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TLC1543IFN 数据表(PDF) 7 Page - Texas Instruments |
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TLC1543IFN 数据表(HTML) 7 Page - Texas Instruments |
7 / 27 page TLC1542C, TLC1542I, TLC1542M, TLC1542Q, TLC1543C, TLC1543I, TLC1543Q 10-BIT ANALOG-TO-DIGITAL CONVERTERS WITH SERIAL CONTROL AND 11 ANALOG INPUTS SLAS052E – MARCH 1992 – OCTOBER 1998 7 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 converter and analog input (continued) With each step of the successive-approximation process, the initial charge is redistributed among the capacitors. The conversion process relies on charge redistribution to count and weigh the bits from MSB to LSB. 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 Figure 1. Simplified Model of the Successive-Approximation System chip-select operation 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. reference voltage inputs 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 –. |
类似零件编号 - TLC1543IFN |
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类似说明 - TLC1543IFN |
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