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5962-89728022A 参数 Datasheet PDF下载

5962-89728022A图片预览
型号: 5962-89728022A
PDF下载: 下载PDF文件 查看货源
内容描述: [Multiple Output, High Precision, Dual Tracking Reference]
分类和应用:
文件页数/大小: 20 页 / 577 K
品牌: ADI [ ADI ]
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Data Sheet  
AD588  
NOISE PERFORMANCE AND REDUCTION  
The noise generated by the AD588 is typically less than 6 µV p-p  
over the 0.1 Hz to 10 Hz band. Noise in a 1 MHz bandwidth is  
approximately 600 µV p-p. The dominant source of this noise is  
the buried Zener, which contributes approximately 100 nV/√Hz. In  
comparison, the op amp’s contribution is negligible. Figure 7  
shows the 0.1 Hz to 10 Hz noise of a typical AD588.  
1µV  
If further noise reduction is desired, an optional capacitor, CN,  
can be added between the NOISE REDUCTION pin and  
ground, as shown in Figure 5.  
This forms a low-pass filter with the 4 kΩ RB on the output of  
the Zener cell. A 1 µF capacitor has a 3 dB point at 40 Hz and  
reduces the high frequency noise (to 1 MHz) to about  
200 µV p-p. Figure 8 shows the 1 MHz noise of a typical AD588  
both with and without a 1 µF capacitor.  
Figure 7. 0.1 Hz to 10 Hz Noise (0.1 Hz to 10 Hz BPF  
with Gain of 1000 Applied)  
C
= 1mF  
N
Note that a second capacitor is needed in order to implement  
the noise reduction feature when using the AD588 in the −10 V  
mode (Figure 6). The noise reduction capacitor is limited to  
0.1 µF maximum in this mode.  
NO C  
N
Figure 8. Effect of 1 µF Noise Reduction Capacitor on Broadband Noise  
Rev. M | Page 9 of 20