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參數(shù)資料
| 型號(hào)： | TDA7406T |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP44 |
| 封裝： | 10 X 10 MM, TQFP-44 |
| 文件頁數(shù)： | 5/49頁 |
| 文件大小： | 830K |
| 代理商： | TDA7406T |
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TDA7406T
2.5 Volume Control
2.5.1 Gain/Attenuation Control
The volume control can range from a gain of 32dB up to an attenuation of 79dB; however it is not recommended
to use a gain higher than 20dB for performance reasons.
2.5.2 Soft Step Volume
When the speaker-level is changed, audible clicks could appear at the output. The root cause of those clicks
could either be a DC offset before the speaker-stage or the sudden change of the envelope of the audio signal.
With the SoftStep-feature both kinds of clicks could be reduced to a minimum and are no more audible. The
blend-time from one step to the next is programmable with four different values: 320
s, 1.28ms, 5.12ms and
20.4ms.
Figure 6. SoftStep-Timing for Volume
Note: For steps more than 0.5dB (Volume) or 1dB (Speaker) the SoftStep mode should be deactivated because it could generate a hard 1dB
step during blending.
2.6 The Seven Band Equalizer
2.6.1 Equalizer Filter
Each filter is realized as a switched capacitor with a 2nd order frequency response.
There are three parameters programmable in the equalizer filter:
s
Attenuation: ±15dB in 1db step resolution (Figure 7 shows the boost and cut response as a function
of frequency at a center frequency of 1kHz.)
s
Center Frequency: This parameter is programmable in the filter stages 1(62/100Hz), 6(4/6.34kHz) and
7(15/16kHz). The others bands are fixed at: 157, 396, 1K and 2.5K Hertz (see Figure 8).
s
Quality Factors: The four possible quality factors are 1, 1.4, 1.8 and 2.2 (see Figure 9).
The center frequency, Q, DC-mode and boost/cut can be set fully independently for each filter. Figure 10 shows
the superposition of all equalizer filter curves for different quality factors.
1dB
0.5dB
-0.5dB
-1dB
SS Time
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相關(guān)代理商/技術(shù)參數(shù) |
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| TDA7406TR | 功能描述:音頻 DSP INFOTAINMENT SIGNAL RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風(fēng)格: 封裝 / 箱體: 封裝:Tube |
| TDA7407 | 功能描述:音頻 DSP Advanced car signal processor RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風(fēng)格: 封裝 / 箱體: 封裝:Tube |
| TDA7407_07 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Advanced car signal processor |
| TDA7407D | 功能描述:音頻 DSP INFOTAINMENT SIGNAL RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風(fēng)格: 封裝 / 箱體: 封裝:Tube |
| TDA7407DTR | 功能描述:IC PROCESSOR ADV SIGNAL 44-LQFP RoHS:是 類別:集成電路 (IC) >> 線性 - 音頻處理 系列:- 其它有關(guān)文件:STA321 View All Specifications 標(biāo)準(zhǔn)包裝:1 系列:Sound Terminal™ 類型:音頻處理器 應(yīng)用:數(shù)字音頻 安裝類型:表面貼裝 封裝/外殼:64-LQFP 裸露焊盤 供應(yīng)商設(shè)備封裝:64-LQFP EP（10x10） 包裝:Digi-Reel® 其它名稱:497-11050-6 |
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