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AD676 データシート(PDF) 4 Page - Analog Devices |
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AD676 データシート(HTML) 4 Page - Analog Devices |
4 / 16 page AD676 REV. A –4– TIMING SPECIFICATIONS Parameter Symbol Min Typ Max Units Conversion Time 2 tC 10 1000 µs CLK Period 3 tCLK 480 ns Calibration Time tCT 85,530 tCLK Sampling Time (Included in tC)tS 2 µs CAL to BUSY Delay tCALB 75 150 ns BUSY to SAMPLE Delay tBS 2 µs SAMPLE to BUSY Delay tSB 15 100 ns CLK HIGH 4 tCH 50 ns CLK LOW 4 tCL 50 ns SAMPLE LOW to 1st CLK Delay tSC 50 ns SAMPLE LOW tSL 100 ns Output Delay tOD 125 200 ns Status Delay tSD 50 ns CAL HIGH Time tCALH 50 ns NOTES 1See the “CONVERSION CONTROL” and “AUTOCALIBRATION” sections for detailed explanations of the above timing. 2Depends upon external clock frequency; includes acquisition time and conversion time. The maximum conversion time is specified to account for the droop of the internal sample/hold function. Longer conversion times may degrade performance. See “General Conversion Guidelines” for additional explanation of maximum con- version time. 3580 ns is recommended for optimal accuracy over temperature. 4t CH + tCL = tCLK and must be greater than 480 ns. CAL BUSY CLK t CH t CL t CLK tCALB t OD t CT CALH t Figure 1. Calibration Timing SAMPLE (INPUT) CLK (INPUT) BIT 1 – BIT 16 (OUTPUTS) BUSY (OUTPUT) 1 234 5 t S t SL t SC t CLK t CL t CH t OD t SD t SB t BS t C 13 14 15 16 17 (PREVIOUS CONVERSION) (NEW DATA) Figure 2a. General Conversion Timing SAMPLE (INPUT) CLK (INPUT) BIT 1 – BIT 16 (OUTPUTS) BUSY (OUTPUT) 1 234 5 t S t SL t SC t CLK t CL t CH t OD t SD t SB t BS t C 13 14 15 16 17 t S (PREVIOUS CONVERSION) (NEW DATA) Figure 2b. Continuous Conversion Timing (TMIN to TMAX VCC = +12 V 5%, VEE = –12 V 5%, VDD = +5 V 10%, VREF = 10.0 V) 1 |
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同様の説明 - AD676 |
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