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AD7191 Datasheet(PDF) 4 Page - Analog Devices |
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AD7191 Datasheet(HTML) 4 Page - Analog Devices |
4 / 21 page AD7191 Rev. A | Page 3 of 20 SPECIFICATIONS AVDD = 3 V to 5.25 V; DVDD = 2.7 V to 5.25 V; AGND = DGND = 0 V; REFIN(+) = AVDD; REFIN(−) = AGND; MCLK = 4.92 MHz; all specifications TMIN to TMAX, unless otherwise noted. Table 1. Parameter1 AD7191B Unit Test Conditions/Comments Output Data Rate 10, 50, 60, 120 Hz nom No Missing Codes2 24 Bits min Resolution See the RMS Noise and Resolution Specifications section RMS Noise and Update Rates See the RMS Noise and Resolution Specifications section Integral Nonlinearity Gain = 12 ±10 ppm of FSR max ±2 ppm typical, AVDD = 5 V ±15 ppm of FSR max ±2 ppm typical., AVDD = 3 V Gain > 1 ±5 ppm of FSR typ AVDD = 5 V ±12 ppm of FSR typ AVDD = 3 V Offset Error ±150/gain μV typ Offset Error Drift vs. Temperature ±150/gain nV/°C typ Gain = 1 or 8 ±5 nV/°C typ Gain = 64 or 128 Offset Error Drift vs. Time 25 nV/1000 hours typ Gain = 64 or 128 Gain Error ±0.4 % typ Gain Drift vs. Temperature ±1 ppm/°C typ Gain Drift vs. Time 10 ppm/1000 hours typ Gain = 1 Power Supply Rejection 90 dB typ Gain = 1, AIN = 1 V 95 dB min 110 dB typical, gain > 1, AIN = 1 V/gain Normal Mode Rejection2 Internal Clock @ 50 Hz, 60 Hz 100 dB min 10 Hz output data rate, 50 ± 1 Hz, 60 ± 1 Hz 74 dB min 50 Hz output data rate, 50 ± 1 Hz, 60 ± 1 Hz @ 60 Hz 97 dB min 60 Hz output data rate, 60 ± 1 Hz. External Clock @ 50 Hz, 60 Hz 120 dB min 10 Hz output data rate, 50 ± 1 Hz, 60 ± 1 Hz. 82 dB min 50 Hz output data rate, 50 ± 1 Hz, 60 ± 1 Hz. @ 60 Hz 120 dB min 60 Hz output data rate, 60 ± 1 Hz Common-Mode Rejection @ DC2 100 dB min Gain = 1, AIN = 1 V @ DC 110 dB min Gain > 1, AIN = 1 V/gain @ 50 Hz, 60 Hz2 120 dB min 10 Hz output data rate, 50 ± 1 Hz, 60 ± 1 Hz @ 50 Hz, 60 Hz2 120 dB min 50 ± 1 Hz (50 Hz output data rate), 60 ± 1 Hz (60 Hz output data rate) ANALOG INPUTS Differential Input Voltage Ranges ±VREF/gain V nom VREF = REFIN(+) − REFIN(−), gain = 1, 8, 64, or 128 ±(AVDD – 1.25 V)/gain V min/V max Gain > 1 Absolute AIN Voltage Limits2 AGND + 250 mV V min AVDD − 250 mV V max |
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