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AD7794 データシート(PDF) 7 Page - Analog Devices |
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AD7794 データシート(HTML) 7 Page - Analog Devices |
7 / 21 page Preliminary Technical Data AD7794 REV.PrE 6/04 | Page 7 Parameter AD7794B Unit Test Conditions/Comments EXCITATION CURRENT SOURCES (IEXC1 and IEXC2) Output Current 10/200/1000 µA nom Initial Tolerance at 25°C ±5 % typ Drift 200 ppm/°C typ Initial Current Matching at 25°C ±1 % typ Matching between IEXC1 and EXC2. VOUT = 0 V Drift Matching 20 ppm/°C typ Line Regulation (VDD) 2.1 ppm/V max AVDD = 5 V ± 5%. Typically 1.25 ppm/V Load Regulation 0.3 ppm/V typ Output Compliance AVDD – 0.6 V max Current Sources Programmed to 10 µA or 200 µA AVDD – 1 V max Current Sources Programmed to 1 mA GND – 30 mV V min BIAS VOLTAGE GENERATOR VBIAS AVDD/2 V nom VBIAS Generator Start-Up Time TBD ms/nF typ Dependent on the Capacitance connected to AIN TEMPERATURE SENSOR Accuracy TBD °C typ LOW SIDE POWER SWITCH RON 5 Ω max AVDD = 5 V 7 Ω max AVDD = 3 V Allowable Current 20 mA max Continuous Current DIGITAL OUTPUTS (P1 & 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 Floating-State Leakage Current ±1 µA max Floating-State Output Capacitance 10 pF typ INTERNAL/EXTERNAL CLOCK Internal Clock Fequency 64 ±2% 64 ±2% Duty Cycle 50:50 50:50 Drift 0.01 0.01 External Clock Frequency 64 64 Duty Cycle 45:55 45:55 LOGIC INPUTS All Inputs Except SCLK, DIN and CLK2 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 and DIN (Schmitt-Triggered Input)2 VT(+) 1.4/2 V min/V max DVDD = 5 V VT(–) 0.8/1.4 V min/V max DVDD = 5 V VT(+) – VT(–) 0.3/0.85 V min/V max DVDD = 5 V VT(+) 0.9/2 V min/V max DVDD = 3 V VT(–) 0.4/1.1 V min/V max DVDD = 3 V VT(+) - VT(–) 0.3/0.85 V min/V max DVDD = 3 V CLK2 VINL, Input Low Voltage 0.8 V max DVDD = 5 V VINL, Input Low Voltage 0.4 V max DVDD = 3 V VINH, Input High Voltage 3.5 V min DVDD = 5 V |
同様の部品番号 - AD7794 |
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同様の説明 - AD7794 |
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