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參數(shù)資料
| 型號： | TDA7340G013TR |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 音頻控制 |
| 英文描述： | 2 CHANNEL(S), TONE CONTROL CIRCUIT, PQFP44 |
| 封裝： | 10 X 10 MM, PLASTIC, QFP-44 |
| 文件頁數(shù)： | 11/28頁 |
| 文件大?。?/td> | 376K |
| 代理商： | TDA7340G013TR |
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VPEAK
(V)
D95AU332A
20
DEVIATION(KHz)
0.9
1.3
2.3
3.2
DETECTOR OFF (11)
32.5
45
75
OVM=10
OVM=01
OVM=00
Figure 7: Behaviour of the Deviation Dependent Threshold Adiust (Over Deviation Detector)
2.2V(00)
TRIG. THRESHOLD
0.9V
VPEAK
E'
D95AU333A
1.8V(01)
1.2V(10)
MONO
STEREO
noisy signal
good signal
ATC_SB OFF (11)
NOISE
≈3V
Figure 6: Behaviour of the Field Strength Controlled Threshold Adjustment
MUTE & PAUSE FEATURES
The TDA7340G provides three types of mute,
controlled via I2C bus (see pag.12, MUTE BYTE
register).
SOFT MUTE
Bit D0=1
→ Soft Mute ON
Bit D0=0
→Soft Mute OFF
It allows an automatic soft muting and unmuting
of the signal.
The time constant is fixed by an external capaci-
tor Csm inserted between pin Csm and ground.
Once fixed the external capacitor, two different
slopes (time constant) are selectable by program-
mation of bit D1.
Bit D1=1
→ fast slope (I=Imax)
Bit D1=0
→ slow slope (I=Imin)
The soft mute generates a gradual signal de-
creasing avoiding big click noise of an immediate
high attenuation, without necessity to program a
sequence of decreasing volume levels. A re-
sponse example is reported in Fig.12 (mute) and
Fig.13 (unmute). The final attenuation obtained
with soft mute ON is 60dB typical.
The used reference parameter is the delay time
taken to reach 20dB attenuation (no matter what
the signal level is).
Using a capacitor Csm=22nF this delay is:
d = 1. 8ms when selected Fast slope mode (bit D1=1)
d = 25 ms when selected Slow slope mode (bit D1=0)
TDA7340G
19/27
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| TDA7340S | 2 CHANNEL(S), TONE CONTROL CIRCUIT, PDIP42 |
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| TDA7342 | 2 CHANNEL(S), TONE CONTROL CIRCUIT, PQFP32 |
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TDA7340P | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:AUDIO SIGNAL PROCESSOR |
| TDA7340S | 功能描述:音頻 DSP Audio Signal Proc RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風格: 封裝 / 箱體: 封裝:Tube |
| TDA7342 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Digitally controlled audio processor |
| TDA7342_06 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Digitally controlled audio processor |
| TDA7342EQ2N | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Digitally controlled audio processor |
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