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參數(shù)資料
| 型號(hào)： | TDA7514 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | SINGLE-CHIP FM/AM TUNER WITH STEREO DECODER AND AUDIO PROCESSOR |
| 中文描述： | 單芯片F(xiàn)M /調(diào)幅調(diào)諧立體聲解碼器和音頻處理器 |
| 文件頁(yè)數(shù)： | 22/74頁(yè) |
| 文件大?。?/td> | 604K |
| 代理商： | TDA7514 |
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TDA7514
22/74
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
ATT
MAX/MIN
The maximum high cut attenuation can be selected via I
2
C [addr 8C, subaddr 23d, bits D2 to D1].
NOTES:
- The maximum high cut frequency setting can make the maximum attenuation lower than this. But then
you effectively have a fixed rolloff filter, because the max high cut frequency will keep the hcc filter
frequency from moving any higher, and the max high cut attenuation will keep the hcc filter frequency
from moving any lower.
- Also, there is an alternative way of setting the maximum high cut attenuation, but only if a maximum
high cut frequency does not need to be selected. The FAST3 can be set to limit the minimum high cut
frequency [addr 8C, subaddr 25d, bit D6], then any of the 32 high cut frequencies can be selected to
limit the max attenuation.
Max/Min high Cut
Attenuation(at 10kHz)@
HCC range 20kHz~4kHz
00
-1.8
dB
01
-4.4
dB
10
-6.2
dB
11
-7.0
dB
Max/Min high Cut
Attenuation(at 10kHz)@
HCC range 10kHz~2kHz
00
-5.6
dB
01
-9.3
dB
10
-11.5
dB
11
-12.4
dB
Fixed Rolloff
There are two ways to set the HCC filter to a fixed filter (there will be no
dynamic movement of the filter). Both of these will set the filter to the
corner frequency selected in the Max/Min High Cut Frequency [addr
8C, subaddr 25d, bits D4 to D0].
1) Set the FAST3 to Fixed High Cut ON [addr 8C, subaddr 25d, bit D7].
2) Turn High Cut OFF [addr 8C, subadress 23, bit D0] and Fix
Maximum High Cut Frequency [addr 8C, subaddr 25d, bit D6]
Table 8. Quality Actuators (continued)
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