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LM193 데이터시트(PDF) 10 Page - Texas Instruments |
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LM193 데이터시트(HTML) 10 Page - Texas Instruments |
10 / 25 page + ½ LM2903 VLOGIC VSUP Vref Vin + ½ LM2903 Vin- Vin+ Rpullup Rpullup VLOGIC VSUP CL CL LM193, LM293, LM293A, LM393, LM393A, LM2903, LM2903V SLCS005Y – OCTOBER 1979 – REVISED JUNE 2015 www.ti.com 8 Application and Implementation NOTE Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality. 8.1 Application Information LM2903 will typically be used to compare a single signal to a reference or two signals against each other. Many users take advantage of the open drain output to drive the comparison logic output to a logic voltage level to an MCU or logic device. The wide supply range and high voltage capability makes LM2903 optimal for level shifting to a higher or lower voltage. 8.2 Typical Application Figure 7. Single-Ended and Differential Comparator Configurations 8.2.1 Design Requirements For this design example, use the parameters listed in Table 1 as the input parameters. Table 1. Design Parameters DESIGN PARAMETER EXAMPLE VALUE Input Voltage Range 0 V to Vsup-1.5 V Supply Voltage 2 V to 36 V Logic Supply Voltage 2 V to 36 V Output Current (RPULLUP) 1 µA to 20 mA Input Overdrive Voltage 100 mV Reference Voltage 2.5 V Load Capacitance (CL) 15 pF 8.2.2 Detailed Design Procedure When using LM2903 in a general comparator application, determine the following: • Input Voltage Range • Minimum Overdrive Voltage • Output and Drive Current • Response Time 8.2.2.1 Input Voltage Range When choosing the input voltage range, the input common mode voltage range (VICR) must be taken in to account. If temperature operation is above or below 25°C the VICR can range from 0 V to VCC– 2.0 V. This limits the input voltage range to as high as VCC– 2.0 V and as low as 0 V. Operation outside of this range can yield incorrect comparisons. Below is a list of input voltage situation and their outcomes: 10 Submit Documentation Feedback Copyright © 1979–2015, Texas Instruments Incorporated Product Folder Links: LM193 LM293 LM293A LM393 LM393A LM2903 LM2903V |
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