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DAC7744EC/1K Datasheet(PDF) 22 Page - Texas Instruments |
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DAC7744EC/1K Datasheet(HTML) 22 Page - Texas Instruments |
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22 / 29 page  22 ® DAC7744 SYMBOL DESCRIPTION MIN TYP MAX UNITS tRCS CS LOW for Read 100 ns tRDS R/W HIGH to CS LOW 10 ns tRDH R/W HIGH after CS HIGH 10 ns tDZ CS HIGH to Data Bus in High Impedance 10 70 ns tCSD CS LOW to Data Bus Valid 85 130 ns tWCS CS LOW for Write 40 ns tWS R/W LOW to CS LOW 0 ns tWH R/W LOW after CS HIGH 10 ns tAS Address Valid to CS LOW 0 ns tAH Address Valid after CS HIGH 15 ns tLS CS LOW to LOADDACS HIGH 40 ns tLH CS LOW after LOADDACS HIGH 80 ns tLX LOADDACS HIGH 40 ns tDS Data Valid to CS LOW 0 ns tDH Data Valid after CS HIGH 15 ns tLWD LOADDACS LOW 40 ns tSS RSTSEL Valid Before RESET HIGH 0 ns tSH RSTSEL Valid After RESET HIGH 120 ns tRSS RESET LOW Before RESET HIGH 10 ns tRSH RESET LOW After RESET HIGH 10 ns tS Settling Time 11 µs TABLE II. Timing Specifications (TA = –40°C to +85°C). FIGURE 11. Digital Input and Output Timing. t RCS CS t RDS t RDH t AS t CSD t DZ t AH R/W A0/A1 Data Out Data Valid t WCS CS t WS t AS t AH t WH R/W A0/A1 t LS t LWD t LH t S ±0.003% of FSR Error Band ±0.003% of FSR Error Band t LX LOADDACS t DS t DH Data In V OUT Data Read Timing Data Write Timing t RSH RST V OUT,RESET SEL LOW +FS –FS t SS t SH RESET SEL V OUT,RESET SEL HIGH MS +FS –FS DAC7744 Reset Timing t RSS |
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