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AD5570ARS-REEL 数据表(PDF) 10 Page - Analog Devices |
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AD5570ARS-REEL 数据表(HTML) 10 Page - Analog Devices |
10 / 24 page AD5570 Rev. 0 | Page 10 of 24 TERMINOLOGY Relative Accuracy or Integral Nonlinearity (INL) Relative accuracy or integral nonlinearity is a measure of the maximum deviation, in LSBs, from a straight line passing through the endpoints of the DAC transfer function. Monotonicity A DAC is monotonic, if the output either increases or remains constant for increasing digital inputs. The AD5570 is monotonic over its full operating temperature range. Differential Nonlinearity (DNL) Differential nonlinearity is the difference between the measured change and the ideal 1 LSB change between any two adjacent codes. A specified differential nonlinearity of ±1 LSB maximum ensures monotonicity. Gain Error Gain error is the difference between the actual and ideal analog output range, expressed as a percent of the full-scale range. It is the deviation in slope of the DAC transfer characteristic from the ideal. Gain Error Temperature Coefficient Gain error temperature coefficient is a measure of the change in gain error with changes in temperature. It is expressed in ppm/°C. Negative Full-Scale Error / Zero Scale Error Negative full-scale error is the error in the DAC output voltage when all 0s are loaded into the DAC latch. Ideally, the output voltage, with all 0s in the DAC latch, should be −2 VREF. Full-Scale Error Full-scale error is the error in the DAC output voltage when all 1s are loaded to the DAC latch. Ideally the output voltage, with all 1s loaded into the DAC latch, should be 2 VREF − 1 LSB. Bipolar Zero Error Bipolar zero error is the deviation of the analog input from the ideal half-scale output of 0.0000 V when the inputs are loaded with 0x8000. Output Voltage Settling Time Output voltage settling time is the amount of time it takes for the output to settle to a specified level for a full-scale input change. Slew Rate The slew rate of a device is a limitation in the rate of change of output voltage. The output slewing speed of a voltage-output D/A converter is usually limited by the slew rate of the amplifier used at its output. Slew rate is measured from 10% to 90% of the output signal and is given in V/µs. Digital-to-Analog Glitch Impulse Digital-to-analog glitch impulse is the amount of charge in- jected into the analog output when the input codes in the DAC register change state. It is specified as the area of the glitch in nV-s and is measured when the digital input code changes by 1 LSB at the major carry transition, that is, from code 0x7FFF to 0x8000. Bandwidth The reference amplifiers within the DAC have a finite band- width to optimize noise performance. To measure it, a sine wave is applied to the reference input (REFIN), with full-scale code loaded to the DAC. The bandwidth is the frequency at which the output amplitude falls to 3 dB below the input. Digital Feedthrough Digital feedthrough is a measure of the impulse injected into the analog output of the DAC from the digital inputs of the DAC, but is measured when the DAC output is not updated. SYNC is held high, while the CLK and SDIN signals are toggled. It is specified in nV-s and is measured with a full-scale code change on the data bus, that is, from all 0s to all 1s and vice versa. Power Supply Sensitivity Power supply sensitivity indicates how the output of the DAC is affected by changes in the power supply voltage. |
类似零件编号 - AD5570ARS-REEL |
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类似说明 - AD5570ARS-REEL |
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