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ADC08034CIWM 데이터시트(PDF) 4 Page - National Semiconductor (TI) |
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ADC08034CIWM 데이터시트(HTML) 4 Page - National Semiconductor (TI) |
4 / 24 page Electrical Characteristics (Continued) The following specifications apply for V CC =VREF =+5 VDC, and fCLK = 1 MHz unless otherwise specified. Boldface limits apply for T A =TJ =TMIN to TMAX; all other limits TA =TJ = 25˚C. Symbol Parameter Conditions Typical Limits Units (Note 8) (Note 9) (Limits) DIGITAL AND DC CHARACTERISTICS I OUT TRI-STATE® Output Current V OUT =0V −3.0 µA (max) V OUT =5V 3.0 µA (max) I SOURCE Output Source Current V OUT =0V −6.5 mA (min) I SINK Output Sink Current V OUT =VCC 8.0 mA (min) I CC Supply Current ADC08031, ADC08034, CS = HIGH 3.0 mA (max) and ADC08038 ADC08032 (Note 16) 7.0 mA (max) REFERENCE CHARACTERISTICS V REFOUT Nominal Reference Output V REFOUT Option Available Only on 2.6 V ADC08034 and ADC08038 Electrical Characteristics The following specifications apply for V CC =VREF =+5 VDC, and tr =tf = 20 ns unless otherwise specified. Boldface limits apply for T A =TJ =TMIN to TMAX; all other limits TA =TJ = 25˚C. Symbol Parameter Conditions Typical Limits Units (Note 8) (Note 9) (Limits) f CLK Clock Frequency 10 kHz (min) 1 MHz (max) Clock Duty Cycle 40 % (min) (Note 14) 60 % (max) T C Conversion Time (Not Including f CLK = 1 MHz 8 1/f CLK (max) MUX Addressing Time) 8 µs (max) t CA Acquisition Time 1 ⁄2 1/f CLK(max) t SELECT CLK High while CS is High 50 ns t SET-UP CS Falling Edge or Data Input 25 ns (min) Valid to CLK Rising Edge t HOLD Data Input Valid after CLK 20 ns (min) Rising Edge t pd1,tpd0 CLK Falling Edge to Output C L = 100 pF: Data Valid (Note 15) Data MSB First 250 ns (max) Data LSB First 200 ns (max) t 1H,t0H TRI-STATE Delay from Rising Edge C L = 10 pF, RL =10 kΩ 50 ns of CS to Data Output and SARS Hi-Z (see TRI-STATE Test Circuits) C L = 100 pF, RL =2 kΩ 180 ns (max) C IN Capacitance of Logic Inputs 5 pF C OUT Capacitance of Logic Outputs 5 pF Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Note 2: Operating Ratings indicate conditions for which the device is functional. These ratings do not guarantee specific performance limits. For guaranteed speci- fications and test conditions, see the Electrical Characteristics. The guaranteed specifications apply only for the test conditions listed. Some performance character- istics may degrade when the device is not operated under the listed test conditions. Note 3: All voltages are measured with respect to AGND = DGND = 0 VDC, unless otherwise specified. Note 4: When the input voltage VIN at any pin exceeds the power supplies (VIN < (AGND or DGND) or VIN > VCC) the current at that pin should be limited to 5 mA. The 20 mA maximum package input current rating limits the number of pins that can safely exceed the power supplies with an input current of 5 mA to four pins. Note 5: The maximum power dissipation must be derated at elevated temperatures and is dictated by TJMAX, θJA and the ambient temperature, TA. The maximum allowable power dissipation at any temperature is PD =(TJMAX −TA)/θJA or the number given in the Absolute Maximum Ratings, whichever is lower. For these de- www.national.com 4 |
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