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ADS1216 Datasheet(PDF) 4 Page - Texas Instruments |
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ADS1216 Datasheet(HTML) 4 Page - Texas Instruments |
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4 / 28 page  ADS1216 4 SBAS171B ELECTRICAL CHARACTERISTICS: AVDD = 3V All specifications TMIN to TMAX, AVDD = +3V, DVDD = +2.7V to 5.25V, fMOD = 19.2kHz, PGA = 1, Buffer ON, RDAC = 75kΩ, fDATA = 10Hz, VREF ≡ (REF IN+) – (REF IN–) = +1.25V unless otherwise specified. ADS1216 PARAMETER CONDITIONS MIN TYP MAX UNITS ANALOG INPUT (AIN0 – AIN7, AINCOM) Analog Input Range Buffer OFF AGND – 0.1 AVDD + 0.1 V Buffer ON AGND + 0.05 AVDD – 1.5 V Full-Scale Input Voltage Range (In+) – (In–) See Block Diagram ±V REF /PGA V Input Impedance Buffer OFF 5/ PGA M Ω Input Current Buffer ON 0.5 nA Bandwidth Fast Settling Filter –3dB 0.469 • fDATA Hz Sinc2 Filter –3dB 0.318 • fDATA Hz Sinc3 Filter –3dB 0.262 • fDATA Hz Programmable Gain Amplifier User Selectable Gain Ranges 1 128 Input Capacitance 9pF Input Leakage Current Modulator OFF, T = 25 °C5 pA Burnout Current Sources 2 µA OFFSET DAC Offset DAC Range ±V REF /(2 • PGA) V Offset DAC Monotonicity 8 Bits Offset DAC Gain Error ±10 % Offset DAC Gain Error Drift 2 ppm/ °C SYSTEM PERFORMANCE Resolution 24 Bits No Missing Codes sinc3 Filter 24 Bits Integral Non-Linearity End Point Fit ±0.0015 % of FS Offset Error(1) 15 ppm of FS Offset Drift(1) 0.04 ppm of FS/ °C Gain Error(1) 0.010 % Gain Error Drift(1) 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 Range REF IN+, REF IN– 0 AVDD V VREF VREF ≡ (REF IN+) – (REF IN–) 0.1 1.25 1.3 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 Short-Circuit Duration Sink or Source Indefinite Drift 15 ppm/ °C Noise VRCAP = 0.1µF, BW = 0.1Hz to 100Hz 10 µVp-p Output Impedance Sourcing 100 µA3 Ω Startup Time 50 µs 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 Maximum Short-Circuit Current Duration RDAC = 10kΩ Indefinite RDAC = 0Ω 10 Minute Monotonicity RDAC = 75kΩ 8 Bits Compliance Voltage 0AVDD – 1 V Output Impedance See Typical Characteristics PSRR VOUT = AVDD /2 600 ppm/V Absolute Error Individual IDAC 5 % Absolute Drift Individual IDAC 75 ppm/ °C Mismatch Error Between IDACs, Same Range and Code 0.25 % Mismatch Drift Between IDACs, Same Range and Code 15 ppm/ °C |
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