參數(shù)資料
型號(hào)： AD9410BSQ
廠商： ANALOG DEVICES INC
元件分類： ADC
英文描述： 10-Bit, 210 MSPS A/D Converter
中文描述： 1-CH 10-BIT FLASH METHOD ADC, PARALLEL ACCESS, PQFP80
封裝： POWER, HEAT SINK, PLASTIC, LQFP-80
文件頁(yè)數(shù)： 8/20頁(yè)
文件大?。?/td> 315K
代理商： AD9410BSQ
REV. 0
AD9410
–8–
DEFINITIONS OF SPECIFICATIONS
Analog Bandwidth
The analog input frequency at which the spectral power of the
fundamental frequency (as determined by the FFT analysis) is
reduced by 3 dB.
Aperture Delay
The delay between the 50% point of 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.
Differential Analog Input Resistance, Differential Analog
Input Capacitance, and Differential Analog Input Impedance
The real and complex impedances measured at each analog
input port. The resistance is measured statically and the capaci-
tance and differential input impedances are measured with a
network analyzer.
Differential Analog Input Voltage Range
The peak-to-peak differential voltage that must be applied to the
converter to generate a full-scale response. Peak differential voltage
is computed by observing the voltage on a single pin and subtract-
ing the voltage from the other pin, which is 180 degrees out of
phase. Peak-to-peak differential is computed by rotating the
inputs phase 180 degrees and taking the peak measurement
again. The difference is then computed between both peak
measurements.
Differential Nonlinearity
The deviation of any code width from an ideal 1 LSB step.
Effective Number of Bits
The effective number of bits (ENOB) is calculated from the
measured SINAD based on the equation.
ENOB
SINAD
dB
Full Scale Amplitude
Input Amplitude
MEASURED
=
+
–
.
1 76
log
.
20
6 02
Encode Pulsewidth/Duty Cycle
Pulsewidth high is the minimum amount of time that the
ENCODE pulse should be left in Logic 1 state to achieve
rated performance; pulsewidth low is the minimum time
ENCODE pulse should be left in low state. See timing implica-
tions of changing t
ENCH
in text. At a given clock rate, these specs
define an acceptable ENCODE duty cycle.
Full-Scale Input Power
Expressed in dBm. Computed using the following equation:
POWER
V
Z
0 001
.
FULL SCALE
FULL SCALE
INPUT
rms
=
10
2
log
Harmonic Distortion, Second
The ratio of the rms signal amplitude to the rms value of the
second harmonic component, reported in dBc.
Harmonic Distortion, Third
The ratio of the rms signal amplitude to the rms value of the
third harmonic component, reported in dBc.
Integral Nonlinearity
The deviation of the transfer function from a reference line
measured in fractions of 1 LSB using a
“
best straight line
”
determined by a least-square curve fit.
Minimum Conversion Rate
The encode rate at which the SNR of the lowest analog
signal frequency drops by no more than 3 dB below the
guaranteed limit.
Maximum Conversion Rate
The encode rate at which parametric testing is performed.
Output Propagation Delay
The delay between a differential crossing of ENCODE and
ENCODE
and the time when all output data bits are within
valid logic levels.
Out-of-Range Recovery Time
Out-of-range recovery time is the time it takes for the ADC to
reacquire the analog input after a transient from 10% above
positive full scale to 10% above negative full scale, or from 10%
below negative full scale to 10% below positive full scale.
Noise (For Any Range Within the ADC)
V
NOISE
FS
SIGNAL
10
dBm
dBFS
=
×
|Z
.001 10
Where
Z
is the input impedance,
FS
is the full scale of the device
for the frequency in question,
SNR
is the value for the particular
input level, and
SIGNAL
is the signal level within the ADC
reported in dB below full scale. This value includes both thermal
and quantization noise.
Power Supply Rejection Ratio
The ratio of a change in input offset voltage to a change in
power supply voltage.
Signal-to-Noise-and-Distortion (SINAD)
The ratio of the rms signal amplitude (set 0.5 dB below full
scale) to the rms value of the sum of all other spectral compo-
nents, including harmonics, but excluding dc.
Signal-to-Noise Ratio (Without Harmonics)
The ratio of the rms signal amplitude (set at 0.5 dB below full
scale) to the rms value of the sum of all other spectral compo-
nents, excluding the first five harmonics and dc.
Spurious-Free Dynamic Range (SFDR)
The ratio of the rms signal amplitude to the rms value of the
peak spurious spectral component. The peak spurious compo-
nent may or may not be a harmonic. May be reported in dBc
(i.e., degrades as signal level is lowered), or dBFS (always
related back to converter full scale).
Transient Response Time
Transient response time is defined as the time it takes for the
ADC to reacquire the analog input after a transient from 10%
above negative full scale to 10% below positive full scale.
Two-Tone Intermodulation Distortion Rejection
The ratio of the rms value of either input tone to the rms value
of the worst third order intermodulation product; reported in dBc.
Two-Tone SFDR
The ratio of the rms value of either input tone to the rms value
of the peak spurious component. The peak spurious component
may or may not be an IMD product. May be reported in dBc
(i.e., degrades as signal level is lowered), or in dBFS (always
related back to converter full scale).
Worst Other Spur
The ratio of the rms signal amplitude to the rms value of the
worst spurious component (excluding the second and third
harmonic) reported in dBc.
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