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ADuC845BCPZ62-3 Datasheet(PDF) 5 Page - Analog Devices |
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ADuC845BCPZ62-3 Datasheet(HTML) 5 Page - Analog Devices |
5 / 108 page Data Sheet ADuC845/ADuC847/ADuC848 Rev. C | Page 5 of 108 Parameter Min Typ Max Unit Conditions Normal Mode Rejection 50 Hz/60 Hz2 On AIN 75 dB 50 Hz/60 Hz ± 1 Hz, 16.6 Hz Fadc, SF = 52H, chop on, REJ60 on 100 dB 50 Hz ± 1 Hz, 16.6 Hz Fadc, SF = 52H, chop on 67 dB 50 Hz/60 Hz ± 1 Hz, 50 Hz Fadc, SF = 52H, chop off, REJ60 on 100 dB 50 Hz ± 1 Hz, 50 Hz Fadc, SF = 52H, chop off Analog Input Current2 ±1 nA TMAX = 85°C, buffer on ±5 nA TMAX = 125°C, buffer on Analog Input Current Drift ±5 pA/°C TMAX = 85°C, buffer on ±15 pA/°C TMAX = 125°C, buffer on Average Input Current ±125 nA/V ±2.56 V range, buffer bypassed Average Input Current Drift ±2 pA/V/°C Buffer bypassed Absolute AIN Voltage Limits2 AGND + 0.1 AVDD − 0.1 V AIN1…AIN10 and AINCOM with buffer enabled Absolute AIN Voltage Limits2 AGND − 0.03 AVDD + 0.03 V AIN1…AIN10 and AINCOM with buffer bypassed EXTERNAL REFERENCE INPUTS REFIN(+) to REFIN(–) Voltage 2.5 V REFIN refers to both REFIN and REFIN2 REFIN(+) to REFIN(–) Range2 1 AVDD V REFIN refers to both REFIN and REFIN2 Average Reference Input Current ±1 µA/V Both ADCs enabled Average Reference Input Current Drift ±0.1 nA/V/°C NOXREF Trigger Voltage 0.3 0.65 V NOXREF (ADCSTAT.4) bit active if VREF > 0.3 V, and inactive if VREF > 0.65 V Common-Mode Rejection DC Rejection 125 dB AIN = 1 V, range = ±2.56 V 50 Hz/60 Hz Rejection2 90 dB 50 Hz/60 Hz ± 1 Hz, AIN = 1 V, range = ±2.56 V, SF = 82 Normal Mode Rejection 50 Hz/60 Hz2 75 dB 50 Hz/60 Hz ±1 Hz, AIN = 1 V, range = ±2.56 V, SF = 52H, chop on, REJ60 on 100 dB 50 Hz ± 1 Hz, AIN = 1 V, range = ±2.56 V, SF = 52H, chop on 67 dB 50 Hz/60 Hz ± 1 Hz, AIN = 1 V, range = ±2.56 V, SF = 52H, chop off, REJ60 on 100 dB 50 Hz ± 1 Hz, AIN = 1 V, range = ±2.56 V, SF = 52H, chop off AUXILIARY ADC (ADuC845 Only) Conversion Rate 5.4 105 Hz Chop on 16.06 1365 Hz Chop off No Missing Codes2 24 Bits ≤26.7 Hz update rate, chop enabled 24 Bits 80.3 Hz update rate, chop disabled Resolution See Table 19 and Table 21 Output Noise See Table 18 and Table 20 Output noise varies with selected update rates. Integral Nonlinearity ±15 ppm of FSR 1 LSB16 Offset Error3 ±3 µV Chop on ±0.25 LSB16 Chop off Offset Error Drift2 10 nV/°C Chop on 200 nV/°C Chop off Full-Scale Error4 ±0.5 LSB16 Gain Error Drift4 ±0.5 ppm/°C Power Supply Rejection 80 dB AIN = 1 V, range = ±2.56 V, chop enabled 80 dB AIN = 1 V, range = ±2.56 V, chop disabled Footnotes at end of table. |
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