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LTC2486IDE датащи(PDF) 21 Page - Linear Technology |
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LTC2486IDE датащи(HTML) 21 Page - Linear Technology |
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21 / 36 page ![]() LTC2486 21 2486f APPLICATIONS INFORMATION Figure 4. Internal PTAT Digital Output vs Temperature Figure 5. Absolute Temperature Error Table 6. Serial Interface Timing Modes CONFIGURATION SCK SOURCE CONVERSION CYCLE CONTROL DATA OUTPUT CONTROL CONNECTION AND WAVEFORMS External SCK, Single Cycle Conversion External ⎯C⎯S and SCK ⎯C⎯S and SCK Figures 6, 7 External SCK, 3-Wire I/O External SCK SCK Figure 8 Internal SCK, Single Cycle Conversion Internal ⎯C⎯S↓ ⎯C⎯S↓ Figures 9, 10 Internal SCK, 3-Wire I/O, Continuous Conversion Internal Continuous Internal Figure 11 TEMPERATURE (K) 0 60000 80000 100000 120000 140000 400 2486 F04 40000 0 300 200 100 20000 VCC = 5V VREF = 5V SLOPE = 314 LSB16/K TEMPERATURE ( °C) –55 –30 –5 5 4 3 2 1 –4 –3 –2 –1 0 120 95 70 45 20 2486 F05 –5 Figure 6. External Serial Clock, Single Cycle Operation Hi-Z 2486 F06 CS SCK (EXTERNAL) SDI SDO CONVERSION SLEEP DATA INPUT/OUTPUT CONVERSION VCC FO REF+ REF– CH0 CH1 CH2 CH3 COM SCK SDI CS SDO GND 12 1 13 14 8 9 10 11 7 3 4 6 5 2 REFERENCE VOLTAGE 0.1V TO VCC ANALOG INPUTS = EXTERNAL OSCILLATOR = INTERNAL OSCILLATOR LTC2486 2.7V TO 5.5V 0.1 µF 10 µF 4-WIRE SPI INTERFACE EOC BIT 20 BIT 19 BIT 18 BIT 17 BIT 16 BIT 15 BIT 14 BIT 13 BIT 12 BIT 11 BIT 21 BIT 22 BIT 23 BIT 10 BIT 9 BIT 0 12 3 4 5 6 7 8 9 10 11 12 13 14 15 16 24 1 0 EN SGL A2 A1 A0 EN2 IM FA FB SPD GS2 GS1 GS0 ODD DON'T CARE DON'T CARE MSB SIG “0” |
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