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AD7195BCPZ 데이터시트(PDF) 4 Page - Analog Devices |
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AD7195BCPZ 데이터시트(HTML) 4 Page - Analog Devices |
4 / 44 page AD7195 Rev. 0 | Page 4 of 44 Parameter Min Typ Max Unit Test Conditions/Comments1 External Clock @ 50 Hz, 60 Hz 100 dB 10 Hz output data rate, 50 ± 1 Hz, 60 ± 1 Hz 67 dB 50 Hz output data rate, REJ606 = 1, 50 ± 1 Hz, 60 ± 1 Hz @ 50 Hz 95 dB 50 Hz output data rate, 50 ± 1 Hz @ 60 Hz 95 dB 60 Hz output data rate, 60 ± 1 Hz ANALOG INPUTS Differential Input Voltage Ranges ±VREF/gain V VREF = REFIN(+) − REFIN(−), gain = 1 to 128 −(AVDD − 1.25 V)/gain +(AVDD − 1.25 V)/gain V Gain > 1 Absolute AIN Voltage Limits2 Unbuffered Mode AGND − 0.05 AVDD + 0.05 V Buffered Mode AGND + 0.25 AVDD − 0.25 V Analog Input Current Buffered Mode Input Current2 −2 +2 nA Gain = 1 −4.5 +4.5 nA Gain > 1 Input Current Drift ±5 pA/°C Unbuffered Mode Input Current ±5 μA/V Gain = 1, input current varies with input voltage ±1 μA/V Gain > 1 Input Current Drift ±0.05 nA/V/°C External clock ±1.6 nA/V/°C Internal clock REFERENCE INPUT REFIN Voltage 1 AVDD AVDD V REFIN = REFIN(+) − REFIN(−). The differential input must be limited to ±(AVDD − 1.25 V)/gain when gain > 1 Absolute REFIN Voltage Limits2 GND − 0.05 AVDD + 0.05 V Average Reference Input Current 7 μA/V Average Reference Input Current Drift ±0.03 nA/V/°C External clock ±1.3 nA/V/°C Internal clock Normal Mode Rejection2 Same as for analog inputs Common-Mode Rejection 95 dB Reference Detect Levels 0.3 0.6 V TEMPERATURE SENSOR Accuracy ±2 °C Applies after user calibration at 25°C Sensitivity 2815 Codes/°C Bipolar mode BRIDGE POWER-DOWN SWITCH RON 10 Ω Allowable Current2 30 mA Continuous current BURNOUT CURRENTS AIN Current 500 nA Analog inputs must be buffered and chop disabled DIGITAL OUTPUTS (ACXx, ACXx ) Output High Voltage, VOH2 4 V AVDD = 5 V, ISOURCE = 200 μA Output Low Voltage, VOL2 0.4 V AVDD = 5 V, ISINK = 800 μA INTERNAL/EXTERNAL CLOCK Internal Clock Frequency 4.72 5.12 MHz Duty Cycle 50:50 % External Clock/Crystal2 Frequency 2.4576 4.9152 5.12 MHz Input Low Voltage VINL 0.8 V DVDD = 5 V 0.4 V DVDD = 3 V Input High Voltage, VINH 2.5 V DVDD = 3 V 3.5 V DVDD = 5 V Input Current −10 +10 μA |
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