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ADS7819UB bảng dữ liệu(PDF) 2 Page - Texas Instruments |
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ADS7819UB bảng dữ liệu(HTML) 2 Page - Texas Instruments |
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2 / 13 page  2 ® ADS7819 SPECIFICATIONS At T A = –40°C to +85°C, fS = 800kHz, +VDIG = +VANA = +5V, –VANA = –5V, using internal reference and the 50Ω input resistor shown in Figure 4b, unless otherwise specified. The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes no responsibility for the use of this information, and all use of such information shall be entirely at the user’s own risk. Prices and specifications are subject to change without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant any BURR-BROWN product for use in life support devices and/or systems. ADS7819P, U ADS7819PB, UB PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS RESOLUTION 12 * Bits ANALOG INPUT Voltage Range ±2.5 * V Impedance 3.1 * k Ω Capacitance 5* pF THROUGHPUT SPEED Conversion Time 940 * ns Complete Cycle Acquire & Convert 1250 * ns Throughput Rate 800 * kHz DC ACCURACY Integral Linearity Error ±1 ±0.75 LSB(1) Differential Linearity Error ±1 * LSB No Missing Codes Guaranteed * Transition Noise(2) 0.1 * LSB Full Scale Error(3, 4) ±0.5 ±0.25 % Full Scale Error Drift ±12 * ppm/ °C Full Scale Error(3, 4) Ext. 2.5000V Ref ±0.5 * % Full Scale Error Drift Ext. 2.5000V Ref ±12 * ppm/ °C Bipolar Zero Error(3) ±8 ±4 LSB Bipolar Zero Error Drift ±2 * ppm/ °C Power Supply Sensitivity (+VDIG = +VANA = VD) +4.75V < VD < +5.25V ±5 * LSB –5.25V < –VANA < –4.75V ±0.5 * LSB AC ACCURACY Spurious-Free Dynamic Range fIN = 250kHz 74 84 77 85 dB(5) Total Harmonic Distortion fIN = 250kHz –82 –74 –83 –77 dB Signal-to-(Noise+Distortion) fIN = 250kHz 68 71 70 * dB Signal-to-Noise fIN = 250kHz 68 71 70 * dB Usable Bandwidth(6) 1.5 * MHz SAMPLING DYNAMICS Aperture Delay 20 * ns Aperture Jitter 10 * ps Transient Response FS Step 180 * ns Overvoltage Recovery(7) 250 * ns REFERENCE Internal Reference Voltage 2.48 2.5 2.52 * * * V Internal Reference DC Source Current 100 * µA (External load should be static) Internal Reference Drift 6 ppm/ °C External Reference Voltage Range 2.3 2.5 2.7 * * * V For Specified Linearity External Reference Current Drain Ext. 2.5000V Ref 100 * µA DIGITAL INPUTS Logic Levels VIL –0.3 +0.8 * * V VIH +2.4 VD + 0.3 * * V IIL VIL = 0V ±10 * µA IIH VIH = 5V ±10 * µA DIGITAL OUTPUTS Data Format Parallel 12-bits Data Coding Binary Two’s Complement VOL ISINK = 1.6mA +0.4 * V VOH ISOURCE = 500µA +2.8 * V Leakage Current High-Z State, ±5* µA VOUT = 0V to VDIG Output Capacitance High-Z State 15 * pF DIGITAL TIMING Bus Access Time 62 * ns Bus Relinquish Time 83 * ns |
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