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AD7798 Folha de dados(PDF) 4 Page - Analog Devices |
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AD7798 Folha de dados(HTML) 4 Page - Analog Devices |
4 / 17 page AD7798/AD7799 Data Sheet Rev. B | Page 4 of 28 Parameter AD7798B/AD7799B1 Unit Test Conditions/Comments REFERENCE External REFIN Voltage 2.5 V nom REFIN = REFIN(+) − REFIN(−) Reference Voltage Range2 0.1 V min AVDD V max When VREF = AVDD, the differential input must be limited to (0.9 x VREF/gain) if the in-amp is active. 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 Reference Detect Levels 0.3 V min 0.65 V max NOXREF bit active if VREF < 0.3 V LOW-SIDE POWER SWITCH RON 7 Ω max AVDD = 5 V 9 Ω max AVDD = 3 V Allowable Current2 30 mA max Continuous current DIGITAL OUTPUTS (P1 and P2) Output High Voltage, VOH2 AVDD − 0.6 V min AVDD = 3 V, ISOURCE = 100 µA Output Low Voltage, VOL2 0.4 V max AVDD = 3 V, ISINK = 100 µA Output High Voltage, VOH2 4 V min AVDD = 5 V, ISOURCE = 200 µA Output Low Voltage, VOL2 0.4 V max AVDD = 5 V, ISINK = 800 µA INTERNAL CLOCK Frequency2 64 ± 3% kHz min/max LOGIC INPUTS CS2 Input Low Voltage, VINL 0.8 V max DVDD = 5 V Input High Voltage, VINH 0.4 2.0 V max V min DVDD = 3 V DVDD = 3 V or 5 V SCLK and DIN (Schmitt-Triggered Input)2 VT(+) 1.4/2 V min/max DVDD = 5 V VT(–) 0.8/1.7 V min/max DVDD = 5 V VT(+) – VT(–) 0.1/0.17 V min/max DVDD = 5 V VT(+) 0.9/2 V min/max DVDD = 3 V VT(–) 0.4/1.35 V min/max DVDD = 3 V VT(+) − VT(–) 0.06/0.13 V min/max DVDD = 3 V Input Currents ±10 µA max VIN = DVDD or GND Input Capacitance 10 pF typ All digital inputs LOGIC OUTPUTS Output High Voltage, VOH2 DVDD − 0.6 V min DVDD = 3 V, ISOURCE = 100 µA Output Low Voltage, VOL2 0.4 V max DVDD = 3 V, ISINK = 100 µA Output High Voltage, VOH2 4 V min DVDD = 5 V, ISOURCE = 200 µA Output Low Voltage, VOL2 0.4 V max DVDD = 5 V, ISINK = 1.6 mA Floating-State Leakage Current ±10 µA max Floating-State Output Capacitance 10 pF typ Data Output Coding Offset binary |
Nº de peça semelhante - AD7798 |
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Descrição semelhante - AD7798 |
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