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LM2901PW Datasheet(PDF) 11 Page - Texas Instruments |
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LM2901PW Datasheet(HTML) 11 Page - Texas Instruments |
11 / 37 page + LM2901 VLOGIC VSUP Vref Vin + LM2901 Vin- Vin+ Rpullup Rpullup VLOGIC VSUP CL CL LM139, LM239, LM339, LM139A LM239A, LM339A, LM2901, LM2901AV, LM2901V www.ti.com SLCS006T – OCTOBER 1979 – REVISED JUNE 2015 9 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. Validate and test the design implementation to confirm system functionality. 9.1 Application Information Typically, the LMx39 compares either a single signal to a reference or two signals. 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 LMx39 optimal for level shifting to a higher or lower voltage. 9.2 Typical Application Figure 7. Single-ended and Differential Comparator Configurations 9.2.1 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 9.2.2 Detailed Design Procedure When using LMx39 in a general comparator application, determine the following: • Input voltage range • Minimum overdrive voltage • Output and drive current • Response time 9.2.2.1 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 V. This limits the input voltage range to as high as VCC– 2 V and as low as 0 V. Operation outside of this range can yield incorrect comparisons. Copyright © 1979–2015, Texas Instruments Incorporated Submit Documentation Feedback 11 Product Folder Links: LM139 LM239 LM339 LM139A LM239A LM339A LM2901 LM2901AV LM2901V |
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