參數(shù)資料
型號(hào)： MAX9726AETP+
廠商： Maxim Integrated Products
文件頁(yè)數(shù)： 6/24頁(yè)
文件大小： 0K
描述： IC AMP AUDIO .124W STER 20TQFN
標(biāo)準(zhǔn)包裝： 75
系列： DirectDrive®
類(lèi)型： AB 類(lèi)
輸出類(lèi)型： 耳機(jī)，2-通道（立體聲）
在某負(fù)載時(shí)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(lèi)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(pán)
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(lèi)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(lèi)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(lèi)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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