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AD7718BRU Datasheet(PDF) 3 Page - Analog Devices |
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AD7718BRU Datasheet(HTML) 3 Page - Analog Devices |
3 / 44 page REV. 0 –3– AD7708/AD7718 Parameter B Grade Unit Test Conditions AD7718 (CHOP DISABLED) Output Update Rate 16.06 Hz min CHOP = 1 1.365 kHz max No Missing Codes 2 24 Bits min Resolution 13 Bits p-p ±20 mV Range, SF = 69 18 Bits p-p ±2.56 V Range, SF = 69 Output Noise and Update Rates See Tables in ADC Description Integral Nonlinearity ±10 ppm of FSR max 2 ppm Typical Offset Error 3 Table VII µV typ Offset Error is in the order of the noise for the programmed gain and update rate following a calibration Offset Error Drift vs. Temp 4 ±200 nV/ °C typ Full-Scale Error 3 ±10 µV typ Gain Drift vs. Temp 4 ±0.5 ppm/ °C typ Negative Full-Scale Error ±0.003 % FSR max ANALOG INPUTS Differential Input Full-Scale Voltage ±1.024 × REFIN/GAIN V nom REFIN Refers to Both REFIN1 and REFIN2. REFIN = REFIN(+) –REFIN(–) GAIN = 1 to 128 Absolute AIN Voltage Limits AGND + 100 mV V min AIN1–AIN10 and AINCOM with AVDD – 100 mV V max NEGBUF = 1 Absolute AINCOM Voltage Limits AGND – 30 mV V min NEGBUF = 0 AVDD + 30 mV V max Analog Input Current AIN1–AIN10 and AINCOM with NEGBUF = 1 DC Input Current 2 ±1 nA max DC Bias Current Drift ±5pA/°C typ AINCOM Input Current NEGBUF = 0 DC Input Current 2 ±125 nA/V typ ±2.56 V Range DC Bias Current Drift ±2 pA/V/ °C typ Normal-Mode Rejection 2 @ 50 Hz 100 dB min 50 Hz ± 1 Hz, SF Word = 82 @ 60 Hz 100 dB min 60 Hz ± 1 Hz, SF Word = 68 Common-Mode Rejection @ DC 90 dB min 100 dB typ, Analog Input = 1 V, Input Range = ±2.56 V 110 dB typ on ±20 mV Range @ 50 Hz 100 dB typ 50 Hz ± 1 Hz, SF Word = 82 @ 60 Hz 100 dB typ 60 Hz ± 1 Hz, SF Word = 68 REFERENCE INPUTS (REFIN1 AND REFIN2) REFIN(+) to REFIN(–) Voltage 2.5 V nom REFIN Refers to Both REFIN1 and REFIN2 REFIN(+) to REFIN(–) Range 2 1V min AVDD V max REFIN Common-Mode Range AGND – 30 mV V min AVDD + 30 mV V max Reference DC Input Current 0.5 µA/V typ Reference DC Input Current Drift ±0.1 nA/V/ °C typ Normal-Mode Rejection 2 @ 50 Hz 100 dB min 50 Hz ± 1 Hz, SF Word = 82 @ 60 Hz 100 dB min 60 Hz ± 1 Hz, SF Word = 68 Common-Mode Rejection Input Range = ±2.56 V @ DC 100 dB typ Analog Input = 1 V. Input Range = ±2.56 V @ 50 Hz 100 dB typ @ 60 Hz 100 dB typ AD7718 SPECIFICATIONS1 (AV DD = 2.7 V to 3.6 V or 4.75 V to 5.25 V, DVDD = 2.7 V to 3.6 V or 4.75 V to 5.25 V, REFIN(+) = 2.5 V; REFIN(–) = AGND; AGND = DGND = 0 V; XTAL1/XTAL2 = 32.768 kHz Crystal Input Buffer Enabled. All specifications TMIN to TMAX unless otherwise noted.) |
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