參數(shù)資料
型號(hào)： MAX9729ETI+T
廠商： Maxim Integrated Products
文件頁(yè)數(shù)： 2/28頁(yè)
文件大小： 0K
描述： IC AMP AUDIO .052W STER 28TQFN
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 2,500
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： 52mW x 2 @ 32 歐姆
電源電壓： 1.8 V ~ 3.6 V
特點(diǎn)： 帶低音增強(qiáng)模式，消除爆音，I²C，輸入多路復(fù)用器，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： 28-TQFN-EP（5x5）
封裝/外殼： 28-WFQFN 裸露焊盤(pán)
包裝： 帶卷 (TR)
MAX9729
Detailed Description
The MAX9729 stereo headphone amplifier features
Maxim’s DirectDrive architecture, eliminating the large
output-coupling capacitors required by conventional
single-supply headphone amplifiers. The MAX9729
consists of two 52mW Class AB headphone amplifiers,
3:1 stereo input multiplexer/mixer, two adjustable gain
preamplifiers, a dedicated beep amplifier with indepen-
dent gain control, hardware/software shutdown control,
inverting charge pump, integrated 32-level volume con-
trol, BassMax circuitry, comprehensive click-and-pop
suppression circuitry, and an I2C/SMBus-compatible
interface (see the
Functional Diagram/Typical
Operating Circuit). A negative power supply (PVSS) is
created internally by inverting the positive supply
(PVDD). Powering the amplifiers from VDD and PVSS
increases the dynamic range of the amplifiers to almost
twice that of other single-supply amplifiers, increasing
the total available output power.
An I2C/SMBus-compatible interface allows serial com-
munication between the MAX9729 and a microcon-
troller. The MAX9729’s slave address is programmed to
one of two different values using the ADD input allowing
two MAX9729 ICs to share the same bus (see Table 1).
The internal command registers control the shutdown
mode of the MAX9729, select/mix input signal sources,
enable the BassMax circuitry, headphone and beep
amplifier gains, and set the volume level (see Table 2).
The MAX9729’s BassMax circuitry improves audio
reproduction by boosting the bass response of the
amplifier, compensating for any low-frequency attenua-
tion introduced by the headphone. External compo-
nents set the MAX9729’s overall gain allowing for
custom gain settings (see the
BassMax Gain-Setting
Components section).
DirectDrive
Traditional single-supply headphone amplifiers have
their outputs biased about a nominal DC voltage, typi-
cally half the supply, for maximum dynamic range.
Large coupling capacitors are needed to block this DC
bias from the headphone. Without these capacitors, a
significant amount of DC current flows to the head-
Stereo Headphone Amplifier with BassMax,
Volume Control, and Input Mux
10
______________________________________________________________________________________
Pin Description (continued)
PIN
NAME
FUNCTION
16
BMR
Right BassMax Input. Connect an external passive network between OUTR and BMR to apply bass
boost to the right-channel output. See the BassMax Gain-Setting Components section. Connect BMR to
SGND if BassMax is not used.
17
OUTR
Right Headphone Output
18
OUTL
Left Headphone Output
19
BML
Left BassMax Input. Connect an external passive network between OUTL and BML to apply bass boost
to the left-channel output. See the BassMax Gain-Setting Components section. Connect BML to SGND,
if BassMax is not used.
20
BEEP_EN
Beep Enable Input. Connect BEEP_EN to PVDD to enable the beep amplifier or to PGND to disable the
beep amplifier.
21
SHDN
Active-Low Shutdown Input. Drive SHDN low to disable the MAX9729. Connect SHDN to VDD while B7
in command register 0x00 is equal to 1 for normal operation (see Command Registers section).
23
VDD
Power-Supply Input. Bypass VDD to PGND with a 1F capacitor and connect to PVDD. VDD and PVDD
are internally connected and should each have a 1F bypass capacitor located as to close to the
device as possible.
24
BEEP
Beep Input
25
INL1
Left-Channel Input 1
26
INL2
Left-Channel Input 2
27
INL3
Left-Channel Input 3
28
INR1
Right-Channel Input 1
EP
Exposed Paddle. Connect EP to SVSS or leave unconnected.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX9729EVCMAXQU+ 功能描述:音頻放大器 Evaluation Kit/Evaluation System for the MAX9729 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
MAX9729EVKIT+ 功能描述:音頻放大器 Evaluation Kit/Evaluation System for the MAX9729 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
MAX972C/D 功能描述:校驗(yàn)器 IC RoHS:否 制造商:STMicroelectronics 產(chǎn)品: 比較器類(lèi)型: 通道數(shù)量: 輸出類(lèi)型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補(bǔ)償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應(yīng)時(shí)間: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel
MAX972CPA 功能描述:校驗(yàn)器 IC Dual Comparator RoHS:否 制造商:STMicroelectronics 產(chǎn)品: 比較器類(lèi)型: 通道數(shù)量: 輸出類(lèi)型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補(bǔ)償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應(yīng)時(shí)間: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel
MAX972CPA+ 功能描述:校驗(yàn)器 IC Dual Comparator RoHS:否 制造商:STMicroelectronics 產(chǎn)品: 比較器類(lèi)型: 通道數(shù)量: 輸出類(lèi)型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補(bǔ)償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應(yīng)時(shí)間: 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel
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