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LM393B データシート(PDF) 19 Page - Texas Instruments |
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LM393B データシート(HTML) 19 Page - Texas Instruments |
19 / 49 page + ½ LM2903 VLOGIC VSUP Vref Vin + ½ LM2903 Vin- Vin+ Rpullup Rpullup VLOGIC VSUP C L C L 19 LM393B, LM2903B, LM193, LM293, LM293A, LM393, LM393A, LM2903, LM2903V www.ti.com SLCS005AC – OCTOBER 1979 – REVISED FEBRUARY 2020 Product Folder Links: LM393B LM2903B LM193 LM293 LM293A LM393 LM393A LM2903 LM2903V Submit Documentation Feedback Copyright © 1979–2020, Texas Instruments Incorporated 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 The device is typically 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 this comaprator optimal for level shifting to a higher or lower voltage. 8.2 Typical Application Figure 39. 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-2 V Supply Voltage 4.5 V to VCC maximum Logic Supply Voltage 0 V to VCC maximum Output Current (RPULLUP) 1 µA to 4 mA Input Overdrive Voltage 100 mV Reference Voltage 2.5 V Load Capacitance (CL) 15 pF 8.2.2 Detailed Design Procedure When using the device 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 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. |
同様の部品番号 - LM393B |
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同様の説明 - LM393B |
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