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DAC7800 Datasheet(PDF) 4 Page - Texas Instruments |
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DAC7800 Datasheet(HTML) 4 Page - Texas Instruments |
4 / 17 page DAC7800, 7801, 7802 4 SBAS005A www.ti.com DATA CS CLK t 1 t 5 UPD A UPD B t 3 t 7 CLR t 6 t 8 t 4 0V 5V 5V 5V 5V 0V NOTES: (1) All input signal rise and fall times are measured from 10% to 90% of +5V. t = t = 5ns. (2) Timing measurement reference level is V + V 2 F R IH IL . t 2 PARAMETER MINIMUM t1 — Data Setup Time 15ns t2 — Data Hold Time 15ns t3 — Chip Select to CLK, 15ns Update, Data Setup Time t4 — Chip Select to CLK, 40ns Update, Data Hold Time t5 — CLK Pulse Width 40ns t6 — Clear Pulse Width 40ns t7 — Update Pulse Width 40ns t8 — CLK Edge to UPD A 15ns or UPD B TIMING CHARACTERISTICS VDD = +5V, VREF A = VREF B = +10V, TA = –40°C to +85°C. Data In Bit 0 Bit 23 Bit 22 Bit 21 Bit 20 Bit 19 Bit 18 Bit 17 Bit 16 Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 LSB DAC A MSB DAC A LSB DAC B MSB DAC B DAC7800 Data Input Sequence DAC7800 Digital Interface Block Diagram 24-Bit Shift Register DAC A Register UPD A Data In CLK UPD B LSB MSB DAC B Register LSB MSB Bit 23 Bit 12 Bit 11 Bit 0 CLK DATA INPUT FORMAT DAC7800 (Cont.) |
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