参数资料
| 型号： | AD9942BBCZRL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 3/36页 |
| 文件大小： | 0K |
| 描述： | IC PROCESSOR SGNL 14B 100CSPBGA |
| 标准包装： | 2,000 |
| 类型： | CCD 信号处理器，14 位 |
| 应用： | 数码相机 |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 100-LFBGA，CSPBGA |
| 供应商设备封装： | 100-CSBGA（9x9） |
| 包装： | 带卷 (TR) |
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AD9942
Rev. A | Page 11 of 36
TERMINOLOGY
Differential Nonlinearity (DNL)
An ideal ADC exhibits code transitions that are exactly 1 LSB
apart. DNL is the deviation from this ideal value. Therefore,
every code must have a finite width. No missing codes
guaranteed to 12-bit resolution indicates that all 4096 codes
must be present over all operating conditions.
Peak Nonlinearity
Peak nonlinearity, a full signal chain specification, refers to the
peak deviation of the output of the AD9942 from a true straight
line. The point used as zero scale occurs 0.5 LSB before the first
code transition. Positive full scale is defined as a level 1 LSB
and 0.5 LSB beyond the last code transition. The deviation is
measured from the middle of each particular output code to the
true straight line. The error is then expressed as a percentage
of the 2 V ADC full-scale signal. The input signal is always
appropriately gained up to fill the ADC’s full-scale range.
Total Output Noise
The rms output noise is measured using histogram techniques.
The standard deviation of the ADC output codes is calculated
in LSB and represents the rms noise level of the total signal
chain at the specified gain setting. The output noise can be
converted to an equivalent voltage, using the relationship
1 LSB = (ADC full scale/2n codes)
where n is the bit resolution of the ADC. For the AD9942,
1 LSB is approximately 122.0 μV.
Power Supply Rejection (PSR)
The PSR is measured with a step change applied to the supply
pins. The PSR specification is calculated from the change in the
data outputs for a given step change in the supply voltage.
Matching Error
The matching error refers to the Channel A to Channel B
mismatch after post-ADC correction calibration has been
applied to remove gain error between Channel A and
Channel B.
Crosstalk
The crosstalk is measured while applying a full-scale step to
one channel and measuring the interference on the opposite
channel.
×
=
384
,
16
)
(
log
20
)
dB
(
LSB
ce
Interferen
Crosstalk
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