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LTC2314-14 Datasheet(PDF) 11 Page - Linear Technology |
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LTC2314-14 Datasheet(HTML) 11 Page - Linear Technology |
11 / 20 page LTC2314-14 11 231414f For more information www.linear.com/2314-14 tTHROUGHPUT tACQ-MIN tACQ-MIN = 40ns tCONV tCONV(MIN) = 15 • tSCK + t2 + t10 16 15 5 4 3 2 1 CS SCK SDO HI-Z STATE (MSB) *NOTE: SDO REPRESENTS THE ANALOG INPUT FROM THE PREVIOUS CONVERSION B0 0 B1 B11 B12 B13* 0 0 231414 TD06 t5 t6 t2 t4 t7 t10 t9 t3 Figure 6: LTC2314-14 Serial Interface Timing Diagram (SCK High During tACQ) tTHROUGHPUT = 20 • tSCK tACQ tACQ = 4 • tSCK tCONV tCONV = 16 • tSCK 15 16 17 18 19 20 20 4 5 3 2 1 CS SCK SDO HI-Z STATE (MSB) *NOTE: SDO REPRESENTS THE ANALOG INPUT FROM THE PREVIOUS CONVERSION B1 B0 0 B11 B12 B13* 0 0 231414 TD07 t5 t6 t2 t4 t7 t10 t9 t3 Figure 7: LTC2314-14 Serial Interface Timing Diagram (SCK Continuous) applicaTions inForMaTion tTHROUGHPUT tACQ-MIN tACQ-MIN = 40ns tCONV tCONV = 15.5 • tSCK + t2 + t10 16 15 14 4 3 2 1 CS SCK SDO HI-Z STATE (MSB) *NOTE: SDO REPRESENTS THE ANALOG INPUT FROM THE PREVIOUS CONVERSION B0 0 B11 B12 B13* 0 231414 F05 t5 t6 t2 t4 t7 t9 t3 t10 Figure 5: LTC2314-14 Serial Interface Timing Diagram (SCK Low During tACQ) Serial Data Output (SDO) The SDO output is always forced into the high impedance state while CS is high. The falling edge of CS starts the conversion and enables SDO. The A/D conversion result is shifted out on the SDO pin as a serial data stream with the MSB first. The data stream consists of either one leading zero (SCK held low during acquisition, Fig. 5) or two leading zeros (SCK held high during acquisition, Fig. 6) followed by 14 bits of conversion data. There is 1 cycle of conversion latency. Subsequent falling SCK edges after the LSB is output will output zeros on the SDO pin. The SDO output returns to the high impedance state after the 16th falling edge of SCK. |
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