参数资料
型号: LM98640W-MLS
厂商: NATIONAL SEMICONDUCTOR CORP
元件分类: 模拟信号调理
英文描述: SPECIALTY ANALOG CIRCUIT, CQFP68
封装: CERAMIC, QFP-68
文件页数: 17/50页
文件大小: 1688K
代理商: LM98640W-MLS
Input Bias and Clamping
The inputs to the LM98640QML are typically AC coupled and
can be sampled in either Sample and Hold Mode (S/H Mode)
or Correlated Double Sampling Mode (CDS Mode). The cir-
cuit of Figure 7 shows the input structure of the
LM98640QML. The DC bias point for the LM98640QML side
of the AC coupling capacitor can to be set using an external
DC bias resistor network, by using the CLPIN configuration,
or by using the BITCLP configuration. A typical CCD wave-
form is shown in Figure 8. Also shown in Figure 8 is an internal
signal “CLAMP” which can be used to “gate” the CLPIN signal
so that it only occurs during the “pedestal” portion of the CCD
pixel waveform.
30064708
FIGURE 7. Input Structure Diagram
www.national.com
24
LM98640QML
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