參數(shù)資料
型號： MAX9729ETI+T
廠商： Maxim Integrated Products
文件頁數(shù)： 14/28頁
文件大?。?/td> 0K
描述： IC AMP AUDIO .052W STER 28TQFN
產(chǎn)品培訓模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標準包裝： 2,500
系列： DirectDrive®
類型： AB 類
輸出類型： 耳機，2-通道（立體聲）
在某負載時最大輸出功率 x 通道數(shù)量： 52mW x 2 @ 32 歐姆
電源電壓： 1.8 V ~ 3.6 V
特點： 帶低音增強模式，消除爆音，I²C，輸入多路復用器，短路和熱保護，關(guān)機，音量控制
安裝類型： 表面貼裝
供應商設(shè)備封裝： 28-TQFN-EP（5x5）
封裝/外殼： 28-WFQFN 裸露焊盤
包裝： 帶卷 (TR)
Charge-Pump Flying Capacitor (C1)
The charge-pump flying capacitor connected between
C1N and C1P affects the charge pump’s load regula-
tion and output impedance. Choosing too small a flying
capacitor degrades the MAX9729’s ability to provide
sufficient current drive and leads to a loss of output
voltage. Increasing the value of the flying capacitor
improves load regulation and reduces the charge-
pump output impedance. See the Output Power vs.
Charge-Pump Capacitance and Load Resistance
graph in the
Typical Operating Characteristics. Place
C1 physically close to C1P and C1N. Use a 1F capac-
itor for C1 in most applications.
Charge-Pump Hold Capacitor (C2)
The hold capacitor’s value and ESR directly affect the
ripple at PVSS. Ripple is reduced by increasing the
value of the hold capacitor. Choosing a capacitor with
lower ESR reduces ripple and output impedance. Lower
capacitance values can be used in systems with low
maximum output power levels. See the Output Power vs.
Charge-Pump Capacitance and Load Resistance graph
in the
Typical Operating Characteristics. C2 should be
equal to the value of C1. Place C2 physically close to
PVSS and SVSS. Connect PVSS and SVSS together at
C2. Use a 1F capacitor for C2 in most applications.
PVDD Bypass Capacitor (C3)
The PVDD bypass capacitor lowers the output imped-
ance of the power supply and reduces the impact of
the MAX9729’s charge-pump switching transients. C3
should be greater than or equal to C1. Place C3 physi-
cally close to PVDD.
MAX9729
Stereo Headphone Amplifier with BassMax,
Volume Control, and Input Mux
______________________________________________________________________________________
21
100
70
80
90
50
60
10
20
30
40
0
5
10
15
20
25
30
35
MAX9729 VOLUME CONTROL
TRANSFER FUNCTION
CODE (DECIMAL)
ATTENUATION
(dB)
Figure 8. MAX9729 Volume Control Transfer Function
B7
B6
B5
BEEP LEVEL (dBV)
0
-10
0
1
-20
0
1
0
-30
0
1
-40
1
0
-50
1
0
1
-52
1
0
-54
1
-56
Table 6. Beep Level (Register 0x01)
BEEP level referenced to a 3V BEEP input.
B3
MODE
0
BassMax Disabled
1
BassMax Enabled
Table 7. BassMax Control (Register 0x01)
B2
B1
B0
MAXIMUM GAIN (dB)
0
3.5
00
1
6
01
0
8
01
1
10
1
0
19.5
10
1
22
11
0
24
11
1
26
Table 8. Maximum Gain Control
(Register 0x01)
Table 9. Initial Power-Up Command Register Status
REGISTER
B7
B6
B5
B4
B3
B2
B1
B0
POR SETTINGS
0x00
1
0
0101
1
Shutdown mode disabled (assuming V
SHDN = VDD), INL1 and
INR1 inputs selected, ATTEN = 16dB (AV_TOTAL = -10dB)
0x01
1
1100
1
Beep input attenuation = 56dB, BassMax enabled, AV_MAX = 6dB
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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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
MAX972C/D 功能描述:校驗器 IC RoHS:否 制造商:STMicroelectronics 產(chǎn)品: 比較器類型: 通道數(shù)量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應時間: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel
MAX972CPA 功能描述:校驗器 IC Dual Comparator RoHS:否 制造商:STMicroelectronics 產(chǎn)品: 比較器類型: 通道數(shù)量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應時間: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel
MAX972CPA+ 功能描述:校驗器 IC Dual Comparator RoHS:否 制造商:STMicroelectronics 產(chǎn)品: 比較器類型: 通道數(shù)量: 輸出類型:Push-Pull 電源電壓-最大:5.5 V 電源電壓-最小:1.1 V 補償電壓（最大值）:6 mV 電源電流（最大值）:1350 nA 響應時間: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SC-70-5 封裝:Reel
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