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參數(shù)資料
| 型號(hào)： | TDA7317 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | Five Bands Digital Controlled Graphic Equalizer(五波段數(shù)控立體圖形均衡器) |
| 中文描述： | 五級(jí)數(shù)控圖形均衡器（五波段數(shù)控立體圖形均衡器） |
| 文件頁數(shù)： | 4/12頁 |
| 文件大小： | 233K |
| 代理商： | TDA7317 |
DEVICEDESCRIPTION
The TDA7317 is a five bands, digitally controlled
stereoGraphic Equalizer.
The device is intended for high quality audio ap-
plication in Hi-Fi, TV and car radio systems where
feature like low noise and THD are key factors. A
mixedBipolar Cmos Technologyallows:
Cmos analog switches for pop free commuta-
tions, high frequency op.amp. (GWB = 10MHz)
and high linearity polisilicon resistor for THD =
0.01 (at Vin = 1Vrms) anda S/Nratio of 102dB.
The internal Block Diagram is shown on page 1.
The first stage is a volume control. The control
rangeis 0 to -17.625dBwith 0.375dBstep.
The very high resolution (0.375dB step) allows
the implementation of closed loop amplitude con-
trol system completely free from any acustical ef-
fect (stepping variation and pumpingeffect).
The volume control is followed by a serial five
bands equalizer. Each filtering cell is the biquad
cell shown in fig. 1
The internal resistor string is fixing the boost/cut
value while the buffer makes the Q (quality factor)
and central frequency, set by external compo-
nents, fully indipendentfrom the internal resistors.
Each filtering cell is realizedusing only 4 external
components (2 capacitors and 2 resistors) allow-
ing a flexible selection of centre frequency fo, Q
factor and gain. Here below the basic formulae
and the key features of each band pass filter are
reported:
f
o
= center frequency
Gv = gain/loss at the center frequency f
o
Gv = 20log(Av)
Q
=
f
o
f
2
f
1
where f
2
, f
1
= 3dB Bandwidthlimits.
A
v
=(
R2
C2
) + (
R2
C1
) + (
R1
C1
)
(
R2
C1
) + (
R2
C2
)
Q
=
√
(
R2
C1
) + (
R2
C2
)
(
R1
C1
R2
C2
)
f
o
=
1
2
π
√
(
R1
R2
C1
)
If C1 is fixed, then:
C2
=
Q
2
A
v
1
Q
2
C1
R2
=
1
2
π
C1
f
o
(
A
v
1
)
Q
(
A
v
1
Q
2
)
R1
=
(
A
v
1
)
2
A
v
1
Q
2
R2
Likewise, the components’values can be deter-
mined by fixing one of the other three parameters.
Referring to fig. 1 the suggestedR2 value should
be higher than 2K
in order to have a good THD
(internalop. amp. current limit).
Viceversa the R1 value should be equal or lower
than 51K
in order to keep the ”click”(DC step)
verylow.
A typical applicationis shown by fig. 2
Fig. 1
TDA7317
4/12
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TDA7318 | 功能描述:音頻 DSP Digital Audio 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(fēng)格: 封裝 / 箱體: 封裝:Tube |
| TDA7318D | 功能描述:IC PROCESSOR STEREO DGTL 28-SOIC 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 |
| TDA7318D013TR | 功能描述:音頻 DSP Digital Audio 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(fēng)格: 封裝 / 箱體: 封裝:Tube |
| TDA7319 | 功能描述:音頻 DSP Digital Audio 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(fēng)格: 封裝 / 箱體: 封裝:Tube |
| TDA7319D | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:3 BAND DIGITAL CONTROLLED AUDIO PROCESSOR |
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