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发表于 2024-2-23 16:27:13
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本帖最后由 jforu 于 2024-2-23 16:36 编辑
对于7106(7107),积分电容值附近的选择, CBB是便宜,又好用的选择, CG0,在这个容量附近比CBB贵. CBB比CL要好一点.
(对于7106(7107)常用的积分电容,一般不小于100nF)
Integrating Capacitor
The integrating capacitor should be selected to give the maximum voltage swing that ensures tolerance buildup
will not saturate the integrator swing(approximately. 0.3V from either supply).In the UTC 7106, when the analog
COMMON is used as a reference, a nominal+2V fullscale integrator swing is fine. For three readings/second (48kHz
clock) nominal values for CINT are 0.22μF and 0.10μF, respectively. Of course, if different oscillator frequencies are
used, these values should be changed in inverse proportion to maintain the same output swing.
An additional requirement of the integrating capacitor is that it must have a low dielectric absorptiont to prevent
roll-over errors. While other types of capacitors are adequate for this application, polypropylene capacitors give
undetectable errors at reasonable cost.
polypropylene capacitors:聚丙烯电容器 |
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