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ADS1217IPFBT bảng dữ liệu(PDF) 4 Page - Texas Instruments |
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ADS1217IPFBT bảng dữ liệu(HTML) 4 Page - Texas Instruments |
4 / 33 page ADS1217 4 SBAS260C www.ti.com ELECTRICAL CHARACTERISTICS: AVDD = 3V All specifications at –40 °C to +85°C, AV DD = +3V, DVDD = +2.7V to 5.25V, fMOD = 19.2kHz, PGA = 1, Buffer ON, RDAC = 75kΩ, fDATA = 10Hz, and VREF = +1.25V, unless otherwise specified. ADS1217 PARAMETER CONDITIONS MIN TYP MAX UNITS ANALOG INPUT (AIN0 – AIN7, AINCOM) Full-Scale Input Voltage (AIN+) – (AIN–) ±2V REF /PGA V Analog Input Range Buffer OFF AGND – 0.1 AVDD + 0.1 V Buffer ON AGND + 0.05 AVDD – 1.5 V Input Impedance Buffer OFF 10/ PGA M Ω Input Current Buffer ON 0.5 nA Bandwidth Fast Settling Filter –3dB 0.469fDATA Hz Sinc2 Filter –3dB 0.318fDATA Hz Sinc3 Filter –3dB 0.262fDATA Hz Programmable Gain Amplifier User Selectable Gain Ranges 1 128 Burnout Current Sources 2 µA OFFSET DAC Offset DAC Range ±V REF /(PGA) V Offset DAC Monotonicity 8 Bits Offset DAC Gain Error ±1% Offset DAC Gain Error Drift 2 ppm/ °C SYSTEM PERFORMANCE Resolution 24 Bits No Missing Codes Sinc3 Filter 24 Bits Integral Nonlinearity End Point Fit, Differential Input, 0.0003 0.0012 % of FSR(1) Buffer Off, T = 25 °C Offset Error Before Calibration 15 ppm of FSR Offset Drift 0.04 ppm of FSR/ °C Gain Error After Calibration 0.010 % Gain Error Drift 1.0 ppm/ °C Common-Mode Rejection at DC 100 dB fCM = 60Hz, fDATA = 10Hz 130 dB fCM = 50Hz, fDATA = 50Hz 120 dB fCM = 60Hz, fDATA = 60Hz 120 dB Normal-Mode Rejection fSIG = 50Hz, fDATA = 50Hz 100 dB fSIG = 60Hz, fDATA = 60Hz 100 dB Output Noise See Typical Characteristics Power-Supply Rejection at DC, dB = –20 log( ∆V OUT /∆VDD) (2) 75 90 dB VOLTAGE REFERENCE INPUT Reference Input (VREF)VREF ≡ (VREF+) – (VREF–) 0.1 1.25 1.3 V Negative Reference Input (VREF–) AGND – 0.1 (VREF+) – 0.1 V Positive Reference Input (VREF+)(VREF–) + 0.1 AVDD + 0.1 V Common-Mode Rejection at DC 120 dB Common-Mode Rejection fVREFCM = 60Hz, fDATA = 60Hz 120 dB Bias Current(3) VREF = 1.25V 0.65 µA ON-CHIP VOLTAGE REFERENCE Output Voltage REF HI = 0 1.2 1.25 1.3 V Short-Circuit Current Source 3mA Short-Circuit Current Sink 50 µA Drift 15 ppm/ °C Noise VRCAP = 0.1µF, BW = 0.1Hz to 100Hz 10 µVrms Output Impedance Sourcing 100 µA3 Ω Startup Time 5ms IDAC Full-Scale Output Current RDAC = 75kΩ, Range = 1 0.5 mA RDAC = 75kΩ, Range = 2 1 mA RDAC = 75kΩ, Range = 3 2 mA RDAC = 15kΩ, Range = 3 20 mA Current Setting Resistance (RDAC)10 k Ω Monotonicity RDAC = 75kΩ 8 Bits Compliance Voltage 0AVDD – 1V Output Impedance See Typical Characteristics PSRR VOUT = AVDD /2, Code > 16 600 ppm/V Gain Error Individual IDAC 5 % Gain Error Drift Individual IDAC 75 ppm/ °C Gain Error Mismatch Between IDACs, Same Range and Code 0.25 % Gain Error Mismatch Drift Between IDACs, Same Range and Code 15 ppm/ °C NOTES: (1) FSR is Full-Scale Range. (2) ∆V OUT is change in digital result. (3) 12pF switched capacitor at fSAMP clock frequency. |
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