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AD5024 Fiches technique(PDF) 14 Page - Analog Devices

 No de pièce AD5024 Description 2.7 V to 5.5 V, Serial-Input, Voltage-Output, 12-/16-Bit DAC Download 24 Pages Scroll/Zoom 100% Fabricant AD [Analog Devices] Site Internet http://www.analog.com Logo

AD5024 Fiches technique(HTML) 14 Page - Analog Devices

 14 / 24 pageAD5512A/AD5542ARev. A | Page 14 of 24TERMINOLOGYRelative Accuracy or Integral Nonlinearity (INL)For the DAC, relative accuracy or INL is a measure of themaximum deviation, in LSBs, from a straight line passingthrough the endpoints of the DAC transfer function. A typicalINL vs. code plot is shown in Figure 7.Differential Nonlinearity (DNL)DNL is the difference between the measured change and theideal 1 LSB change between any two adjacent codes. A specifieddifferential nonlinearity of ±1 LSB maximum ensures mono-tonicity. A typical DNL vs. code plot is shown in Figure 10.Gain ErrorGain error is the difference between the actual and ideal analogoutput range, expressed as a percent of the full-scale range.It is the deviation in slope of the DAC transfer characteristicfrom ideal.Gain Error Temperature CoefficientGain error temperature coefficient is a measure of the changein gain error with changes in temperature. It is expressed inppm/°C.Zero-Code ErrorZero-code error is a measure of the output error when zerocode is loaded to the DAC register.Zero-Code Temperature CoefficientThis is a measure of the change in zero-code error with achange in temperature. It is expressed in mV/°C.Digital-to-Analog Glitch ImpulseDigital-to-analog glitch impulse is the impulse injected into theanalog output when the input code in the DAC register changesstate. It is normally specified as the area of the glitch in nV-secand is measured when the digital input code is changed by1 LSB at the major carry transition. A digital-to-analog glitchimpulse plot is shown in Figure 20.Digital FeedthroughDigital feedthrough is a measure of the impulse injected intothe analog output of the DAC from the digital inputs of theDAC, but it is measured when the DAC output is not updated.CSPower Supply Rejection Ratio (PSRR)is held high while the SCLK and DIN signals are toggled. Itis specified in nV-sec and is measured with a full-scale codechange on the data bus, that is, from all 0s to all 1s and viceversa. A typical digital feedthrough plot is shown in Figure 19.PSRR indicates how the output of the DAC is affected by changesin the power supply voltage. The power supply rejection ratio isquoted in terms of percent change in output per percent changein VDD for full-scale output of the DAC. VDD is varied by ±10%.Reference FeedthroughReference feedthrough is a measure of the feedthrough from theVREF input to the DAC output when the DAC is loaded with all 0s.A 100 kHz, 1 V p-p is applied to VREF. Reference feedthrough isexpressed in mV p-p.

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