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ADS8383IPFBT Datasheet(PDF) 6 Page - Texas Instruments |
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ADS8383IPFBT Datasheet(HTML) 6 Page - Texas Instruments |
6 / 29 page ADS8383 SLAS005B – DECEMBER 2002 – REVISED MAY 2003 www.ti.com 6 TIMING CHARACTERISTICS All specifications typical at –40 °C to 85°C, +VA = +VBD = 5 V (see Notes 1, 2, and 3) PARAMETER MIN TYP MAX UNIT tCONV Conversion time 1.5 µs tACQ Acquisition time 0.4 µs tpd1 CONVST low to conversion started (BUSY high) 10 50 ns tpd2 Propagation delay time, End of conversion to BUSY low 10 20 ns tw1 Pulse duration, CONVST low 40 ns tsu1 Setup time, CS low to CONVST low 20 ns tw2 Pulse duration, CONVST high 20 ns CONVST falling edge jitter 10 ps tw3 Pulse duration, BUSY signal low Min(tACQ) 1 µs tw4 Pulse duration, BUSY signal high 1.52 µs th1 Hold time, First data bus data transition (RD low, or CS low for read cycle, or BYTE or BUS18/16 input changes) after CONVST low 40 ns td1 Delay time, CS low to RD low 0 ns tsu2 Setup time, RD high to CS high 0 ns tw5 Pulse duration, RD low time 50 ns ten Enable time, RD low (or CS low for read cycle) to data valid 20 ns td2 Delay time, data hold from RD high 5 ns td3 Delay time, BUS18/16 or BYTE rising edge or falling edge to data valid 10 20 ns tw6 RD high 20 ns th2 Hold time, last RD (or CS for read cycle ) rising edge to CONVST falling edge 125 ns tpd4 Propagation delay time, BUSY falling edge to next RD (or CS for read cycle) falling edge Max(td5) ns td4 Delay time, BYTE edge to BUS18/16 edge skew 0 ns tsu3 Setup time, BYTE or BUS18/16 rising edge to RD falling edge 10 ns th3 Hold time, BYTE or BUS18/16 falling edge to RD falling edge 10 ns tdis Disable time, RD High (CS high for read cycle) to 3-stated data bus 20 ns td5 Delay time, BUSY low to MSB data valid 30 ns tsu4 Setup time, BYTE or BUS18/16 change before BUSY falling edge 10 20 µs (1) All input signals are specified with tr = tf = 5 ns (10% to 90% of +VBD) and timed from a voltage level of (VIL + VIH)/2. (2) See timing diagrams. (3) All timing are measured with 20 pF equivalent loads on all data bits and BUSY pins. |
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