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ADS1240 Datasheet(PDF) 3 Page - Texas Instruments |
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ADS1240 Datasheet(HTML) 3 Page - Texas Instruments |
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3 / 30 page  ADS1240, 1241 3 SBAS173F www.ti.com ELECTRICAL CHARACTERISTICS: AVDD = 5V All specifications TMIN to TMAX, AVDD = +5V, DVDD = +2.7V to 5.25V, fMOD = 19.2kHz, PGA = 1, Buffer ON, fDATA = 15Hz, and VREF = +2.5V, unless otherwise specified. ADS1240 ADS1241 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 Range (In+) – (In–), See Block Diagram, RANGE = 0 ±V REF /PGA V RANGE = 1 ±V REF /(2 • PGA) V Differential Input Impedance Buffer OFF 5/PGA M Ω Buffer ON 5 G Ω Bandwidth fDATA = 3.75Hz –3dB 1.65 Hz fDATA = 7.50Hz –3dB 3.44 Hz fDATA = 15.00Hz –3dB 14.6 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 RANGE = 0 ±V REF /(2 • PGA) V RANGE = 1 ±V REF /(4 • PGA) V Offset Monotonicity 8 Bits Offset DAC Gain Error ±10 % Offset DAC Gain Error Drift 1 ppm/ °C SYSTEM PERFORMANCE Resolution No Missing Codes 24 Bits Integral Nonlinearity End Point Fit ±0.0015 % of FS Offset Error (1) 7.5 ppm of FS Offset Drift(1) 0.02 ppm of FS/ °C Gain Error 0.005 % Gain Error Drift(1) 0.5 ppm/ °C Common-Mode Rejection at DC 100 dB fCM = 60Hz, fDATA = 15Hz 130 dB fCM = 50Hz, fDATA = 15Hz 120 dB Normal-Mode Rejection fSIG = 50Hz, fDATA = 15Hz 100 dB fSIG = 60Hz, fDATA = 15Hz 100 dB Output Noise See Typical Characteristics Power-Supply Rejection at DC, dB = –20 log( ∆V OUT /∆VDD) (2) 80 95 dB VOLTAGE REFERENCE INPUT VREF VREF ≡ (REF IN+) – (REF IN–), RANGE = 0 0.1 2.5 2.6 V Reference Input Range REF IN+, REF IN– 0 AVDD V RANGE = 1 0.1 AVDD V Common-Mode Rejection at DC 120 dB Common-Mode Rejection fVREFCM = 60Hz, fDATA = 15Hz 120 dB Bias Current(3) VREF = 2.5V 1.3 µA POWER-SUPPLY REQUIREMENTS Power-Supply Voltage AVDD 4.75 5.25 V Analog Current PDWN = 0, or SLEEP 1 nA PGA = 1, Buffer OFF 120 250 µA PGA = 128, Buffer OFF 400 675 µA PGA = 1, Buffer ON 160 300 µA PGA = 128, Buffer ON 760 1275 µA Digital Current Normal Mode, DVDD = 5V 80 125 µA SLEEP Mode, DVDD = 5V 60 µA Read Data Continuous Mode, DVDD = 5V 230 µA PDWN 0.5 nA Power Dissipation PGA = 1, Buffer OFF, DVDD = 5V 1.1 1.9 mW NOTES: (1) Calibration can minimize these errors to the level of the noise. (2) ∆V OUT is a change in digital result. (3) 12pF switched capacitor at fSAMP clock frequency. |
Número de pieza similar - ADS1240_16 |
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Descripción similar - ADS1240_16 |
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