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Zakładka z wyszukiwarką danych komponentów |
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Zakładka z wyszukiwarką danych komponentów |
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TSC2003 Arkusz danych(PDF) 11 Page - Texas Instruments |
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TSC2003 Arkusz danych(HTML) 11 Page - Texas Instruments |
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11 / 28 page  TSC2003 11 SBAS162G www.ti.com INTERNAL REFERENCE The TSC2003 has an internal 2.5V voltage reference that can be turned ON or OFF with the power-down control bits, PD0 and PD1 (see Table II and Figure 3). The internal reference is powered down when power is first applied to the device. The internal reference voltage is only used in the single-ended reference mode for battery monitoring, tem- perature measurement, and for measuring the auxiliary in- put. Optimal touch screen performance is achieved when using a ratiometric conversion; thus, all touch screen mea- surements are done automatically in the differential mode. Buffer Band Gap Reference Power Down To CDAC Optional V REF FIGURE 3. Simplified Diagram of the Internal Reference. FIGURE 2. Simplified Diagram of the Analog Input. Converter –REF +REF +IN –IN V BAT1 IN1 Battery On IN2 GND C2-C0 (Shown 101 B) 2.5V Reference Ref ON/OFF C3 (Shown HIGH) X+ X– +V DD TEMP1 PENIRQ Y+ Y– V REF TEMP0 7.5k Ω V BAT2 7.5k Ω 2.5k Ω Battery On 2.5k Ω |
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Podobny opis - TSC2003 |
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