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ADS7817 Arkusz danych(PDF) 2 Page - Burr-Brown (TI) |
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ADS7817 Arkusz danych(HTML) 2 Page - Burr-Brown (TI) |
2 / 15 page 2 ® ADS7817 SPECIFICATIONS At –40 °C to +85°C, +V CC = +5V, VREF = +2.5V, fSAMPLE = 200kHz, fCLK = 16 • fSAMPLE, –In = +2.5V, unless otherwise specified. ADS7817 ADS7817B ADS7817C PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX MIN TYP MAX UNITS ANALOG INPUT Full-Scale Input Span +In – (–In) –VREF +VREF TT TT V Absolute Input Voltage +In –0.3 VCC +0.3 TT TT V –In –0.3 4 TT TT V Capacitance 15 TT pF Leakage Current ±1 TT µA SYSTEM PERFORMANCE Resolution 12 TT Bits No Missing Codes 11 12 T Bits Integral Linearity Error ±1 ±2 ±0.8 ±2 ±0.5 ±1 LSB(1) Differential Linearity Error ±1 ±2 ±0.7 ±1 ±0.4 ±1 LSB Offset Error ±1 ±6 TT TT LSB Gain Error ±0.5 ±4 TT TT LSB Noise 63 TT µVrms Common-Mode Rejection 80 TT dB Power Supply Rejection 82 TT dB SAMPLING DYNAMICS Conversion Time 12 TT Clk Cycles Acquisition Time 1.5 TT Clk Cycles Throughput Rate 200 TT kHz DYNAMIC CHARACTERISTICS Total Harmonic Distortion VIN = 5.0Vp-p at 1kHz –83 TT dB VIN = 5.0Vp-p at 5kHz –81 TT dB SINAD VIN = 5.0Vp-p at 1kHz 71 TT dB Spurious Free Dynamic Range VIN = 5.0Vp-p at 1kHz 86 TT dB REFERENCE INPUT Voltage Range 0.1 2.5 TT TT V Resistance CS = VCC 5 TT G Ω CS = GND, fSAMPLE = 0Hz 5 TT G Ω Current Drain At Code FF8h 20 100 TT TT µA fSAMPLE = 12.5kHz 1.3 20 TT TT µA CS = VCC 0.001 3 TT TT µA DIGITAL INPUT/OUTPUT Logic Family CMOS TT Logic Levels: VIH IIH = +5µA3 +VCC +0.3 TT TT V VIL IIL = +5µA –0.3 0.8 TT TT V VOH IOH = –250µA 3.5 TT V VOL IOL = 250µA 0.4 TT V Data Format Binary Two’s Complement TT POWER SUPPLY REQUIREMENTS VCC Specified Performance 4.75 5.25 TT TT V Quiescent Current 460 800 TT TT µA fSAMPLE = 12.5kHz(2, 3) 40 TT µA fSAMPLE = 12.5kHz(3) 330 TT µA Power Down CS =VCC, fSAMPLE = 0Hz 3 TT µA TEMPERATURE RANGE Specified Performance –40 +85 TT TT °C T Specifications same as ADS7817. NOTE: (1) LSB means Least Significant Bit, with VREF equal to +2.5V, one LSB is 1.22mV. (2) fCLK = 3.2MHz, CS = VCC for 241 clock cycles out of every 256. (3) See the Power Dissipation section for more information regarding lower sample rates. 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. |
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