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LTC1291DC Datasheet(PDF) 8 Page - Linear Technology |
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LTC1291DC Datasheet(HTML) 8 Page - Linear Technology |
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8 / 20 page  8 LTC1291 S APPLICATI I FOR ATIO DATA (DIN/DOUT). Data transfer is initiated by a falling chip select (CS) signal. After CS falls the LTC1291 looks for a start bit. After the start bit is received a 4-bit input word is shifted into the DIN input which configures the LTC1291 and starts the conversion. After one null bit, the result of the conversion appears MSB-first on the DOUT line. The conversion result is output, bit by bit, as the conversion is performed. At the end of the data exchange CS should be brought high. This resets the LTC1291 in preparation for the next data exchange. Operating Sequence (Example: Differential Inputs (CH0+, CH1–)) MSB-FIRST DATA (MSBF = 1) tCYC CS START MSBF tSMPL HI-Z FILLED WITH ZEROES B0 B1 DIN PS SGL/ DIFF ODD/ SIGN DOUT tCONV HI-Z B11 tCONV B1 B0 B1 B11 FILLED WITH ZEROES CLK DON'T CARE LSB-FIRST DATA (MSBF = 0) tCYC DON’T CARE DON'T CARE CS DIN DOUT CLK START PS MSBF ODD/ SIGN tSMPL SGL/ DIFF DON'T CARE 1291 AI03 B11 CS START MSBF HI-Z FILLED WITH ZEROES DIN PS SGL/ DIFF ODD/ SIGN DOUT B11 B0 CLK DON'T CARE 1291 AI04 SHUTDOWN* NEW CONVERSION BEGINS START MSBF PS SGL/ DIFF ODD/ SIGN HI-Z DATA NOT VALID REQUEST POWER SHUTDOWN * STOPPING THE CLOCK WILL HELP REDUCE POWER CONSUMPTION CS CAN BE BROUGHT HIGH ONCE DIN HAS BEEN CLOCKED IN Power Shutdown Operating Sequence (Example: Differential Inputs (CH0+, CH1–) and MSB-First Data) |
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Similar Description - LTC1291DC |
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