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ADS8504IBDWR bảng dữ liệu(PDF) 3 Page - Burr-Brown (TI) |
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ADS8504IBDWR bảng dữ liệu(HTML) 3 Page - Burr-Brown (TI) |
3 / 19 page www.ti.com ADS8504 SLAS434 – JUNE 2005 ELECTRICAL CHARACTERISTICS (continued) T A = -40°C to 85°C, fs = 250 kHz, VDIG = VANA = 5 V, using internal reference (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Full-scale error(3)(4) Ext. 2.5-V Ref. -0.25 0.25 %FSR Full-scale error drift Ext. 2.5-V Ref. ±2 ppm/°C Bipolar zero error(3) -1 1 LSB Bipolar zero error drift ±0.4 ppm/°C Power supply sensitivity -0.5 0.5 +4.75 V < VD < +5.25 V LSB (VDIG = VANA = VD) AC ACCURACY SFDR Spurious-free dynamic range fI = 45 kHz 86 94 dB(5) THD Total harmonic distortion fI = 45 kHz -95 -86 dB fI = 45 kHz 72 73 dB SINAD Signal-to-(noise+distortion) –60-dB Input 32 dB SNR Signal-to-noise ratio fI = 45 kHz 72 73 dB Full-power bandwidth(6) 500 kHz SAMPLING DYNAMICS Aperture delay 5 ns Transient response FS Step 2 µs Overvoltage recovery(7) 150 ns REFERENCE Internal reference voltage 2.48 2.5 2.52 V Internal reference source current (must use 1 µA external buffer) Internal reference drift 8 ppm/°C External reference voltage range for specified 2.3 2.5 2.7 V linearity External reference current drain Ext. 2.5-V Ref. 100 µA DIGITAL INPUTS Logic levels VIL Low-level input voltage -0.3 0.8 V VIH High-level input voltage 2.0 VDIG +0.3 V V IIL Low-level input current ±10 µA IIH High-level input current ±10 µA DIGITAL OUTPUTS Data format (Parallel 12-bits) Data coding (Binary 2's complement) VOL Low-level output voltage ISINK = 1.6 mA 0.4 V VOH High-level output voltage ISOURCE = 500 µA 4 V Leakage current Hi-Z state, VOUT = 0 V to VDIG ±5 µA Output capacitance Hi-Z state 15 pF DIGITAL TIMING Bus access timing 83 ns Bus relinquish timing 83 ns (5) All specifications in dB are referred to a full-scale ±10-V input. (6) Full-power bandwidth is defined as the full-scale input frequency at which signal-to-(noise + distortion) degrades to 60 dB, or 10 bits of accuracy. (7) Recovers to specified performance after 2 x FS input overvoltage. 3 |
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