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參數(shù)資料
| 型號(hào)： | AS1703-T |
| 廠商： | AUSTRIAMICROSYSTEMS AG |
| 元件分類(lèi)： | 音頻／視頻放大 |
| 英文描述： | 1.6W Single-Channel Audio Power Amplifiers |
| 中文描述： | 1.6 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO10 |
| 封裝： | 3 X 3 MM, 0.80 MM HEIGHT, MSOP-10 |
| 文件頁(yè)數(shù)： | 9/13頁(yè) |
| 文件大小： | 187K |
| 代理商： | AS1703-T |
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www.austriamicrosystems.com
Revision 1.01
9 - 13
AS1702, AS1703, AS1704, AS1705
Data Sheet
austria
micro
systems
Layout and Grounding Considerations
7.4.2 Input Filter
The BTL inputs can be biased at voltages other than mid-supply. However, the integrated common-mode feedback cir-
cuit adjusts for input bias, ensuring the outputs are still biased at mid-supply. Input capacitors are not required if the
common-mode input voltage (V
IC
) is within the range specified in Table 2 and Table 3.
Input capacitor C
IN
(if used), in conjunction with R
IN
, forms a high-pass filter that removes the DC bias from an incom-
ing signal. The AC coupling capacitor allows the amplifier to bias the signal to an optimum DC level. Assuming zero-
source impedance, the -3dB point of the high-pass filter is given by:
Setting f
-3dB
too high affects the low-frequency response of the amplifier. Capacitors with dielectrics that have low-volt-
age coefficients such as tantalum or aluminum electrolytic should be used, since capacitors with high-voltage coeffi-
cients, such as ceramics, can increase distortion at low frequencies.
7.4.3 BIAS Capacitor
BIAS is the output of the internally generated V
CC
/2 bias voltage. The BIAS bypass capacitor, C
BIAS
, improves PSRR
and THD+N by reducing power supply noise and other noise sources at the common-mode bias node, and also gener-
ates the click- and pop-less DC bias waveform for the amplifiers. Bypass BIAS with a 0.1μF capacitor to GND. Larger
values of C
BIAS
(up to 1μF) improve PSRR, but increase t
ON
/t
OFF
times. For example, a 1μF C
BIAS
capacitor increases
t
ON
/t
OFF
by 10 and improves PSRR by 20dB (at 1kHz).
Note:
Do not connect external loads to BIAS.
7.4.4 Supply Bypassing
Proper power supply bypassing – connect a 10μF ceramic capacitor (C
BIAS
) from V
CC
to GND – will ensure low-noise,
low-distortion performance of the device. Additional bulk capacitance can be added as required.
Note:
Place C
BIAS
as close to the device as possible.
7.5 Layout and Grounding Considerations
Well designed PC board layout is essential for optimizing device performance. Use large traces for the power supply
inputs and amplifier outputs to minimize losses due to parasitic trace resistance and route heat away from the device.
Good grounding improves audio performance and prevents digital switching noise from coupling onto the audio signal.
f
-3dB
=
(EQ 8)
1
2
π
R
IN
C
IN
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AS1704-T | 1.6W Single-Channel Audio Power Amplifiers |
| AS1705 | 1.6W Single-Channel Audio Power Amplifiers |
| AS1705-T | ECONOLINE: REC3-S_DR/H1 - 3W DIP Package- 1kVDC Isolation- Regulated Output- UL94V-0 Package Material- Continuous Short Circiut Protection- Internal SMD design- 100% Burned In- Efficiency to 75% |
| AS1710A-ASCT | Single, 100mA, 10MHz, 10V/us; Package Type: SC70-6; Shutdown: Yes |
| AS1710B-ASCT | Single, 100mA, 10MHz, 10V/us; Package Type: SC70-5 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AS1703V | 功能描述:IC AMP AUDIO MONO 1.8W 10-DFN RoHS:是 類(lèi)別:集成電路 (IC) >> 線性 - 音頻放大器 系列:- 標(biāo)準(zhǔn)包裝:2,000 系列:- 類(lèi)型:AB 類(lèi) 輸出類(lèi)型:2 通道（立體聲） 在某負(fù)載時(shí)最大輸出功率 x 通道數(shù)量:- 電源電壓:4 V ~ 18 V 特點(diǎn):- 安裝類(lèi)型:通孔 供應(yīng)商設(shè)備封裝:8-DIP 封裝/外殼:8-DIP（0.300"，7.62mm） 包裝:管件 |
| AS1703V-T | 功能描述:IC AMP AUD 1.8W 0DB GAIN 10-DFN RoHS:是 類(lèi)別:集成電路 (IC) >> 線性 - 音頻放大器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:DirectDrive® 類(lèi)型:D 類(lèi) 輸出類(lèi)型:1-通道（單聲道），帶立體聲耳機(jī) 在某負(fù)載時(shí)最大輸出功率 x 通道數(shù)量:930mW x 1 @ 8 歐姆; 40mW x 2 @ 16 歐姆 電源電壓:2.7 V ~ 5.5 V 特點(diǎn):消除爆音，差分輸入，I²C，靜音，關(guān)閉，音量控制 安裝類(lèi)型:表面貼裝 供應(yīng)商設(shè)備封裝:25-WLP（2.09x2.09） 封裝/外殼:25-WFBGA，WLCSP 包裝:帶卷 (TR) 其它名稱(chēng):MAX97000EWA+T-ND |
| AS1704 | 功能描述:音頻放大器 RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類(lèi)型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
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| AS1704V | 功能描述:IC AMP AUDIO MONO 1.8W 10-DFN RoHS:是 類(lèi)別:集成電路 (IC) >> 線性 - 音頻放大器 系列:- 標(biāo)準(zhǔn)包裝:2,000 系列:- 類(lèi)型:AB 類(lèi) 輸出類(lèi)型:2 通道（立體聲） 在某負(fù)載時(shí)最大輸出功率 x 通道數(shù)量:- 電源電壓:4 V ~ 18 V 特點(diǎn):- 安裝類(lèi)型:通孔 供應(yīng)商設(shè)備封裝:8-DIP 封裝/外殼:8-DIP（0.300"，7.62mm） 包裝:管件 |
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