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AD7797 Datasheet(PDF) 3 Page - Analog Devices |
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AD7797 Datasheet(HTML) 3 Page - Analog Devices |
3 / 24 page AD7796/AD7797 Rev. A | Page 3 of 24 SPECIFICATIONS AVDD = 2.7 V to 5.25 V, DVDD = 2.7 V to 5.25 V, GND = 0 V, all specifications TMIN to TMAX, unless otherwise noted. Table 1. Parameter AD7796B/AD7797B1 Unit Test Conditions/Comments ADC CHANNEL Output Update Rate 4.17 to 123 Hz nom No Missing Codes2 24 Bits min AD7797 only 16 Bits min AD7796 only Resolution See Table 7 and Table 8 RMS Noise and Update Rates See Table 6 Integral Nonlinearity ±10 ppm of FSR typ Offset Error3, 4 ±1 μV typ Offset Error Drift vs. Temperature4 ±10 nV/°C typ Full-Scale Error3, 4, 5 ±10 μV typ Gain Drift vs. Temperature4 ±3 ppm/°C typ Power Supply Rejection 90 dB min AIN = 1 V/128 ANALOG INPUTS Differential Input Voltage Ranges ±VREF/128 V nom VREF = REFIN(+) – REFIN(–) Absolute AIN Voltage Limits2 GND + 300 mV V min AVDD − 1.1 V max Common-Mode Voltage, VCM 0.5 V min VCM = (AIN(+) + AIN(–))/2 Analog Input Current Average Input Current2 ±250 pA max Update rate < 100 Hz Average Input Current Drift ±2 pA/°C typ Normal Mode Rejection2 Internal Clock @ 50 Hz, 60 Hz 65 dB min 80 dB typ, 50 ± 1 Hz, 60 ± 1 Hz, FS[3:0] = 10106 @ 50 Hz 80 dB min 90 dB typ, 50 ± 1 Hz, FS[3:0] = 10016 @ 60 Hz 90 dB min 100 dB typ, 60 ± 1 Hz, FS[3:0] = 10006 External Clock @ 50 Hz, 60 Hz 80 dB min 90 dB typ, 50 ± 1 Hz, 60 ± 1 Hz, FS[3:0] = 10106 @ 50 Hz 94 dB min 100 dB typ, 50 ± 1 Hz, FS[3:0] = 10016 @ 60 Hz 90 dB min 100 dB typ, 60 ± 1 Hz, FS[3:0] = 10006 Common-Mode Rejection @ DC 90 dB min AIN = 7.81 mV @ 50 Hz, 60 Hz2 90 dB min 50 ± 1 Hz, 60 ± 1 Hz, FS[3:0] = 10106 @ 50 Hz, 60 Hz2 90 dB min 50 ± 1 Hz (FS[3:0] = 10016), 60 ± 1 Hz, FS[3:0] = 10006 REFERENCE External REFIN Voltage 2.5 V nom REFIN = REFIN(+) – REFIN(–) Reference Voltage Range2 0.1 V min AVDD V max Absolute REFIN Voltage Limits2 GND − 30 mV V min AVDD + 30 mV V max Average Reference Input Current 400 nA/V typ Average Reference Input Current Drift ±0.03 nA/V/°C typ Normal Mode Rejection Same as for analog inputs Common-Mode Rejection 100 dB typ TEMPERATURE SENSOR Accuracy ±2 °C typ Applies if user calibrates the temperature sensor Sensitivity 0.81 mV/°C typ |
Similar Part No. - AD7797_15 |
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Similar Description - AD7797_15 |
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