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參數(shù)資料
| 型號： | MAX9765ETJ+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 16/33頁 |
| 文件大小： | 0K |
| 描述： | IC AMP AUDIO .75W STER AB 32TQFN |
| 標準包裝： | 60 |
| 類型： | AB 類 |
| 輸出類型： | 2-通道（立體聲）帶立體聲耳機 |
| 在某負載時最大輸出功率 x 通道數(shù)量： | 750mW x 2 @ 4 歐姆; 65mW x 2 @ 16 歐姆 |
| 電源電壓： | 2.7 V ~ 5.5 V |
| 特點： | 消除爆音，I²C，輸入多路復用器，麥克風，靜音，短路和熱保護，關機 |
| 安裝類型： | 表面貼裝 |
| 供應商設備封裝： | 32-TQFN-EP（5x5） |
| 封裝/外殼： | 32-WFQFN 裸露焊盤 |
| 包裝： | 管件 |
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MAX9765/MAX9766/MAX9767
750mW Audio Amplifiers with Headphone Amp,
Microphone Preamp, and Input Mux
______________________________________________________________________________________
23
●
Improved PSRR.
●
Higher ground noise immunity.
●
Microphone and preamplifier can be placed physi-
cally farther apart, easing PC board layout require-
ments.
Common-Mode Rejection Ratio
Common-mode rejection ratio (CMRR) refers to an
amplifier’s ability to reject any signal applied equally to
both inputs. In the case of amplifying a low-level micro-
phone signal in noisy digital environments, CMRR is a
key figure of merit. In audio circuits, CMRR is given by:
where ADM is the differential gain, ACM is the common-
mode gain, VINCM is the change in input common-
mode voltage (IN+ and IN- connected together), and
VINDIFF is the differential input voltage.
Typical input voltage magnitudes are small enough
such that the output is not clipped in either differential
or common-mode application. The MAX9765/MAX9766/
MAX9767 differential microphone amplifier architecture
CMRR actually improves as ADM increases—an addi-
tional advantage to the use of differential inputs.
Power Dissipation and Heat Sinking
Under normal operating conditions, the MAX9765/
MAX9766/MAX9767 can dissipate a significant amount
of power. The maximum power dissipation for each
package is given in the Absolute Maximum Ratings
section under Continuous Power Dissipation or can be
calculated by the following equation:
where TJ(MAX) is +150°C, TA is the ambient tempera-
ture, and θJA is the reciprocal of the derating factor in
°C/W as specified in the Absolute Maximum Ratings
P
TT
DISSPKG MAX
J MAX
A
JA
()
=
θ
CMRR dB
A
V
DM
CM
INDIFF
INCM
() ==
+1
VOUT(P-P)
2 x VOUT(P-P)
VOUT(P-P)
-1
Figure 8. Bridge-Tied Load Configuration
REGISTER ADDRESS
0000 0000
BIT
NAME
VALUE
DESCRIPTION
0
Device temperature below thermal limit
7
THRM
1
Device temperature exceeding thermal limit
0
OUTR- current below current limit
6
AMPR-
1
OUTR- current exceeding current limit
0
OUTR+ current below current limit
5
AMPR+
1
OUTR+ current exceeding current limit
0
OUTL- current below current limit
4
AMPL-
1
OUTL- current exceeding current limit
0
OUTL+ current below current limit
3
AMPL+
1
OUTL+ current exceeding current limit
0
Device in speaker mode
2
HPSTS
1
Device in headphone mode
1
X
Don’t Care
—
0
X
Don’t Care
—
Table 7. Status Register Format
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MAX9765ETJ+ | 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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| MAX9765ETJ+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: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| MAX9765ETJ-T | 功能描述:音頻放大器 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 |
| MAX9765EVKIT | 功能描述:放大器 IC 開發(fā)工具 RoHS:否 制造商:International Rectifier 產(chǎn)品:Demonstration Boards 類型:Power Amplifiers 工具用于評估:IR4302 工作電源電壓:13 V to 23 V |
| MAX9766ETJ | 功能描述:音頻放大器 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 |
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