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TLC1543I 데이터시트(PDF) 7 Page - Texas Instruments |
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TLC1543I 데이터시트(HTML) 7 Page - Texas Instruments |
7 / 34 page www.ti.com SC Threshold Detector Node 512 REF − REF+ ST 512 VI To Output Latches REF+ REF+ REF+ REF+ 1 2 4 8 16 128 256 1 REF+ REF+ REF − REF − REF − REF − REF − REF − REF − REF − ST ST ST ST ST ST ST ST CHIP-SELECT OPERATION REFERENCE VOLTAGE INPUTS TLC1542I,, TLC1542M,, TLC1542Q TLC1542C, TLC1543C, TLC1543I, TLC1543Q SLAS052G – MARCH 1992 – REVISED JANUARY 2006 Figure 1. Simplified Model of the Successive-Approximation System The trailing edge of CS starts all modes of operation, and CS can abort a conversion sequence in any mode. A high-to-low transition on CS within the specified time during an ongoing cycle aborts the cycle, and the device returns to the initial state (the contents of the output data register remain at the previous conversion result). Exercise care to prevent CS from being taken low close to completion of conversion because the output data can be corrupted. There are two reference inputs used with the device: REF+ and REF-. These voltage values establish the upper and lower limits of the analog input to produce a full-scale and zero reading respectively. The values of REF+, REF-, and the analog input should not exceed the positive supply or be lower than GND consistent with the specified absolute maximum ratings. The digital output is at full scale when the input signal is equal to or higher than REF+ and at zero when the input signal is equal to or lower than REF-. 7 Submit Documentation Feedback |
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