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ADS1246 Arkusz danych(PDF) 10 Page - Texas Instruments |
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ADS1246 Arkusz danych(HTML) 10 Page - Texas Instruments |
10 / 71 page SCLK DOUT[7] DOUT[6] DOUT[5] DOUT[4] DOUT[1] DOUT[0] DIN[0] DIN[7] DIN[6] DIN[5] DIN[4] DIN[1] DIN[0] CS DOUT/ (1) DRDY DIN t CSSC t DIST t DIHD t SCLK t SCCS t CSDO t DOPD t SPWL t SPWH t DOHD t CSPW SCLK (3) 1 2 3 8 7 6 5 4 DRDY t STD t DTS t PWH ADS1246 ADS1247 ADS1248 SBAS426G – AUGUST 2008 – REVISED OCTOBER 2011 www.ti.com TIMING DIAGRAMS Figure 1. Serial Interface Timing Timing Characteristics for Figure 1 (1) At TA = -40°C to +105°C and DVDD = 2.7V to 5.5V. SYMBOL DESCRIPTION MIN MAX UNIT tCSSC CS low to first SCLK high (set up time) 10 ns tSCCS SCLK low to CS high (hold time) 7 tOSC (2) tDIST DIN set up time 5 ns tDIHD DIN hold time 5 ns tDOPD SCLK rising edge to new data valid 50(3) ns tDOHD DOUT hold time 0 ns 488 ns tSCLK SCLK period 64 Conversions tSPWH SCLK pulse width high 0.25 0.75 tSCLK tSPWL SCLK pulse width low 0.25 0.75 tSCLK tCSDO CS high to DOUT high impedance 10 ns tCSPW Chip Select high pulse width 5 tOSC (1) DRDY MODE bit = 0. (2) tOSC = 1/fCLK. The default clock frequency fCLK = 4.096MHz. (3) For DVDD > 3.6V, tDOPD = 180ns. (1) This timing diagram is applicable only when the CS pin is low. SCLK need not be low during tSTD when CS is high. (2) SCLK should only be sent in multiples of eight during partial retrieval of output data. Figure 2. SPI Interface Timing to Allow Conversion Result Loading Timing Characteristics for Figure 2 At TA = -40°C to +105°C and DVDD = 2.7V to 5.5V. SYMBOL DESCRIPTION MIN MAX UNIT tPWH DRDY pulse width high 3 tOSC tSTD SCLK low prior to DRDY low 5 tOSC tDTS DRDY falling edge to SCLK rising edge 1/fCLK ns 10 Submit Documentation Feedback Copyright © 2008–2011, Texas Instruments Incorporated Product Folder Link(s): ADS1246 ADS1247 ADS1248 |
Podobny numer części - ADS1246_14 |
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Podobny opis - ADS1246_14 |
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