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LTC1093CSW датащи(PDF) 14 Page - Linear Technology |
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LTC1093CSW датащи(HTML) 14 Page - Linear Technology |
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14 / 32 page ![]() 14 LTC1091/LTC1092 LTC1093/LTC1094 S APPLICATI I FOR ATIO Start Bit The first “logical one” clocked into the DIN input after CS goes low is the start bit. The start bit initiates the data transfer. The LTC1091/LTC1093/LTC1094 will ignore all leading zeros which precede this logical one. After the start bit is received, the remaining bits of the input word will be clocked in. Further inputs on the DIN pin are then ignored until the next CS cycle. Multiplexer (MUX) Address The bits of the input word following the START bit assign the MUX configuration for the requested conversion. For a given channel selection, the converter will measure the voltage between the two channels indicated by the + and – signs in the selected row of the following tables. In single-ended mode, all input channels are measured with respect to GND on the LTC1091 and COM on the LTC1093/LTC1094. SINGLE-ENDED MUX MODE MUX ADDRESS CHANNEL # GND DIFFERENTIAL MUX MODE SGL/ DIFF 1 1 0 0 ODD/ SIGN 0 1 0 1 0 + + – 1 + – + – – 1091-4 AI08 LTC1091 Channel Selection MUX ADDRESS SELECT DIFFERENTIAL CHANNEL SELECTION SGL/ DIFF 0 0 0 0 0 0 0 0 ODD/ SIGN 0 0 0 0 1 1 1 1 1 0 0 1 1 0 0 1 1 0 0 1 0 1 0 1 0 1 0 + – 1 – + 2 + – 3 – + 4 + – 5 – + 1091-4 AI09 NOT USED NOT USED MUX ADDRESS SELECT SINGLE-ENDED CHANNEL SELECTION SGL/ DIFF 1 1 1 1 1 1 1 1 ODD/ SIGN 0 0 0 0 1 1 1 1 1 0 0 1 1 0 0 1 1 0 0 1 0 1 0 1 0 1 0 + 1 + 2 + 3 + 4 + 5 + COM – – – – – – NOT USED NOT USED LTC1093 Channel Selection MUX ADDRESS SELECT DIFFERENTIAL CHANNEL SELECTION SGL/ DIFF 0 0 0 0 0 0 0 0 ODD/ SIGN 0 0 0 0 1 1 1 1 1 0 0 1 1 0 0 1 1 0 0 1 0 1 0 1 0 1 0 + – 1 – + 2 + – 3 – + 4 + – 5 – + 6 + – 7 – + 1091-4 AI0 MUX ADDRESS SELECT SINGLE-ENDED CHANNEL SELECTION SGL/ DIFF 1 1 1 1 1 1 1 1 1 0 0 1 1 0 0 1 1 0 0 1 0 1 0 1 0 1 0 + 1 + 2 + 3 + 4 + 5 + 6 + 7 + COM – – – – – – – – ODD/ SIGN 0 0 0 0 1 1 1 1 LTC1094 Channel Selection |
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