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ADS1259 Datasheet(PDF) 6 Page - Texas Instruments |
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ADS1259 Datasheet(HTML) 6 Page - Texas Instruments |
6 / 45 page SCLK CS DIN DOUT t SCLK t CSSC t DIHD t CSH t CSDOD t DIST t SPWH t SPWL t CSDOZ t DOHD t DOPD B7 B6 B5 B4 B3 B2 B1 B0 B7 B6 B5 B4 B3 B2 B1 B0 ADS1259 SBAS424C – JUNE 2009 – REVISED MARCH 2010 www.ti.com SPI TIMING CHARACTERISTICS Figure 1. Serial Interface Timing TIMING REQUIREMENTS: SERIAL INTERFACE TIMING At TA = –40°C to +105°C and DVDD = 2.7V to 5.25V, unless otherwise noted. SYMBOL DESCRIPTION MIN MAX UNIT tCSSC CS low to first SCLK: setup time(1) 50 ns tSCLK SCLK period 1.8 tCLK (2) tSPWH SCLK pulse width: high 90 ns 90 ns tSPWL SCLK pulse width: low(3) 216 tCLK tDIST Valid DIN to SCLK falling edge: setup time 35 ns tDIHD Valid DIN to SCLK falling edge: hold time 20 ns tDOPD SCLK rising edge to valid new DOUT: propagation delay(4) 60 ns tDOHD SCLK rising edge to DOUT invalid: hold time 0 ns tCSDOD CS low to DOUT driven: propagation delay(4) 0 40 ns tCSDOZ CS high to DOUT Hi-Z: propagation delay 20 ns tCSH CS high pulse 20 tCLK (1) CS can be tied low. (2) tCLK = 1/fCLK. (3) Holding SCLK low longer than 216 × tCLK cycles resets the SPI interface (enabled by SPI register bit). (4) DOUT load = 20pF || 100k Ω to DGND. 6 Submit Documentation Feedback Copyright © 2009–2010, Texas Instruments Incorporated Product Folder Link(s): ADS1259 |
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