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Zakładka z wyszukiwarką danych komponentów |
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Zakładka z wyszukiwarką danych komponentów |
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ADS8380 Arkusz danych(PDF) 5 Page - Burr-Brown (TI) |
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ADS8380 Arkusz danych(HTML) 5 Page - Burr-Brown (TI) |
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5 / 29 page  www.ti.com TIMING REQUIREMENTS (1) (2) (3) (4) (5) (6) ADS8380 SLAS387A – NOVEMBER 2004 – REVISED DECEMBER 2004 ADS8380I/ADS8380IB REF PARAMETER UNIT FIGURE MIN TYP MAX tconv Conversion time 1000 1160 ns 41 – 44 tacq1 Acquisition time in normal mode 0.5 1000 µs 41,42,44 tacq2 Acquisition time in nap mode (tacq2 = tacq1 + td18) 0.8 1000 µs 43 CONVERSION AND SAMPLING Quite sampling time (last toggle of interface signals to convert start 40 – 43, tquiet1 30 ns command)(6) 45 – 47 Quite sampling time (convert start command to first toggle of interface 40 – 43, tquiet2 10 ns signals)(6) 45 – 47 Quite conversion time (last toggle of interface signals to fall of BUSY)(6) 40 – 43, tquiet3 600 ns 45,47 tsu1 Setup time, CONVST before BUSY fall 15 ns 41 tsu2 Setup time, CS before BUSY fall (only for conversion/sampling control) 20 ns 40,41 tsu4 Setup time, CONVST before CS rise (so CONVST can be recognized) 5 ns 41,43,44 th1 Hold time, CS after BUSY fall (only for conversion/sampling control) 0 ns 41 th3 Hold time, CONVST after CS rise 7 ns 43 th4 Hold time, CONVST after CS fall (to ensure width of CONVST_QUAL)(4) 20 ns 42 tw1 CONVST pulse duration 20 ns 43 tw2 CS pulse duration 10 ns 41,42 Pulse duration, time between conversion start command and conversion tw5 1000 ns 44 abort command to successfully abort the ongoing conversion DATA READ OPERATION tcyc SCLK period 25 ns 45 – 47 SCLK duty cycle 40% 60% tsu5 Setup time, CS fall before first SCLK fall 10 ns 45 tsu6 Setup time, CS fall before FS rise 7 ns 46,47 tsu7 Setup time, FS fall before first SCLK fall 7 ns 46,47 th5 Hold time, CS fall after SCLK fall 3 ns 45 th6 Hold time, FS fall after SCLK fall 7 ns 46,47 tsu2 Setup time, CS fall before BUSY fall (only for read control) 20 ns 40,45 tsu3 Setup time, FS fall before BUSY fall (only for read control) 20 ns 40,47 th2 Hold time, CS fall after BUSY fall (only for read control) 15 ns 40,45 th8 Hold time, FS fall after BUSY fall (only for read control) 15 ns 40,47 tw2 CS pulse duration 10 ns 45 tw3 FS pulse duration 10 ns 46,47 MISCELLANEOUS tw4 PD pulse duration for reset and power down 60 ns 53,54 All unspecified pulse durations 10 ns (1) All input signals are specified with tr = tf = 5 ns (10% to 90% of VDD) and timed from a voltage level of (VIL + VIH)/2. (2) All specifications typical at –40 °C to 85°C, +VA = +4.75 V to +5.25 V, +VBD = +2.7 V to +5.25 V. (3) All digital output signals loaded with 10-pF capacitors. (4) CONVST_QUAL is CONVST latched by a low value on CS (see Figure 39). (5) Reference figure indicated is only a representative of where the timing is applicable and is not exhaustive. (6) Quiet time zones are for meeting performance and not functionality. 5 |
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Podobny opis - ADS8380 |
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