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ADS1118IDGST Datasheet(PDF) 6 Page - Texas Instruments |
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ADS1118IDGST Datasheet(HTML) 6 Page - Texas Instruments |
6 / 34 page SCLK CS DIN DOUT t SCLK t CSSC t SPWH t DIHD t SPWL t CSDOZ t DOHD t DOPD t SCCS t SCSC t CSH t CSDOD t DIST Hi-Z Hi-Z ADS1118 SBAS457A – OCTOBER 2010 – REVISED JULY 2011 www.ti.com SPI TIMING CHARACTERISTICS Figure 1. Serial Interface Timing TIMING REQUIREMENTS: SERIAL INTERFACE TIMING At TA = –40°C to +125°C and VDD = 2V to 5.5V, unless otherwise noted. SYMBOL DESCRIPTION MIN MAX UNIT tCSSC CS low to first SCLK: setup time(1) 100 ns tSCLK SCLK period 250 ns tSPWH SCLK pulse width: high 100 ns 100 ns tSPWL SCLK pulse width: low(2) 28 ms tDIST Valid DIN to SCLK falling edge: setup time 50 ns tDIHD Valid DIN to SCLK falling edge: hold time 50 ns tDOPD SCLK rising edge to valid new DOUT: propagation delay(3) 50 ns tDOHD SCLK rising edge to DOUT invalid: hold time 0 ns tCSDOD CS low to DOUT driven: propagation delay 100 ns tCSDOZ CS high to DOUT Hi-Z: propagation delay 100 ns tCSH CS high pulse 200 ns tSCCS Final SCLK falling edge to CS high 100 ns (1) CS can be tied low. (2) Holding SCLK low longer than 28ms resets the SPI interface. (3) DOUT load = 20pF || 100k Ω to DGND. 6 Copyright © 2010–2011, Texas Instruments Incorporated |
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