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| 型号： | MAX9778ETI+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 8/27页 |
| 文件大小： | 0K |
| 描述： | IC AMP AUDIO PWR 2.6W AB 28TQFN |
| 标准包装： | 60 |
| 类型： | AB 类 |
| 输出类型： | 2-通道（立体声）带立体声耳机 |
| 在某负载时最大输出功率 x 通道数量： | 2.6W x 2 @ 4 欧姆; 200mW x 2 @ 16 欧姆 |
| 电源电压： | 4.5 V ~ 5.5 V |
| 特点： | 消除爆音，输入多路复用器，静音，关机，热保护， |
| 安装类型： | 表面贴装 |
| 供应商设备封装： | 28-TQFN-EP（5x5） |
| 封装/外壳： | 28-WFQFN 裸露焊盘 |
| 包装： | 管件 |
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MAX9777/MAX9778
Stereo 3W Audio Power Amplifiers with
Headphone Drive and Input Mux
16
_
__
_
Write Data Format
There are three registers that configure the MAX9777:
the MUTE register, SHDN register, and control register.
In write data mode (R/W = 0), the register address and
data byte follow the device address (Figure 7).
MUTE Register
The MUTE register (01hex) is a read/write register that
sets the MUTE status of the device. Bit 3 (MUTEL) of
the MUTE register controls the left channel; bit 4
(MUTER) controls the right channel. A logic-high mutes
the respective channel; a logic-low brings the channel
out of mute.
SHDN Register
The SHDN register (02hex) is a read/write register that
controls the power-up state of the device. A logic-high
in bit 0 of the SHDN register shuts down the device; a
logic-low turns on the device. A logic-high is required in
bits 2 to 7 to reset all registers to their default settings.
Control Register
The control register (03hex) is a read/write register that
determines the device configuration. Bit 1 (IN1/IN2) con-
trols the input multiplexer, a logic-high selects input 1; a
logic-low selects input 2. Bit 2 (HPS_D) controls the
headphone sensing. A logic-low configures the device in
automatic headphone detection mode. A logic-high dis-
ables the HPS input. Bit 3 (GAINA/B) controls the gain-
select multiplexer. A logic-low selects GAINA. A logic-
high selects GAINB. GAINA/B is ignored when HPS_D =
0. Bit 4 (SPKR/HP) selects the amplifier operating mode
when HPS_D = 1. A logic-high selects speaker mode,
and a logic-low selects headphone mode.
S
ADDRESS
7 BITS
8 BITS
1
WR
ACK
COMMAND
ACK
DATA
ACK
P
I2C SLAVE ADDRESS.
SELECTS DEVICE.
REGISTER ADDRESS.
SELECTS REGISTER TO BE
WRITTEN TO.
REGISTER DATA
I2C SLAVE ADDRESS.
SELECTS DEVICE.
DATA FROM
SELECTED REGISTER
S
ADDRESS
7 BITS
8 BITS
1
WR
ACK
COMMAND
ACK
DATA
P
I2C SLAVE ADDRESS.
SELECTS DEVICE.
REGISTER ADDRESS.
SELECTS REGISTER
TO BE READ.
S
ADDRESS
7 BITS
WR
ACK
Figure 7. Write/Read Data Format Example
REGISTER
ADDRESS
0000 0001
BIT
NAME
VALUE
DESCRIPTION
7
X
Don’t Care
—
6
X
Don’t Care
—
5
X
Don’t Care
—
0*
Unmute right channel
4
MUTER
1
Mute right channel
0*
Unmute left channel
3
MUTEL
1
Mute left channel
2
X
Don’t Care
—
1
X
Don’t Care
—
0
X
Don’t Care
—
Table 3. MAX9777 MUTE Register Format
*Default state.
REGISTER ADDRESS
0000 0010
BIT
NAME
VALUE
DESCRIPTION
0*
—
7
RESET
1
Reset device
0*
—
6
RESET
1
Reset device
0*
—
5
RESET
1
Reset device
0*
—
4
RESET
1
Reset device
0*
—
3
RESET
1
Reset device
0*
—
2
RESET
1
Reset device
1
X
Don’t Care
—
0*
Normal operation
0
SHDN
1
Shutdown
Table 4. MAX9777 SHDN Register Format
*Default state.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX9778ETI+ | 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 |
| MAX9778ETI+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 |
| MAX9779ETI+ | 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 |
| MAX9779ETI+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 |
| MAX977EEE | 功能描述:校验器 IC 3V/5V Dual-Speed Comparator RoHS:否 制造商:STMicroelectronics 产品: 比较器类型: 通道数量: 输出类型:Push-Pull 电源电压-最大:5.5 V 电源电压-最小:1.1 V 补偿电压（最大值）:6 mV 电源电流（最大值）:1350 nA 响应时间: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SC-70-5 封装:Reel |
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