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参数资料
| 型号： | MAX9726AETP+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 6/24页 |
| 文件大小： | 0K |
| 描述： | IC AMP AUDIO .124W STER 20TQFN |
| 标准包装： | 2,500 |
| 系列： | DirectDrive® |
| 类型： | AB 类 |
| 输出类型： | 耳机，2-通道（立体声） |
| 在某负载时最大输出功率 x 通道数量： | 124mW x 2 @ 16 欧姆 |
| 电源电压： | 2.7 V ~ 5.5 V |
| 特点： | 低音增强模式，消除爆音，I²C，静音，短路和热保护，关机，音量控制 |
| 安装类型： | 表面贴装 |
| 供应商设备封装： | 20-TQFN-EP（4x4） |
| 封装/外壳： | 20-WFQFN 裸露焊盘 |
| 包装： | 带卷 (TR) |
MAX9726
Write Data Format
A write to the MAX9726 includes transmission of a
START condition, the slave address with the R/W bit set
to 0 (see Table 1), one byte of data to configure the
command register, and a STOP condition. Figure 6
illustrates the proper format for one frame.
The MAX9726 only accepts write data, but it acknowl-
edges the receipt of its address byte with the R/W bit
set to 1. The MAX9726 does not write to the SDA bus in
the event that the R/W bit is set to 1. Subsequently, the
master reads all 1’s from the MAX9726. Always set the
R/W bit to zero to avoid this situation.
Command Register
The MAX9726 has one command register that is used
to enable/disable shutdown, enable/disable BassMax,
and set the volume. Table 2 describes the function of
the bits contained in the command register.
Set B7 to 0 to shutdown the MAX9726. The MAX9726
wakes up from shutdown when B7 is set to 1 provided
SHDN is high. SHDN must be high and B7 must be set
to 1 for the MAX9726 to operate normally (see Table 3).
Set B6 to 1 to enable BassMax (see Table 4). The out-
put signal’s low-frequency response is boosted accord-
ing to the external components connected between
OUT_ and BM_. See the
Gain-Setting Components sec-
tion for details on choosing the external components.
Adjust the MAX9726’s volume with control bits [5:0].
The volume is adjustable to one of 64 steps ranging
from full mute to the maximum gain set by the external
components. Table 5 lists all the possible volume set-
tings for the MAX9726. Figure 7 shows the volume-con-
trol transfer function for the MAX9726.
DirectDrive, Headphone Amplifier with
BassMax, I2C, Volume and Gain Control
14
______________________________________________________________________________________
S
A
0
ACKNOWLEDGE FROM MAX9726
R/W
START
CONDITION
ACKNOWLEDGE
FROM MAX9726
B7 B6 B5 B4 B3 B2
COMMAND BYTE IS STORED ON
RECEIPT OF STOP CONDITION
A
P
B1 B0
SLAVE ADDRESS
COMMAND BYTE
STOP
CONDITION
Figure 6. Write Data Format Example
MAX9726
fig07
CODE (DECIMAL)
ATTENUATION
OF
MAX.
GAIN
SETTING
(dB)
48
32
16
100
80
60
40
20
0
120
064
Figure 7. Volume-Control Transfer Function
Table 2. Command Register
B7
B6
B5
B4
B3
B2
B1
B0
Shutdown
BassMax
Enable
Volume (See Table 5)
Table 3. Shutdown Control, SHDN = VDD
MODE
B7
Disabled
0
Enabled
1
Table 4. BassMax Control
MODE
B6
BassMax Disabled
0
BassMax Enabled
1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX9726BEBP+ | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX9726BEBP+T | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX9726BETP+ | 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 |
| MAX9726BETP+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 |
| MAX9726EVKIT+ | 功能描述:放大器 IC 开发工具 RoHS:否 制造商:International Rectifier 产品:Demonstration Boards 类型:Power Amplifiers 工具用于评估:IR4302 工作电源电压:13 V to 23 V |
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