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ADS1258-EP Arkusz danych(PDF) 7 Page - Texas Instruments |
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ADS1258-EP Arkusz danych(HTML) 7 Page - Texas Instruments |
7 / 59 page SCLK CS (1) DIN DOUT t SCLK t CSSC t SPW t DIST t DIHD t SPW t CSDO Hi-Z Hi-Z t CSPW t DOPD t DOHD NOTE:(1) canbetiedlow. CS DRDY DOUT t DRDY t DDO ADS1258-EP www.ti.com SBAS445D – MARCH 2009 – REVISED MARCH 2011 PARAMETER MEASUREMENT INFORMATION Figure 1. Serial Interface Timing SERIAL INTERFACE TIMING CHARACTERISTICS At TA= –40°C to +105°C (1) and DVDD = 2.7 V to 5.25 V, unless otherwise noted. SYMBOL DESCRIPTION MIN MAX UNITS tSCLK SCLK Period 2 τCLK (2) tSPW SCLK High or Low Pulse Width (exceeding max resets SPI interface) 0.8 4096(3) τCLK tCSSC CS Low to First SCLK: Setup Time(4) 2.5 τCLK tDIST Valid DIN to SCLK Rising Edge: Setup Time 10 ns tDIHD Valid DIN to SCLK Rising Edge: Hold Time 5 ns tDOPD SCLK Falling Edge to Valid New DOUT: Propagation Delay(5) 20 ns tDOHD SCLK Falling Edge to Old DOUT Invalid: Hold Time 0 ns tCSDO CS High to DOUT Invalid (tri-state) 5 τCLK tCSPW CS Pulse Width High 2 τCLK (1) Ensured by characterization only. (2) τCLK = master clock period = 1/fCLK. (3) Programmable to 256 τCLK. (4) CS can be tied low. (5) DOUT load = 20 pF || 100k Ω to DGND. Figure 2. DRDY Update Timing DRDY UPDATE TIMING CHARACTERISTICS SYMBOL DESCRIPTION TYP UNITS t DRDY DRDY High Pulse Width Without Data Read 1 τCLK tDDO Valid DOUT to DRDY Falling Edge (CS = 0) 0.5 τCLK Copyright © 2009–2011, Texas Instruments Incorporated Submit Documentation Feedback 7 Product Folder Link(s): ADS1258-EP |
Podobny numer części - ADS1258-EP_14 |
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Podobny opis - ADS1258-EP_14 |
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