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ADuC847BCPZ62-3 Datasheet(PDF) 4 Page - Analog Devices |
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ADuC847BCPZ62-3 Datasheet(HTML) 4 Page - Analog Devices |
4 / 108 page ADuC845/ADuC847/ADuC848 Data Sheet Rev. C | Page 4 of 108 SPECIFICATIONS1 AVDD = 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; all specifications TMIN to TMAX, unless otherwise noted. Input buffer on for primary ADC, unless otherwise noted. Core speed = 1.57 MHz (default CD = 3), unless otherwise noted. Table 1. Parameter Min Typ Max Unit Conditions PRIMARY ADC Conversion Rate 5.4 105 Hz Chop on (ADCMODE.3 = 0) 16.06 1365 Hz Chop off (ADCMODE.3 = 1) No Missing Codes2 24 Bits ≤26.7 Hz update rate with chop enabled 24 Bits ≤80.3 Hz update rate with chop disabled Resolution (ADuC845/ADuC847) See Table 11 and Table 15 Resolution (ADuC848) See Table 13 and Table 17 Output Noise (ADuC845/ADuC847) See Table 10 and Table 14 μV (rms) Output noise varies with selected update rates, gain range, and chop status. Output Noise (ADuC848) See Table 12 and Table 16 μV (rms) Output noise varies with selected update rates, gain range, and chop status. Integral Nonlinearity ±15 ppm of FSR 1 LSB16 Offset Error3 ±3 μV Chop on Chop off, offset error is in the order of the noise for the programmed gain and update rate following a calibration. Offset Error Drift vs. Temperature2 ±10 nV/°C Chop on (ADCMODE.3 = 0) ±200 nV/°C Chop off (ADCMODE.3 = 1) Full-Scale Error4 ADuC845/ADuC847 ±10 μV ±20 mV to ±2.56 V ADuC848 ±10 μV ±20 mV to ±640 mV ±0.5 LSB16 ±1.28 V to ±2.56 V Gain Error Drift vs. Temperature4 ±0.5 ppm/°C Power Supply Rejection 80 dB AIN = 1 V, ±2.56 V, chop enabled 113 dB AIN = 7.8 mV, ±20 mV, chop enabled 80 dB AIN = 1 V, ±2.56 V, chop disabled2 PRIMARY ADC ANALOG INPUTS Differential Input Voltage Ranges 5, 6 Gain = 1 to 128 Bipolar Mode (ADC0CON1.5 = 0) ±1.024 × VREF/GAIN V VREF = REFIN(+) − REFIN(−) or REFIN2(+) − REFIN2(−) (or Int 1.25 VREF) Unipolar Mode (ADC0CON1.5 = 1) 0 – 1.024 × VREF/GAIN V VREF = REFIN(+) − REFIN(−) or REFIN2(+) − REFIN2(−) (or Int 1.25 VREF) ADC Range Matching ±2 μV AIN = 18 mV, chop enabled Common-Mode Rejection DC Chop enabled, chop disabled On AIN 95 dB AIN = 7.8 mV, range = ±20 mV 113 dB AIN = 1 V, range = ±2.56 V Common-Mode Rejection 50 Hz/60 Hz2 50 Hz/60 Hz ± 1 Hz, 16.6 Hz and 50 Hz update rate, chop enabled, REJ60 enabled On AIN 95 dB AIN = 7.8 mV, range = ±20 mV 90 dB AIN = 1 V, range = ±2.56 V Footnotes at end of table. |
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