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参数资料
| 型号： | ADC10030 |
| 厂商： | National Semiconductor Corporation |
| 英文描述： | 10-Bit, 30 MSPS, 125 mW A/D Converter with Internal Sample and Hold |
| 中文描述： | 10位，30 MSPS的，125毫瓦的A / D内部采样与保持器 |
| 文件页数： | 10/17页 |
| 文件大小： | 417K |
| 代理商： | ADC10030 |
Specification Definitions
(Continued)
positive full scale (1
1
2
LSB above the last code transition).
The deviation of any given code from this straight line is
measured from the center of that code value.
OUTPUT DELAY
is the time delay after the fall of the input
clock before the data update is present at the output pins.
OUTPUT HOLD TIME
is the length of time that the output
data is valid after the fall of the input clock.
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 by the Pipeline Delay plus the Output Delay after
that sample is taken. New data is available at every clock
cycle, but the data lags the conversion by the Pipeline Delay
plus the Output Delay.
PSRR (POWER SUPPLY REJECTION RATIO)
is the ratio
of the change in dc power supply voltage to the resulting
change in Full Scale Error, expressed in dB.
SAMPLING (APERTURE) DELAY or APERTURE TIME
is
that time required after the fall of the clock input for the sam-
pling switch to open. The sample is effectively taken this
amount of time after the fall of the clock input.
Timing Diagram
SIGNAL TO NOISE RATIO (SNR)
is the ratio, expressed in
dB, of the RMS value of the input signal to the RMS value of
other spectral components below half the clock frequency,
not including harmonics or dc.
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 com-
ponents below half the clock frequency, including harmonics
but excluding dc.
SPURIOUS FREE DYNAMIC RANGE (SFDR)
is the differ-
ence, expressed in dB or dBc, between the RMS value 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 dB, of the RMS total of the first six harmonic com-
ponents, to the RMS value of the input signal.
ZERO SCALE OFFSET ERROR
is the difference between
the ideal input voltage (
1
2
LSB) and the actual input voltage
that just causes a transition from an output code of zero to
an output code of one.
DS101064-15
FIGURE 1. ADC10030 Timing Diagram
A
www.national.com
10
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