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| SN54LS197J资料 | |
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SN54LS197J PDF Download |
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File Size : 105 KB
Manufacturer:TI Description:The AGC dynamically adjusts the gain of the preamplifier to compensate for the wide range of microphone input levels. The AGC allows the full range of whispers to loud sounds to be recorded with minimal distortion. The attack time is deter- mined by the time constant of a 5 KΩ internal resistance and an external capacitor (C2) con- nected from the AGC pin to VSSA analog ground. The release time is determined by the time con- stant of an external resistor (R2) and an external capacitor (C2 on the schematic on page 1-17) connected in parallel between the AGC Pin and VSSA analog ground. Nominal values of 470 KΩ and 4.7 µF give satisfactory results, in most cases. For AGC voltages of 1.5V and below, the pream- plifier is at its maximum gain of 24 dB. Reduction in preamplifier gain occurs for voltages of approx- imately 1.8V. |
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| 1PCS | 100PCS | 1K | 10K | ||
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型 号：SN54LS197J 厂 家：TI 封 装：0411+ 批 号：261 数 量： 说 明： |
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运 费： 所在地： 新旧程度： |
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| 联系人：张小姐、 颜先生13661569158 |
| 电 话：400-878-9158,021-54286636 |
| 手 机：13661569158 |
| QQ：12230627,596815151,531081618 |
| MSN： |
| 传 真：021-54286636 |
| EMail：susumu@susumu.com.cn |
| 公司地址： 上海市古楼公路348弄25号 |
建议使用分辨率:1024*768