参数资料
型号: AD9992BBCZ
厂商: Analog Devices Inc
文件页数: 5/92页
文件大小: 0K
描述: IC CCD SGNL PROC 12BIT 105CSPBGA
产品变化通告: AD9992 Discontinuation 22/Feb/2012
标准包装: 1
类型: CCD 信号处理器,12 位
输入类型: 逻辑
输出类型: 逻辑
接口: 3 线串口
电流 - 电源: 27mA
安装类型: 表面贴装
封装/外壳: 105-LFBGA,CSPBGA
供应商设备封装: 105-CSPBGA(8x8)
包装: 托盘
AD9992
Rev. C | Page 13 of 92
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 AD9992 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 amplified
to fill the full-scale range of the ADC.
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 con-
verted 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 AD9992, 1 LSB
is 0.488 mV.
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
data outputs for a given step change in the supply voltage.
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