전자부품 데이터시트 검색엔진 |
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AD7225 데이터시트(PDF) 8 Page - Analog Devices |
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AD7225 데이터시트(HTML) 8 Page - Analog Devices |
8 / 24 page AD7225 Rev. C | Page 8 of 24 TERMINOLOGY Total Unadjusted Error Total unadjusted error is a comprehensive specification that includes full-scale error, relative accuracy, and zero code error. Maximum output voltage is VREF − 1 LSB (ideal), where 1 LSB (ideal) is VREF/256. The LSB size varies over the VREF range. Therefore, the zero code error, relative to the LSB size, increases as VREF decreases. Accordingly, the total unadjusted error, which includes the zero code error, also varies in terms of LSB over the VREF range. As a result, total unadjusted error is specified for a fixed reference voltage of 10 V. Relative Accuracy Relative accuracy or endpoint nonlinearity is a measure of the maximum deviation from a straight line passing through the endpoints of the DAC transfer function. It is measured after allowing for zero code error and full-scale error and is normally expressed in LSB or as a percentage of full-scale reading. Differential Nonlinearity 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 over the operating temperature range ensures monotonicity. Digital Feedthrough Digital feedthrough is the glitch impulse transferred to the output of the DAC due to a change in its digital input code. It is specified in nV sec and is measured at VREF = 0 V. Digital Crosstalk Digital crosstalk is the glitch impulse transferred to the output of one converter (not addressed) due to a change in the digital input code to another addressed converter. It is specified in nV sec and is measured at VREF = 0 V. AC Feedthrough AC feedthrough is the proportion of reference input signal that appears at the output of a converter when that DAC is loaded with all 0s. Channel-to-Channel Isolation Channel-to-channel isolation is the proportion of input signal from the reference of one DAC (loaded with all 1s) that appears at the output of one of the other three DACs (loaded with all 0s) The figure given is the worst case for the three other outputs and is expressed as a ratio in dB. Full-Scale Error Full-scale error is defined as FSE = Measured Value − Zero Code Error − Ideal Value |
유사한 부품 번호 - AD7225_15 |
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유사한 설명 - AD7225_15 |
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