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ADS8674IDBTR Datasheet(PDF) 10 Page - Texas Instruments |
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ADS8674IDBTR Datasheet(HTML) 10 Page - Texas Instruments |
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10 / 79 page  1 2 14 15 16 17 23 24 25 26 27 28 29 30 SCLK CS D7 #2 D6 #2 D5 #2 D4 #2 D3 #2 D2 #2 SDO tSU_CSCK tDV_CSDO tHT_CKDO tSU_DOCK tDZ_CSDO Sample N Sample N + 1 tACQ tCONV tS Data from sample N tPH_CS 31 32 D13 #2 D12 #2 18 D1 #2 D0 #2 B15 B14 B2 B1 B0 X X X X X X SDI X X X X X X tPH_CK tPL_CK tSCLK tSU_DICK tHT_CKDI tD_CKCS 7 8 9 B9 B8 B7 B10 B3 D7 #1 D6 #1 D5 #1 D4 #1 D3 #1 D2 #1 DAISY D13 #1 D12 #1 D1 #1 D0 #1 tHT_CKDSY tSU_DSYCK ADS8674, ADS8678 SBAS627 – JULY 2015 www.ti.com 7.6 Timing Requirements: Serial Interface Minimum and maximum specifications are at TA = –40°C to 125°C. Typical specifications are at TA = 25°C. AVDD = 5 V, DVDD = 3 V, VREF = 4.096 V (internal), SDO load = 20 pF, and fSAMPLE = 500 kSPS, unless otherwise noted. MIN TYP MAX UNIT TIMING SPECIFICATIONS fS Sampling frequency (fCLK = max) 500 kSPS tS ADC cycle time period (fCLK = max) 2 µs fSCLK Serial clock frequency (fS = max) 17 MHz tSCLK Serial clock time period (fS = max) 59 ns tCONV Conversion time 850 ns tDZ_CSDO Delay time: CS falling to data enable 10 ns tD_CKCS Delay time: last SCLK falling to CS rising 10 ns tDZ_CSDO Delay time: CS rising to SDO going to 3-state 10 ns TIMING REQUIREMENTS tACQ Acquisition time 1150 ns tPH_CK Clock high time 0.4 0.6 tSCLK tPL_CK Clock low time 0.4 0.6 tSCLK tPH_CS CS high time 30 ns tSU_CSCK Setup time: CS falling to SCLK falling 30 ns tHT_CKDO Hold time: SCLK falling to (previous) data valid on SDO 10 ns tSU_DOCK Setup time: SDO data valid to SCLK falling 25 ns tSU_DICK Setup time: SDI data valid to SCLK falling 5 ns tHT_CKDI Hold time: SCLK falling to (previous) data valid on SDI 5 ns tSU_DSYCK Setup time: DAISY data valid to SCLK falling 5 ns tHT_CKDSY Hold time: SCLK falling to (previous) data valid on DAISY 5 ns Figure 1. Serial Interface Timing Diagram 10 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: ADS8674 ADS8678 |
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