Electronic Components Datasheet Search |
|
ADC12L080EVAL Datasheet(PDF) 9 Page - National Semiconductor (TI) |
|
|
ADC12L080EVAL Datasheet(HTML) 9 Page - National Semiconductor (TI) |
9 / 23 page Specification Definitions APERTURE DELAY is the time after the rising edge of the clock to when the input signal is acquired or held for conver- sion. APERTURE JITTER (APERTURE UNCERTAINTY) is the variation in aperture delay from sample to sample. Aperture jitter manifests itself as noise in the output. COMMON MODE VOLTAGE (V CM) is the d.c. potential present at both signal inputs to the ADC. CONVERSION LATENCY See PIPELINE DELAY. DIFFERENTIAL NON-LINEARITY (DNL) is the measure of the maximum deviation from the ideal step size of 1 LSB. DUTY CYCLE is the ratio of the time that a repetitive digital waveform is high to the total time of one period. The speci- fication here refers to the ADC clock input signal. EFFECTIVE NUMBER OF BITS (ENOB, or EFFECTIVE BITS) is another method of specifying Signal-to-Noise and Distortion or SINAD. ENOB is defined as (SINAD - 1.76) / 6.02 and says that the converter is equivalent to a perfect ADC of this (ENOB) number of bits. FULL POWER BANDWIDTH is a measure of the frequency at which the reconstructed output fundamental drops 3 dB below its low frequency value for a full scale input. GAIN ERROR is the deviation from the ideal slope of the transfer function. It can be calculated as: Gain Error = Positive Full Scale Error − Offset Error INTEGRAL NON LINEARITY (INL) is a measure of the deviation of each individual code from a best fit straight line. The deviation of any given code from this straight line is measured from the center of that code value. INTERMODULATION DISTORTION (IMD) is the creation of additional spectral components as a result of two sinusoidal frequencies being applied to the ADC input at the same time. It is defined as the ratio of the power in the second and third order intermodulation products to the power in one of the original frequencies. IMD is usually expressed in dBFS. MISSING CODES are those output codes that will never appear at the ADC outputs. The ADC12L080 is guaranteed not to have any missing codes. NEGATIVE FULL SCALE ERROR is the difference between the input voltage (V IN+−VIN−) just causing a transition from negative full scale to the first code and its ideal value of 0/5 LSB. OFFSET ERROR is the input voltage that will cause a tran- sition from a code of 01 1111 1111 to a code of 10 0000 0000/ OUTPUT DELAY is the time delay after the rising edge of the clock before the data update is presented at the output pins. PIPELINE DELAY (LATENCY) is the number of clock cycles between initiation of conversion and when that data is pre- sented to the output driver stage. Data for any given sample is available at the output pins the Pipeline Delay plus the Output Delay after the sample is taken. New data is available at every clock cycle, but the data lags the conversion by the pipeline delay. POSITIVE FULL SCALE ERROR is the difference between the actual last code transition and its ideal value of 11⁄2 LSB below positive full scale. POWER SUPPLY REJECTION RATIO (PSRR) is a mea- sure of how well the ADC rejects a change in the power supply voltage. PSRR1 is the ratio of the change in Full- Scale Gain Error that results from a change in the d.c. power supply voltage, expressed in dB. PSRR2 is a measure of how well an a.c. signal riding upon the power supply is rejected at the output. SIGNAL TO NOISE RATIO (SNR) is the ratio, expressed in dB, of the rms value of the input signal to the rms value of the sum of all other spectral components below one-half the sampling frequency, not including harmonics or d.c. SIGNAL TO NOISE PLUS DISTORTION (S/N+D or SINAD) Is the ratio, expressed in dB, of the rms value of the input signal to the rms value of all of the other spectral compo- nents below half the clock frequency, including harmonics but excluding d.c. SPURIOUS FREE DYNAMIC RANGE (SFDR) is the differ- ence, expressed in dB, between the rms values of the input signal and the peak spurious signal, where a spurious signal is any signal present in the output spectrum that is not present at the input. TOTAL HARMONIC DISTORTION (THD) is the ratio, ex- pressed in dBc, of the rms total of the first nine harmonic levels at the output to the level of the fundamental at the output. THD is calculated as where A f1 is the RMS power of the fundamental (output) frequency and A f2 through Af10 are the RMS power in the first 9 harmonic frequencies. Second Harmonic Distortion (2nd Harm) is the difference expressed in dB, between the RMS power in the input frequency at the output and the power in its 2nd harmonic level at the output. Third Harmonic Distortion (3rd Harm) is the difference, expressed in dB, between the RMS power in the input frequency at the output and the power in its 3rd harmonic level at the output. www.national.com 9 |
Similar Part No. - ADC12L080EVAL |
|
Similar Description - ADC12L080EVAL |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.NET |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |