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參數(shù)資料
| 型號： | MAX9851ETM+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 65/71頁 |
| 文件大小： | 0K |
| 描述： | IC CODEC AUDIO STEREO 48TQFN |
| 標準包裝： | 2,500 |
| 類型： | 立體聲音頻 |
| 數(shù)據(jù)接口： | 串行 |
| 分辨率（位）： | 18 b |
| ADC / DAC 數(shù)量： | 2 / 2 |
| 三角積分調(diào)變： | 是 |
| S/N 比，標準 ADC / DAC (db)： | 81.5 / 88 |
| 動態(tài)范圍，標準 ADC / DAC (db)： | 82 / 87.5 |
| 電壓 - 電源，模擬： | 2.6 V ~ 3.3 V |
| 電壓 - 電源，數(shù)字： | 1.7 V ~ 3.3 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 48-WFQFN 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 48-TQFN-EP（7x7） |
| 包裝： | 帶卷 (TR) |
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MAX9851/MAX9853
Stereo Audio CODECs with Microphone, DirectDrive
Headphones, Speaker Amplifiers, or Line Outputs
68
______________________________________________________________________________________
PC Board Layout and Bypassing
Proper layout and grounding are essential for optimum
performance. Use large traces for the power-supply
inputs and amplifier outputs to minimize losses due to
parasitic trace resistance. Large traces also aid in mov-
ing heat away from the package. Proper grounding
improves audio performance, minimizes crosstalk
between channels, and prevents any switching noise
from coupling into the audio signal. Connect AGND,
DGND, CPGND, and PGND (MAX9851 only) together
at a single point on the PC board using the star ground-
ing technique. Route DGND, CPGND, and all traces
that carry switching transients or digital signals sepa-
rately from AGND and analog audio signal paths.
Ground all components associated with the charge
pump to CPGND (CPVSS bypassing and CPVDD
bypassing). Connect all digital I/O termination to DGND
including DVDD and DVDDS2 bypassing. Bypass both
PVDD pins on the MAX9851 (Class D power supplies)
to PGND. Bypass VREF, MBIAS, INTMICBIAS to a quiet
analog ground (AGND).
Connect PVSS and SVSS together at the device and
place the charge-pump capacitors as close to SVSS as
possible. Ensure C2 is connected to CPGND and
bypass CPVDD with 1F to CPGND. Place the bypass
capacitors as close to the device as possible.
The MAX9851/MAX9853 thin QFN package features an
exposed thermal pad on its underside. This pad lowers
the package’s thermal resistance by providing a direct-
heat conduction path from the die to the PC board. If
possible, connect the exposed thermal pad to an elec-
trically isolated, large pad of copper. If it cannot be left
floating, connect it to AGND.
An evaluation kit (EV kit) is available to provide exam-
ple layouts for the MAX9851 and MAX9853. The EV kit
allows quick setup of the MAX9851/MAX9853 and
includes easy-to-use software allowing all internal reg-
isters to be controlled.
Table 46. I2C Register Settings for Stereo Audio Record Mode (continued)
REGISTER (hex)
VALUE (hex)
DESCRIPTION
0x12
0x06
Select the external microphone interface and enable the external
microphone bias circuitry using 2.2k
Ω bias resistors.
0x13
0x00
No configuration necessary
0x14
0x00
No configuration necessary
0x15
0x00
No configuration necessary
0x16
0x00
No configuration necessary
0x17
0x00
No configuration necessary
0x18
0x00
No configuration necessary
0x19
0x00
No configuration necessary
0x1A
0xD5
Enable the MAX9851/MAX9853 and configure the charge-pump circuitry
to run from MCLK (charge pump required to set AOK = 1 and allow
digital circuitry to operate)
0x1B
0x33
Enable the ADC and microphone interface
0x05
0x89
Enable secondary digital audio interface and configure for output
operation at 48kHz stereo audio mode
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX9851EVCMODU | 功能描述:音頻 IC 開發(fā)工具 Evaluation Kit/Evaluation System for the MAX9851 RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評估:TAS5614L 工作電源電壓:12 V to 38 V |
| MAX9851EVKIT | 功能描述:音頻 IC 開發(fā)工具 Evaluation Kit/Evaluation System for the MAX9851 RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評估:TAS5614L 工作電源電壓:12 V to 38 V |
| MAX9853ETM+ | 功能描述:接口—CODEC Stereo Audio CODEC w/DirectDrive Amp RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉(zhuǎn)換速率:48 kSPs 接口類型:I2C ADC 數(shù)量:2 DAC 數(shù)量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel |
| MAX9853ETM+T | 功能描述:接口—CODEC Stereo Audio CODEC w/DirectDrive Amp RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉(zhuǎn)換速率:48 kSPs 接口類型:I2C ADC 數(shù)量:2 DAC 數(shù)量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel |
| MAX9853EVCMODU | 功能描述:音頻 IC 開發(fā)工具 Evaluation Kit/Evaluation System for the MAX9853 RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評估:TAS5614L 工作電源電壓:12 V to 38 V |
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