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AD9032 Arkusz danych(PDF) 4 Page - Analog Devices |
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AD9032 Arkusz danych(HTML) 4 Page - Analog Devices |
4 / 8 page AD9032 REV. 0 –4– DEFINITIONS OF SPECIFICATIONS Analog Bandwidth The analog input frequency at which the spectral power of the fundamental frequency (as determined by FFT analysis) is re- duced by 3 dB. Aperture Delay (tA) The delay between the rising edge of the ENCODE command and the instant at which the analog input is sampled. Aperture Uncertainty (Jitter) The sample-to-sample variation in aperture delay. Data Ready Delay (tDR) The delay between the 50% point of the change in output data and the 50% point of the rising edge of DATA READY. Differential Nonlinearity (DNL) The deviation of any code width from an ideal 1 LSB step, as determined by a histogram. Harmonic Distortion The rms value of the fundamental divided by the rms value of the worst harmonic. Integral Nonlinearity (INL) The deviation of the transfer function from a reference line mea- sured in fractions of 1 LSB using a “best straight line” deter- mined by a least square curve fit, as determined by a histogram. Output Delay (tOD) The delay between the 50% point of the rising edge of the ENCODE command and the 50% point of the next change in output data. Output Time Skew Bit-to-bit time variations among D0 to D11 outputs. Time skew includes HIGH-to-LOW and LOW-to-HIGH transitions of the digital output bits. Overvoltage Recovery Time The amount of time required for the converter to recover to 12-bit accuracy after an analog input signal 150% of full scale is reduced to the midscale of the converter. Power Supply Rejection Ratio The ratio of a change in power supply voltage which results in a change in input offset voltage. Pulse Width (High and Low) Rated performance of the ADC is assured when stated restric- tions on ENCODE pulse width shown in Specifications table are observed. Signal-to-Noise Ratio (SNR) The ratio of the rms signal amplitude to the rms value of “noise,” which is defined as the sum of all other spectral compo- nents, including harmonics but excluding dc, with an analog in- put signal 1 dB below full scale. Spurious Free Dynamic Range (SFDR) The rms value of the fundamental divided by the rms value of the highest spurious signal. This is generally specified as a func- tion of input signal level. Transient Response The time required for the converter to achieve 12-bit accuracy when a full-scale step function is applied to the analog input. Two-Tone Intermodulation Distortion (IMD) Rejection The ratio of the power of either of two input signals to the power of the strongest third-order IMD signal. N N + 1 N – 2 N – 1 ENCODE DATA OUTPUT N ANALOG IN T/H HOLD DATA READY TRACK t A t A = 3ns TYPICAL t OD t OD = 13ns TYPICAL t DR t DR = 7.5ns TYPICAL Timing Diagram OBSOLETE |
Podobny numer części - AD9032_15 |
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Podobny opis - AD9032_15 |
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