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DAC084S085EVAL Folha de dados(PDF) 6 Page - National Semiconductor (TI) |
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DAC084S085EVAL Folha de dados(HTML) 6 Page - National Semiconductor (TI) |
6 / 18 page A.C. and Timing Characteristics Values shown in this table are design targets and are subject to change before product release. The following specifica- tions apply for V A = +2.7V to +5.5V, VREFIN =VA,RL =2k Ω to GND, C L = 200 pF to GND, fSCLK = 30 MHz, input code range 3 to 252. Boldface limits apply for T MIN ≤ T A ≤ T MAX and all other limits are at TA = 25˚C, unless otherwise specified. Symbol Parameter Conductions Typical (Note 9) Limits (Note 9) Units (Limits) f SCLK SCLK Frequency 40 30 MHz (max) t s Output Voltage Settling Time (Note 10) 40h to C0h code change 3 4.5 µs (max) SR Output Slew Rate 1 V/µs Glitch Impulse Code change from 80h to 7Fh 12 nV-sec Digital Feedthrough 0.5 nV-sec Digital Crosstalk 1 nV-sec DAC-to-DAC Crosstalk 3 nV-sec Multiplying Bandwidth V REFIN = 2.5V ± 0.1Vpp 160 kHz Total Harmonic Distortion V REFIN = 2.5V ± 0.1Vpp input frequency = 10kHz 70 dB t WU Wake-Up Time V A = 3V 0.8 µsec V A = 5V 0.5 µsec 1/f SCLK SCLK Cycle Time 25 33 ns (min) t CH SCLK High time 7 10 ns (min) t CL SCLK Low Time 7 10 ns (min) t SS SYNC Set-up Time prior to SCLK Falling Edge 4 10 ns (min) t DS Data Set-Up Time prior to SCLK Falling Edge 1.5 3.5 ns (min) t DH Data Hold Time after SCLK Falling Edge 1.5 3.5 ns (min) t CFSR SCLK fall prior to rise of SYNC 0 3 ns (min) t SYNC SYNC High Time 6 10 ns (min) Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics. The guaranteed specifications apply only for the test conditions listed. Some performance characteristics may degrade when the device is not operated under the listed test conditions. Operation of the device beyond the maximum Operating Ratings is not recommended. Note 2: All voltages are measured with respect to GND = 0V, unless otherwise specified Note 3: When the input voltage at any pin exceeds 5.5V or is less than GND, the current at that pin should be limited to 10 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 10 mA to two. Note 4: The absolute maximum junction temperature (TJmax) for this device is 150˚C. The maximum allowable power dissipation is dictated by TJmax, the junction-to-ambient thermal resistance ( θJA), and the ambient temperature (TA), and can be calculated using the formula PDMAX = (TJmax − TA)/ θJA. The values for maximum power dissipation will be reached only when the device is operated in a severe fault condition (e.g., when input or output pins are driven beyond the operating ratings, or the power supply polarity is reversed). Note 5: Human body model is 100 pF capacitor discharged through a 1.5 k Ω resistor. Machine model is 220 pF discharged through ZERO Ohms. Note 6: See the section entitled "Surface Mount" found in any post 1986 National Semiconductor Linear Data Book for methods of soldering surface mount devices. Note 7: The inputs are protected as shown below. Input voltage magnitudes up to 5.5V, regardless of VA, will not cause errors in the conversion result. For example, if VA is 3V, the digital input pins can be driven with a 5V logic device. 20195404 Note 8: To guarantee accuracy, it is required that VA and VREFIN be well bypassed. Note 9: Typical figures are at TJ = 25˚C, and represent most likely parametric norms. Test limits are guaranteed to National’s AOQL (Average Outgoing Quality Level). Note 10: This parameter is guaranteed by design and/or characterization and is not tested in production. www.national.com 6 |
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