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參數(shù)資料
| 型號： | MAX97000EWA+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 14/34頁 |
| 文件大小： | 0K |
| 描述： | IC AUDIO SUBSYSTEM 25WLP |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 1 |
| 系列： | DirectDrive® |
| 類型： | D 類 |
| 輸出類型： | 1-通道（單聲道），帶立體聲耳機 |
| 在某負載時最大輸出功率 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： | 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： | 標準包裝 |
| 其它名稱： | MAX97000EWA+TDKR |
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Audio Subsystem with Mono Class D
Speaker and Class H Headphone Amplifier
MAX97000
21
Distortion Limiter
The MAX97000 speaker amplifiers integrate a limiter
to provide speaker protection and audio compression.
When enabled, the limiter monitors the audio signal at
the output of the Class D speaker amplifier and decreas-
es the gain if the distortion exceeds the predefined
threshold. The limiter automatically tracks the battery
voltage to reduce the gain as the battery voltage drops.
Figure 5 shows the typical output vs. input curves with
and without the distortion limiter. The dotted line shows
the maximum gain for a given distortion limit without
the distortion limiter. The solid line shows how, with the
distortion limiter enabled, the gain can be increased
without exceeding the set distortion limit. When the
limiter is enabled, selecting a high gain level results in
peak signals being attenuated while low signals are left
unchanged. This increases the perceived loudness with-
out the harshness of a clipped waveform.
Analog Switch
The MAX97000 integrates a DPST analog audio switch.
This switch can be used to disconnect an independent
audio signal, or drive the 8I speaker by connecting
NC1 and NC2 to OUTN and OUTP, respectively. Unlike
discrete solutions, the switch design reduces coupling
of Class D switching noise to the COM_ inputs. This
eliminates the need for a costly T-switch. Drive COM1
and COM2 with a low-impedance source to minimize
noise on the pins. In applications that do not require
the analog switch, leave COM1, COM2, NC1, and NC2
unconnected.
Headphone Amplifier
DirectDrive
Traditional single-supply headphone amplifiers have
outputs biased at a nominal DC voltage (typically half
the supply). Large coupling capacitors are needed to
block this DC bias from the headphone. Without these
capacitors, a significant amount of DC current flows to
the headphone, resulting in unnecessary power dis-
sipation and possible damage to both headphone and
headphone amplifier.
Maxim’s DirectDrive architecture uses a charge
pump to create an internal negative supply voltage.
This allows the headphone outputs of the MAX97000
to be biased at GND while operating from a single
supply (Figure 6). Without a DC component, there is
no need for the large DC-blocking capacitors. Instead
of two large (220FF, typ) capacitors, the MAX97000
charge pump requires three small ceramic capacitors,
Figure 5. Limiter Gain Curve
DirectDrive is a registered trademark of Maxim Integrated Products, Inc.
Figure 6. Traditional Amplifier Output vs. MAX97000
DirectDrive Output
MAXIMUM THD+N
LEVEL
VOUT
VIN
VDD
VDD / 2
GND
CONVENTIONAL AMPLIFIER BIASING SCHEME
DirectDrive AMPLIFIER BIASING SCHEME
+VDD
SGND
-VDD
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX97001EVKIT+ | 功能描述:音頻 IC 開發(fā)工具 MAX97001 Eval Kit RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評估:TAS5614L 工作電源電壓:12 V to 38 V |
| MAX97001EWP+T | 功能描述:音頻放大器 Audio Subsystem w/ Mono Class D RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型: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 |
| MAX97002EVKIT+ | 功能描述:音頻 IC 開發(fā)工具 MAX97002 Eval Kit RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評估:TAS5614L 工作電源電壓:12 V to 38 V |
| MAX97002EWP+T | 功能描述:音頻放大器 Audio Subsystem w/ Mono Class D RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型: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 |
| MAX97003EVKIT# | 功能描述:音頻 IC 開發(fā)工具 MAX97003 Eval Kit RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評估:TAS5614L 工作電源電壓:12 V to 38 V |
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