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參數(shù)資料
| 型號(hào)： | AS1702 |
| 廠商： | AUSTRIAMICROSYSTEMS AG |
| 英文描述： | 1.6W Single-Channel Audio Power Amplifiers |
| 中文描述： | 為1.6W單聲道音頻功率放大器 |
| 文件頁(yè)數(shù)： | 5/13頁(yè) |
| 文件大小： | 187K |
| 代理商： | AS1702 |
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www.austriamicrosystems.com
Revision 1.01
5 - 13
AS1702, AS1703, AS1704, AS1705
Data Sheet
austria
micro
systems
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:
V
CC
/2
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.
(EQ 1)
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.
6.3 Click-and-Pop Suppression
During power-up, the device common-mode bias voltage (V
BIAS
(page 3)) ramps to the DC bias point. When entering
shutdown, the device outputs are driven high impedance to 100k
between both outputs minimizing the energy
present in the audio band, thus preventing clicks and pops.
Table 4. Shutdown Mode Selection Configurations
SHDM
SHDN
0
0
0
1
1
0
1
1
Mode
Shutdown Mode Enabled
Normal Operation Enabled
Normal Operation Enabled
Shutdown Mode Enabled
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AS1703 | 1.6W Single-Channel Audio Power Amplifiers |
| AS1703-T | 1.6W Single-Channel Audio Power Amplifiers |
| 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% |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AS1702_1 | 制造商:AMSCO 制造商全稱:austriamicrosystems AG 功能描述:1.8W Single-Channel Audio Power Amplifiers |
| AS1702_DK_ST | 功能描述:AS1702-05 - 1-Channel (Mono) Output Class AB Audio Amplifier Evaluation Board 制造商:ams 系列:- 零件狀態(tài):有效 放大器類型:AB 類 輸出類型:1-通道（單聲道） 不同負(fù)載時(shí)的最大輸出功率 x 通道數(shù):1.8W x 1 @ 4 歐姆 電壓 - 電源:2.7 V ~ 5.5 V 板類型:完全填充 使用的 IC/零件:AS1702-05 所含物品:板 標(biāo)準(zhǔn)包裝:1 |
| AS1702-05 DB | 功能描述:BOARD DEMO AS1702-05 RoHS:否 類別:編程器，開(kāi)發(fā)系統(tǒng) >> 評(píng)估板 - 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:1 系列:- |
| AS1702-05-DB | 制造商:ams 功能描述:AS1702-05 Demo Board |
| AS1702-T | 功能描述:IC AMP AUD 1.8W ADJ GAIN 10-MSOP RoHS:是 類別: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® 類型:D 類 輸出類型: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:MAX97000EWA+T-ND |
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