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| 型号： | TDA7406T |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP44 |
| 封装： | 10 X 10 MM, TQFP-44 |
| 文件页数： | 9/49页 |
| 文件大小： | 830K |
| 代理商： | TDA7406T |
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TDA7406T
2.8 Spectrum analyzer
A fully integrated seven band spectrum analyzer with programmable quality factor is present in the IC (Figure
13).
The spectrum analyzer consists of seven band pass filters with a rectifier and sample capacitor which stores the
maximum peak signal level since the last read cycle. This peak signal level can be read by a microprocessor at
the SAout pin. To allow easy interfacing to a microprocessor analog port, the output voltage at this pin is referred
to device ground.
The microprocessor starts a read cycle when there is a clock edge going negative at the SA clk input. On the
following positive clock edges, the peak signal level for the band pass filters is subsequently switched to SAout.
Each analog output data is valid after the time tSAdel.
A reset of the sample capacitors is induced whenever SAclk remains high for the time tintres. Note that a proper
reset requires the clock signal SAclk to be held at high potential. Figure 13 shows the block diagram and Figure
14 illustrates the read cycle timing of the spectrum analyzer.
The spectrum analyzer minimum repeat time is 50ms.
2.8.1 Spectrum Analyzer Filters
Each filter is realized as a switched capacitor with a 2nd order frequency response. The center frequency of the
filter stages are: 62,157, 396, 1K, 2.51K, 6.34k and 16kHz. It is possible to choose between two different filter
quality factors: 1.8 and 3.5.
Figure 13. Spectrum analyzer block diagram
Figure 14. Timing spectrum analyzer
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相关代理商/技术参数 |
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| TDA7406TR | 功能描述:音频 DSP INFOTAINMENT SIGNAL RoHS:否 制造商:Texas Instruments 工作电源电压: 电源电流: 工作温度范围: 安装风格: 封装 / 箱体: 封装:Tube |
| TDA7407 | 功能描述:音频 DSP Advanced car signal processor RoHS:否 制造商:Texas Instruments 工作电源电压: 电源电流: 工作温度范围: 安装风格: 封装 / 箱体: 封装:Tube |
| TDA7407_07 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Advanced car signal processor |
| TDA7407D | 功能描述:音频 DSP INFOTAINMENT SIGNAL RoHS:否 制造商:Texas Instruments 工作电源电压: 电源电流: 工作温度范围: 安装风格: 封装 / 箱体: 封装:Tube |
| TDA7407DTR | 功能描述:IC PROCESSOR ADV SIGNAL 44-LQFP RoHS:是 类别:集成电路 (IC) >> 线性 - 音频处理 系列:- 其它有关文件:STA321 View All Specifications 标准包装:1 系列:Sound Terminal™ 类型:音频处理器 应用:数字音频 安装类型:表面贴装 封装/外壳:64-LQFP 裸露焊盘 供应商设备封装:64-LQFP EP（10x10） 包装:Digi-Reel® 其它名称:497-11050-6 |
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