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MAX97220A Evaluation Kit
Quick Start
Recommended Equipment
? MAX97220A EV kit
? 2.5V to 5.5V DC supply
? Stereo audio signal source
? Pair of stereo headphones
Procedure
The EV kit is fully assembled and tested. Follow the
steps below to verify board operation. Caution:_Do_not_
turn_ on_ the_ power_ supply_ until_ all_ connections_ are_
completed.
9) Connect the right output of the audio source to the
INR- pad.
10) Connect the ground of the audio source to the INR+
pad.
11) Enable the stereo audio source.
12) Enable the power-supply output.
13) Verify that the headphones are playing the audio
source signal.
Detailed Description
The MAX97220A EV kit features the MAX97220A differen-
tial stereo headphone driver with DirectDrive, designed
1)
2)
3)
4)
5)
6)
7)
8)
Verify that a shunt is installed across jumper JU1
(device enabled).
Set the power-supply output to 5V.
Disable the power-supply output.
Connect the power-supply ground to the GND pad
and the power-supply positive output to the VDD
pad on the EV kit.
Connect headphones to the stereo headphone jack
(HP_OUT) provided on the EV kit.
Verify that the audio source output is disabled.
Connect the left output of the audio source to the
INL- pad.
Connect the ground of the audio source to the INL+
pad.
to directly drive a 125mW into a 32 I stereo headphone.
The EV kit operates from a DC power supply that can
provide 2.5V to 5.5V and accepts two sets of differential
audio inputs.
Headphone Amplifier Shutdown
Jumper JU1 enables or disables the headphone ampli-
fier. See Table 1 for jumper JU1 configuration.
MAX97220C/MAX97220D Usage
When replacing the MAX97220A with either the
MAX97220C or MAX97220D, several external compo-
nents must be changed. R1–R4 should be replaced with
0ω resistors. R5–R8 should be removed from the PCB.
C11–C16 should be left uninstalled (same as the default
EV kit setting).
Table_1._Shutdown_Input_(JU1)
SHUNT_POSITION
Installed*
Not installed
SHDN _PIN
Connected to VDD
Connected to GND
through R9
AMPLIFIER
Enabled
Disabled
* Default position.
2_ _ _______________________________________________________________________________________
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相关代理商/技术参数
MAX97220BETE+ 功能描述:音频放大器 DirectDrive LDriver Headphone 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
MAX97220BETE+T 功能描述:音频放大器 DirectDrive LDriver Headphone 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
MAX97220CETE+ 功能描述:音频放大器 DirectDrive LDriver Headphone 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
MAX97220CETE+T 功能描述:音频放大器 DirectDrive LDriver Headphone 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
MAX97220DETE+ 功能描述:音频放大器 DirectDrive LDriver Headphone 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
MAX97220DETE+T 功能描述:音频放大器 DirectDrive LDriver Headphone 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
MAX97220EETE+ 功能描述:音频放大器 DirectDrive LDriver Headphone 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
MAX97220EETE+T 功能描述:音频放大器 DirectDrive LDriver Headphone 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