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ADS1208IPW Datasheet(PDF) 3 Page - Texas Instruments |
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ADS1208IPW Datasheet(HTML) 3 Page - Texas Instruments |
3 / 25 page www.ti.com ELECTRICAL CHARACTERISTICS ADS1208 SBAS348A – MARCH 2005 – REVISED MARCH 2005 Over recommended operating free-air temperature range at –40°C to +85°C, AV DD = BVDD = +5V, VREF = internal +2.5V, Mode 3, MCLK input = 20MHz, differential input voltage = 200mV PP, common-mode voltage = 1.4V, and 16-bit Sinc 3 filter with OSR = 256, unless otherwise noted. ADS1208I PARAMETER TEST CONDITIONS MIN TYP(1) MAX UNIT Resolution 16 Bits DC Accuracy Integral nonlinearity(2) 16-bit resolution –8 1.6 8 LSB Integral nonlinearity –0.012 0.0025 0.012 % Differential nonlinearity(3) 16-bit resolution –1.0 1.0 LSB Input offset(4) –2.0 –1.4 0 mV Input offset drift 2.0 8.0 µV/°C Gain error(4) Referenced to voltage at REFIN –1.25 –0.7 1.25 % Gain error drift Referenced to voltage at REFIN 15 ppm/°C Power-supply rejection ratio 66 dB Analog Input Full-scale range VIN+– VIN– –125 125 mV Operating common-mode signal 0.8 1.4 2.5 V Input capacitance 5.0 pF Common-mode rejection 95 dB Current Source (IOUT) Output current(5) IOUT 1.0 5.0 8.0 mA Voltage at IOUT pin VOUT 0 AVDD – 1.0 V Voltage between AVDD pin and IADJ VADJ at IOUT = 1mA to 8mA 480 500 520 mV Internal Voltage Reference Reference output voltage REFOUT 2.45 2.5 2.55 V Reference temperature drift 20 ppm/°C Output resistance 0.3 Ω Output source current 3.0 mA Power-supply rejection ratio 60 dB Startup time 0.1 ms Voltage Reference Input Reference voltage input REFIN 0.5 3.0 V Reference input capacitance 5 pF Reference input current -50 +50 nA Internal Clock for Modes 0, 1 and 2 Clock frequency 8.0 10.1 12.0 MHz External Clock for Mode 3 Clock frequency 1.0 24.0 MHz (1) All values are at TA = 25°C. (2) Integral nonlinearity is defined as the maximum deviation of the line through the end points of the specified input range of the transfer curve for VIN+– VIN– = –100mV to +100mV, expressed either as the number of LSBs or as a percent of the measured input range (200mV). (3) Ensured by design. (4) Maximum values, including temperature drift, are ensured over the full specified temperature range. (5) It is possible to leave pin IOUT unconnected (IOUT = 0mA). 3 |
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