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ADS7891 Arkusz danych(PDF) 4 Page - Texas Instruments |
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ADS7891 Arkusz danych(HTML) 4 Page - Texas Instruments |
4 / 31 page ADS7891 SLAS410 − DECEMBER 2003 www.ti.com 4 SPECIFICATIONS Continued TA = −40°C to 85°C, +VA = 5 V, +VBD = 5 V or 3.3 V, Vref = 2.5 V, fsample = 3 MHz (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT INTERNAL REFERENCE OUTPUT Start-up time From 95% (+VA), with 1- µF storage capacitor on REFOUT to AGND 120 msec VREF Range IOUT=0 2.48 2.5 2.52 V Source current Static load 10 µA Line regulation +VA = 4.75 V to 5.25 V 1 mV Drift IOUT = 0 25 PPM/C DIGITAL INPUT/OUTPUT Logic family CMOS VIH IIH = 5 µA +VBD −1 +VBD + 0.3 V Logic level VIL IIL = 5 µA −0.3 0.8 V Logic level VOH IOH = 2 TTL loads +VBD − 0.6 +VBD V VOL IOL = 2 TTL loads 0 0.4 V Data format Straight Binary POWER SUPPLY REQUIREMENTS Power supply voltage +VBD 2.7 3.3 5.25 V Power supply voltage +VA 4.75 5 5.25 V Supply current, +VA, 3 MHz sample rate 17 18 mA Power dissipation, 3 MHz sample rate +VA = 5 V 85 90 mW NAP MODE Supply current, +VA 2 3 mA Power-up time(1) 60 nsec POWER DOWN Supply current, +VA 2 2.5 µA Power down time(2) From simulation results 10 µsec Power up time 1- µF Storage capacitor on REFOUT to AGND 25 msec Invalid conversions after power up or reset 4 Numbers TEMPERATURE RANGE Operating free-air −40 85 °C (1) Minimum acquisition time for first sampling after the end of nap state must be 60 nsec more than normal. (2) Time required to reach level of 2.5 µA. |
Podobny numer części - ADS7891 |
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