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AD7712 Datasheet(PDF) 4 Page - Analog Devices |
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AD7712 Datasheet(HTML) 4 Page - Analog Devices |
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4 / 29 page  REV. F AD7712 –3– SPECIFICATIONS (continued) Parameter A, S Versions 1 Unit Conditions/Comments REFERENCE OUTPUT Output Voltage 2.5 V nom Initial Tolerance ±1% max Drift 20 ppm/ °C typ Output Noise 30 µV typ pk-pk Noise; 0.1 Hz to 10 Hz Bandwidth Line Regulation (AVDD)1 mV/V max Load Regulation 1.5 mV/mA max Maximum Load Current 1 mA External Current 1 mA max VBIAS INPUT 13 Input Voltage Range AVDD – 0.85 VREF See VBIAS Input Section or AVDD – 3.5 V max Whichever Is Smaller: +5 V/–5 V or +10 V/0 V Nominal AVDD/VSS or AVDD – 2.1 V max Whichever Is Smaller: +5 V/0 V Nominal AVDD/VSS VSS + 0.85 VREF See VBIAS Input Section or VSS + 3 V min Whichever Is Greater: +5 V/–5 V or +10 V/0 V Nominal AVDD/VSS or VSS + 2.1 V min Whichever Is Greater: +5 V/0 V Nominal AVDD/VSS VBIAS Rejection 65 to 85 dB typ Increasing with Gain LOGIC INPUTS Input Current ±10 µA max All Inputs except MCLK IN VINL, Input Low Voltage 0.8 V max VINH, Input High Voltage 2.0 V min MCLK IN Only VINL, Input Low Voltage 0.8 V max VINH, Input High Voltage 3.5 V min LOGIC OUTPUTS VOL, Output Low Voltage 0.4 V max ISINK = 1.6 mA VOH, Output High Voltage 4.0 V min ISOURCE = 100 µA Floating State Leakage Current ±10 µA max Floating State Output Capacitance 14 9 pF typ TRANSDUCER BURNOUT Current 4.5 µA nom Initial Tolerance ±10 % typ Drift 0.1 %/ °C typ SYSTEM CALIBRATION AIN1 Positive Full-Scale Calibration Limit 15 (1.05 VREF)/GAIN V max GAIN Is the Selected PGA Gain (Between 1 and 128) Negative Full-Scale Calibration Limit 15 –(1.05 VREF)/GAIN V max GAIN Is the Selected PGA Gain (Between 1 and 128) Offset Calibration Limit 16, 17 –(1.05 VREF)/GAIN V max GAIN Is the Selected PGA Gain (Between 1 and 128) Input Span 15 0.8 VREF/GAIN V min GAIN Is the Selected PGA Gain (Between 1 and 128) (2.1 VREF)/GAIN V max GAIN Is the Selected PGA Gain (Between 1 and 128) AIN2 Positive Full-Scale Calibration Limit 15 (4.2 VREF)/GAIN V max GAIN Is the Selected PGA Gain (Between 1 and 128) Negative Full-Scale Calibration Limit 15 –(4.2 VREF)/GAIN V max GAIN Is the Selected PGA Gain (Between 1 and 128) Offset Calibration Limit 17 –(4.2 VREF)/GAIN V max GAIN Is the Selected PGA Gain (Between 1 and 128) Input Span 15 3.2 VREF/GAIN V min GAIN Is the Selected PGA Gain (Between 1 and 128) (8.4 VREF)/GAIN V max GAIN Is the Selected PGA Gain (Between 1 and 128) NOTES 13The AD7712 is tested with the following V BIAS voltages. With AVDD = 5 V and VSS = 0 V, VBIAS = 2.5 V; with AVDD = 10 V and VSS = 0 V, VBIAS = 5 V and with AVDD = 5 V and VSS = –5 V, VBIAS = 0 V. 14Guaranteed by design, not production tested. 15After calibration, if the analog input exceeds positive full scale, the converter will output all 1s. If the analog input is less than negative full scale, then the device will output all 0s. 16These calibration and span limits apply provided the absolute voltage on the AIN1 analog inputs does not exceed AV DD + 30 mV or does not go more negative than VSS – 30 mV. 17The offset calibration limit applies to both the unipolar zero point and the bipolar zero point. |
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