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REF3318 Datasheet(PDF) 11 Page - Texas Instruments |
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REF3318 Datasheet(HTML) 11 Page - Texas Instruments |
11 / 24 page +V +5 V CC R 100 k LOAD W V O R3 1 MW R2 1 MW R1 1 MW V IN V A 5 V 0 V 1.67 V 3.33 V V A2 V A1 V IN V O High +V CC V O Low +V CC V A1 R1 R2 R3 V A2 R1 R2 R3 D - V = V V A A1 A2 V = V A2 CC ´ R2 || R3 R1 + (R2 || R3) V = V A1 CC ´ R2 (R1 || R3) + R2 TLV3691 www.ti.com SBOS694 – DECEMBER 2013 Inverting Comparator With Hysteresis The inverting comparator with hysteresis requires a three-resistor network that is referenced to the comparator supply voltage (VCC), as shown in Figure 29. When VIN at the inverting input is less than VA, the output voltage is high (for simplicity, assume VO switches as high as VCC). The three network resistors can be represented as R1 || R3 in series with R2. The high to low trip voltage (VA1) is defined by Equation 1: (1) When VIN is greater than VA, the output voltage is low, very close to ground. In this case, the three network resistors can be presented as R2 || R3 in series with R1. The low to high trip voltage (VA2) is defined by Equation 2: (2) The total hysteresis provided by the network is defined by Equation 3: (3) Figure 29. TLV3691 in an Inverting Configuration with Hysteresis Copyright © 2013, Texas Instruments Incorporated Submit Documentation Feedback 11 Product Folder Links: TLV3691 |
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