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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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TC7106CPL датащи(PDF) 15 Page - Microchip Technology |
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TC7106CPL датащи(HTML) 15 Page - Microchip Technology |
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15 / 34 page  © 2008 Microchip Technology Inc. DS21455D-page 15 TC7106/A/TC7107/A In some applications, a scale factor other than unity may exist between a transducer output voltage and the required digital reading. Assume, for example, a pressure transducer output is 400 mV for 2000 lb/in2. Rather than dividing the input voltage by two, the reference voltage should be set to 200 mV. This permits the transducer input to be used directly. The differential reference can also be used when a digital zero reading is required when VIN is not equal to zero. This is common in temperature measuring instrumentation. A compensating offset voltage can be applied between analog common and VIN-. The transducer output is connected between VIN+ and analog common. The internal voltage reference potential available at analog common will normally be used to supply the converter’s reference. This potential is stable whenever the supply potential is greater than approximately 7V. In applications where an externally generated reference voltage is desired, refer to Figure 7-1. FIGURE 7-1: External Reference. TC7106A TC7107A 6.8V Zener I Z V+ V+ V+ 1.2V Ref Common TC7106A TC7107A 6.8 k Ω 20 k Ω V REF + V REF - V REF + V REF - (a) (b) V+ |
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