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AD7794BRU 데이터시트(PDF) 6 Page - Analog Devices |
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AD7794BRU 데이터시트(HTML) 6 Page - Analog Devices |
6 / 36 page AD7794/AD7795 Rev. D | Page 6 of 36 Parameter1 AD7794/AD7795 Unit Test Conditions/Comments BIAS VOLTAGE GENERATOR VBIAS AVDD/2 V nom VBIAS Generator Start-Up Time ms/nF typ Dependent on the capacitance connected to AIN; See Figure 11 TEMPERATURE SENSOR Accuracy ±2 °C typ Applies if user calibrates the temperature sensor Sensitivity 0.81 mV/°C typ 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) VOH, Output High Voltage2 AVDD − 0.6 V min AVDD = 3 V, ISOURCE = 100 μA VOL, Output Low Voltage2 0.4 V max AVDD = 3 V, ISINK = 100 μA VOH, Output High Voltage2 4 V min AVDD = 5 V, ISOURCE = 200 μA VOL, Output Low Voltage2 0.4 V max AVDD = 5 V, ISINK = 800 μA INTERNAL/EXTERNAL CLOCK Internal Clock Frequency2 64 ± 3% kHz min/max Duty Cycle 50:50 % typ External Clock Frequency 64 kHz nom A 128 kHz external clock can be used if the divide-by-2 function is used (Bit CLK1 = CLK0 = 1) Duty Cycle 45:55 to 55:45 % typ Applies for external 64 kHz clock, a 128 kHz clock can have a less stringent duty cycle LOGIC INPUTS CS2 VINL, Input Low Voltage 0.8 V max DVDD = 5 V 0.4 V max DVDD = 3 V VINH, Input High Voltage 2.0 V min DVDD = 3 V or 5 V SCLK (Schmitt-Triggered Input), CLK, and DIN2 AD7794B/AD7795B VT(+) 1.4/2 V min/max DVDD = 5 V VT(−) 0.8/1.7 V min/max DVDD = 5 V VT(+) to 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(+) to VT(−) 0.06/0.13 V min/max DVDD = 3 V AD7794C VT(+) 1.35/2.05 V min/max DVDD = 5 V VT(−) 0.8/1.9 V min/max DVDD = 5 V VT(+) to VT(−) 0.1/0.19 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(+) to VT(−) 0.06/0.15 V min/max DVDD = 3 V Input Currents ±10 μA max VIN = DVDD or GND Input Capacitance 10 pF typ All digital inputs |
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