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ADS1158IRTCRG4 Arkusz danych(PDF) 7 Page - Texas Instruments |
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ADS1158IRTCRG4 Arkusz danych(HTML) 7 Page - Texas Instruments |
7 / 50 page PARAMETER MEASUREMENT INFORMATION 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 DRDY DOUT t DRDY t DDO ADS1158 www.ti.com ............................................................................................................................................................. SBAS429A – JUNE 2008 – REVISED JUNE 2008 (1) CS can be tied low. Figure 1. Serial Interface Timing SERIAL INTERFACE TIMING CHARACTERISTICS At TA= –40°C to +105°C and DVDD = 2.7V to 5.25V, unless otherwise noted. SYMBOL DESCRIPTION MIN MAX UNITS tSCLK SCLK period 2 τ CLK (1) tSPW SCLK high or low pulse width (exceeding max resets SPI interface) 0.8 4096(2) τ CLK tCSSC CS low to first SCLK: setup time(3) 2.5 τ CLK 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(4) 20 ns tDOHD SCLK falling edge to old DOUT invalid: hold time 0 ns tCSDO CS high to DOUT invalid (3-state) 5 τ CLK tCSPW CS pulse width high 2 τ CLK (1) τ CLK = master clock period = 1/fCLK. (2) Programmable to 256 τ CLK. (3) CS can be tied low. (4) DOUT load = 20pF || 100k Ω to DGND. Figure 2. DRDY Update Timing DRDY UPDATE TIMING CHARACTERISTICS SYMBOL DESCRIPTION TYP UNITS tDRDY DRDY high pulse width without data read 1 τ CLK tDDO Valid DOUT to DRDY falling edge (CS = 0) 0.5 τ CLK Copyright © 2008, Texas Instruments Incorporated Submit Documentation Feedback 7 Product Folder Link(s): ADS1158 |
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