single power supplyvoltage.
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