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LM2903ITL Datasheet(PDF) 10 Page - Texas Instruments |
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LM2903ITL Datasheet(HTML) 10 Page - Texas Instruments |
10 / 29 page LM193-N, LM2903-N, LM293-N, LM393-N SNOSBJ6F – OCTOBER 1999 – REVISED DECEMBER 2014 www.ti.com 8 Detailed Description 8.1 Overview The LM139 provides two independently functioning, high-precision, low VOS drift, low input bias current comparators in a single package. The low power consumption of 0.4mA at 5V and the 2.0V supply operation makes the LM139 suitable for battery powered applications. 8.2 Functional Block Diagram Figure 11. Basic Comparator 8.3 Feature Description The input bias current of 25 nA enables the LM193 to use even very high impedance nodes as inputs. The differential voltage input range equals the supply voltage range. The LM193 can be operated with a single supply, where V+ can be from 2.0 V to 36 V, or in a dual supply voltage configuration, where GND pin is used as a V– supply. The supply current draws only 0.4 mA for both comparators. The output of each comparator in the LM193 is the open collector of a grounded-emitter NPN output transistor which can typically draw up to 16mA. 8.4 Device Functional Modes A basic comparator circuit is used for converting analog signals to a digital output. The output is HIGH when the voltage on the non-inverting (+IN) input is greater than the inverting (-IN) input. The output is LOW when the voltage on the non-inverting (+IN) input is less than the inverting (-IN) input. The inverting input (-IN) is also commonly referred to as the "reference" or "VREF" input. All pins of any unused comparators should be tied to the negative supply. 10 Submit Documentation Feedback Copyright © 1999–2014, Texas Instruments Incorporated Product Folder Links: LM193-N LM2903-N LM293-N LM393-N |
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