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參數(shù)資料
| 型號： | MAX9726AETP+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 6/24頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC AMP AUDIO .124W STER 20TQFN |
| 標(biāo)準(zhǔn)包裝： | 75 |
| 系列： | DirectDrive® |
| 類型： | AB 類 |
| 輸出類型： | 耳機(jī)，2-通道（立體聲） |
| 在某負(fù)載時最大輸出功率 x 通道數(shù)量： | 124mW x 2 @ 16 歐姆 |
| 電源電壓： | 2.7 V ~ 5.5 V |
| 特點(diǎn)： | 低音增強(qiáng)模式，消除爆音，I²C，靜音，短路和熱保護(hù)，關(guān)機(jī)，音量控制 |
| 安裝類型： | 表面貼裝 |
| 供應(yīng)商設(shè)備封裝： | 20-TQFN-EP（4x4） |
| 封裝/外殼： | 20-WFQFN 裸露焊盤 |
| 包裝： | 管件 |
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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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX9726AETP+ | 功能描述:音頻放大器 Integrated Circuits (ICs) RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| MAX9726AETP+T | 功能描述:音頻放大器 Integrated Circuits (ICs) RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| 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:音頻放大器 Integrated Circuits (ICs) RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
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