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参数资料
| 型号： | MAX9718DEBL+TG45 |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 4/27页 |
| 文件大小： | 0K |
| 描述： | IC AMP AUDIO PWR 1.4W MONO 9UCSP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | AB 类 |
| 输出类型： | 1-通道（单声道） |
| 在某负载时最大输出功率 x 通道数量： | 1.4W x 1 @ 4 欧姆 |
| 电源电压： | 2.7 V ~ 5.5 V |
| 特点： | 消除爆音，差分输入，关闭，热保护 |
| 安装类型： | 表面贴装 |
| 供应商设备封装： | 9-UCSP（3x3） |
| 封装/外壳： | 9-UFBGA，WLCSP |
| 包装： | 带卷 (TR) |
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MAX9718/MAX9719
Input Filter
The fully differential amplifier inputs can be biased at
voltages other than midsupply. The common-mode
feedback circuit adjusts for input bias, ensuring the
outputs are still biased at midsupply. Input capacitors
are not required as long as the common-mode input
voltage is within the specified range listed in the
Electrical Characteristics table.
If input capacitors are used, input capacitor CIN, in
conjunction with RIN, forms a highpass filter that
removes the DC bias from an incoming signal. The AC-
coupling capacitor allows the amplifier to bias the sig-
nal to an optimum DC level. Assuming zero-source
impedance, the -3dB point of the highpass filter is
given by:
Setting f-3dB too high affects the low-frequency
response of the amplifier. Use capacitors with
dielectrics that have low-voltage coefficients, such as
tantalum or aluminum electrolytic. Capacitors with high-
voltage coefficients, such as ceramics, can increase
distortion at low frequencies.
BIAS Capacitor
BIAS is the output of the internally generated VCC /2
bias voltage. The BIAS bypass capacitor, CBIAS,
improves PSRR and THD+N by reducing power supply
and other noise sources at the common-mode bias
node, and also generates the clickless/popless startup
DC bias waveform for the speaker amplifiers. Bypass
BIAS with a 0.1F capacitor to GND. Larger values of
CBIAS (up to 1F) improve PSRR, but slow down
tON/tOFF times. A 1F CBIAS capacitor slows turn-on
and turn-off times by 10 and improves PSRR by 20dB
(at 1kHz). Do not connect external loads to BIAS.
Supply Bypassing
Proper power-supply bypassing ensures low-noise,
low-distortion performance. Connect a 1F ceramic
capacitor from VCC to GND. Add additional bulk
capacitance as required by the application. Locate the
bypass capacitor as close to the device as possible.
Layout and Grounding
Good PC board layout is essential for optimizing perfor-
mance. 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, minimizes
crosstalk between channels, and prevents any digital
switching noise from coupling into the audio signal.
The MAX9718/MAX9719 TDFN, TQFN, TSSOP, and
MAX packages feature exposed thermal pads on their
undersides. This pad lowers the thermal resistance of the
package by providing a direct-heat conduction path
from the die to the PC board. Connect the exposed pad
to the ground plane using multiple vias, if required.
UCSP Applications Information
For the latest application details on UCSP construction,
dimensions, tape carrier information, PC board tech-
niques, bump-pad layout, and recommended reflow tem-
perature profile, as well as the latest information on
reliability testing results, refer to the Application Note
1891:
Wafer-Level Packaging (WLP) and Its Applications.
f
RC
dB
IN IN
=
3
1
2
π
Low-Cost, Mono/Stereo,
1.4W Differential Audio Power Amplifiers
12
______________________________________________________________________________________
PART
MONO STEREO
GAIN
(dB)
SELECTABLE
SHUTDOWN
POLARITY
MAX9718A/H
√
—
Adjustable
√
MAX9718B/E
√
—0
√
MAX9718C/F
√
—3
√
MAX9718D/G
√
—6
√
MAX9719A
—
√
Adjustable
—
MAX9719B
—
√
0—
MAX9719C
—
√
3—
MAX9719D
—
√
6—
Selector Guide
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX9718DETB+ | 制造商:Maxim Integrated Products 功能描述:AUD AMP SPKR 1CH MONO 1.4W CLS-AB 10TDFN EP - Rail/Tube |
| MAX9718DETB+T | 功能描述:音频放大器 Mono/Stereo 1.4W BTL Audio Power Amp RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| MAX9718DETB-T | 功能描述:音频放大器 RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| MAX9718DEUB | 制造商:Maxim Integrated Products 功能描述:LOW-COST, MONO/STEREO, 1.4W DIFFERENTIAL AUDI - Rail/Tube |
| MAX9718DEUB+ | 功能描述:音频放大器 Mono/Stereo 1.4W BTL Audio Power Amp RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
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