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AS1704 PDF预览

AS1704

更新时间: 2024-02-11 16:19:23
品牌 Logo 应用领域
艾迈斯 - AMSCO 放大器功率放大器
页数 文件大小 规格书
13页 188K
描述
1.6W Single-Channel Audio Power Amplifiers

AS1704 技术参数

生命周期:Obsolete零件包装代码:DFN
包装说明:3 X 3 MM, 0.80 MM HEIGHT, DFN-10针数:10
Reach Compliance Code:unknownECCN代码:EAR99
HTS代码:8542.33.00.01风险等级:5.75
Is Samacsys:N标称带宽:22 kHz
商用集成电路类型:AUDIO AMPLIFIER增益:3 dB
JESD-30 代码:S-XDSO-N10长度:3 mm
信道数量:1功能数量:1
端子数量:10最高工作温度:85 °C
最低工作温度:-40 °C标称输出功率:1.6 W
封装主体材料:UNSPECIFIED封装代码:HVSON
封装形状:SQUARE封装形式:SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE
认证状态:Not Qualified座面最大高度:1 mm
最大供电电压 (Vsup):5.5 V最小供电电压 (Vsup):2.7 V
表面贴装:YES温度等级:INDUSTRIAL
端子形式:NO LEAD端子节距:0.5 mm
端子位置:DUAL宽度:3 mm
Base Number Matches:1

AS1704 数据手册

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AS1702, AS1703, AS1704, AS1705  
austriamicrosystems  
Data Sheet  
Bias  
6 Detailed Description  
The AS1702, AS1703, AS1704, and AS1705 are 1.6W high output-current audio amplifiers (configured as BTL ampli-  
fiers), and contain integrated low-power shutdown and click- and pop-suppression circuitry. Two inputs (SHDM and  
SHDN) allow shutdown mode to be configured as active-high or active-low (see Section 6.2 Shutdown Mode on  
page 5).  
Each device has either adjustable or fixed gains (0dB, 3dB, 6dB) (see Section 9 Ordering Information on page 12).  
6.1 Bias  
The devices operate from a single 2.7 to 5.5V supply and contain an internally generated, common-mode bias voltage  
of:  
VCC/2  
(EQ 1)  
referenced to ground. Bias provides click-and-pop suppression and sets the DC bias level for the audio outputs. Select  
the value of the bias bypass capacitor as described in Section 7.4.3 BIAS Capacitor on page 9.  
Note: Do not connect external loads to BIAS as this can adversely affect overall device performance.  
6.2 Shutdown Mode  
All devices implement a 100nA, low-power shutdown circuit which reduces quiescent current consumption. As shut-  
down mode commences, the bias circuitry is automatically disabled, the device outputs go high impedance, and bias is  
driven to GND.  
The SHDM input controls the polarity of SHDN:  
!
Drive SHDM high for an active-low SHDN input.  
!
Drive SHDM low for an active-high SHDN input.  
Table 4. Shutdown Mode Selection Configurations  
SHDM  
SHDN  
Mode  
0
0
1
1
0
1
0
1
Shutdown Mode Enabled  
Normal Operation Enabled  
Normal Operation Enabled  
Shutdown Mode Enabled  
6.3 Click-and-Pop Suppression  
During power-up, the device common-mode bias voltage (VBIAS (page 3)) ramps to the DC bias point. When entering  
shutdown, the device outputs are driven high impedance to 100kbetween both outputs minimizing the energy  
present in the audio band, thus preventing clicks and pops.  
www.austriamicrosystems.com  
Revision 1.01  
5 - 13  

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