参数资料
| 型号： | MAX9756EVKIT |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 5/13页 |
| 文件大小： | 0K |
| 描述： | EVAL KIT FOR MAX9756 |
| 标准包装： | 1 |
| 类型： | 放大器：AB 类音频放大器 |
| 适用于相关产品： | MAX9756 |
| 所含物品： | 完全组装的评估板 |
MAX9756 Evaluation Kit
Table 6. JU7/JU10/JU11 Jumper Selection
RELEASE TIME
JU10
JU11
C CT (μF)
ATTACK TIME
1-4
JU7
1-3
1-2*
Not installed*
Installed
Installed
Not installed*
Not installed
Installed
0.033
0.363
1.363
495μs
5.45ms
20.45ms
99ms
1.09s
4.09s
313ms
3.45s
12.9s
990ms
10.9s
40.9s
* Default position.
Table 7. JU12 Jumper Selection
and 5 for shunt positions. The resistors installed on the
MAX9756 EV kit set the output voltage to 3.3V. To
R 7 = R 6 ? OUT ? 1 ?
SHUNT POSITION
Not installed
Installed*
* Default position.
FUNCTION
ALC enabled
ALC disabled
change the voltage, replace R6 and R7. Use the follow-
ing equation to select resistor values:
? V ?
? V SET ?
Output Power Threshold
Resistor R4 in series with potentiometer R5 adjusts the
output power threshold of the MAX9756. Resistor R3 is
shipped uninstalled, but is made available for occasions
where a single resistor is desired for evaluation. In this
case, leave resistor R4 open.
Shutdown Mode ( SHDN )
Jumper JU8 controls the shutdown pin ( SHDN ) of the
MAX9756 IC. See Table 8 for shunt positions.
Table 8. JU8 Jumper Selection
where V SET = 1.23V. Choose resistor values between
10k ? and 1M ? .
Evaluating the
MAX9757/MAX9758 Features
To evaluate the features of the MAX9757, disable the
LDO of the MAX9756 by installing a shunt across pins 2
and 3 of jumper JU6.
To evaluate the features of the MAX9758, disable the ALC
of the MAX9756 by installing a shunt on jumper JU12.
Designing with Maxim’s
SHUNT
POSITION
1-2*
2-3
SHDN PIN
High
Low
FUNCTION
MAX9756 enabled
MAX9756 disabled
Automatic Level Control
The power threshold and attack/release time constants
of Maxim ’ s automatic level control circuitry require opti-
mization for each application. The MAX9756 EV kit is
constructed to allow for quick and efficient evaluation of
* Default position.
Analog Volume Control
The thumb-wheel potentiometer R2 adjusts the volume of
the speakers and the headphone over 31 discrete steps.
Low-Dropout Linear Regulator
Jumper JU6 enables/disables the regulator. Jumper
JU9 connects the regulator ’ s feedback input (SET) to
either GND or to resistor-divider R6/R7. See Tables 4
ALC settings.
When custom designing the MAX9756 ALC function for
a specific application, follow these steps to ensure opti-
mum performance:
Step 1. Define the output power threshold.
Step 2. Define the gain setting.
Step 3. Define the attack time.
Step 4. Define the attack to release time ratio.
_______________________________________________________________________________________
5
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX9757ETJ+ | 功能描述:音频放大器 Integrated Circuits (ICs) 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 |
| MAX9757ETJ+T | 功能描述:音频放大器 Integrated Circuits (ICs) 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 |
| MAX9758ETJ+ | 功能描述:音频放大器 Integrated Circuits (ICs) 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 |
| MAX9758ETJ+T | 功能描述:音频放大器 Integrated Circuits (ICs) 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 |
| MAX9759ETE+ | 功能描述:音频放大器 3.2W Low-EMI Class D Amplifier 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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