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参数资料
| 型号： | MAX9853ETM+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 33/71页 |
| 文件大小： | 0K |
| 描述： | IC CODEC AUDIO STEREO 48TQFN |
| 标准包装： | 43 |
| 类型： | 立体声音频 |
| 数据接口： | 串行 |
| 分辨率（位）： | 18 b |
| ADC / DAC 数量： | 2 / 2 |
| 三角积分调变： | 是 |
| S/N 比，标准 ADC / DAC (db)： | 81.5 / 88 |
| 动态范围，标准 ADC / DAC (db)： | 82 / 87.5 |
| 电压 - 电源，模拟： | 2.6 V ~ 3.3 V |
| 电压 - 电源，数字： | 1.7 V ~ 3.3 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 48-WFQFN 裸露焊盘 |
| 供应商设备封装： | 48-TQFN-EP（7x7） |
| 包装： | 管件 |
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MAX9851/MAX9853
Stereo Audio CODECs with Microphone, DirectDrive
Headphones, Speaker Amplifiers, or Line Outputs
______________________________________________________________________________________
39
Signal Routing
The MAX9851/MAX9853 feature extensive signal-path
mixing, allowing nearly any combination of inputs and
outputs.
DAC Inputs
Use MIXDAL and MIXDAR (register 0x08–see the I2C
Registers and Bit Descriptions section for detailed reg-
ister definitions) to configure the digital mixer at the
input of each DAC. The mixer allows signals from each
digital audio interface to be mixed prior to conversion,
regardless of sampling rate and synchronization. Each
left and right data stream can be routed independently
to either the left or right DAC to allow for swapping of
the left and right channels and any possible combina-
tion of digital signals.
Audio Outputs
Configure MXOUTL and MXOUTR (register 0x0B–see the
I2C Registers and Bit Descriptions section for detailed
register definitions) to adjust the analog output mixer. This
mixer combines signals prior to the analog output stages:
consisting of the headphone amplifier, receiver amplifier,
and speaker or line amplifiers. Each line input, in addition
to the analog sidetone, can be mixed with the left or right
DAC output prior to amplification.
ADC Inputs
Use MXINL and MXINR (register 0x0A–see the I2C
Registers and Bit Descriptions section for detailed reg-
ister definitions) to configure the ADC mixer. Each
ADC has the option of converting the left microphone
signal, the right microphone signal, and each of the
line inputs. This allows for maximum flexibility when
recording input signals.
Charge Pump
The DirectDrive headphone and receiver outputs of the
MAX9851/MAX9853 require a charge pump to create
an internal negative power supply. Set CPEN = 1 (reg-
ister 0x1A, bit B4) to turn on the charge pump. The
negative charge-pump voltage is established and the
audio outputs are ready for use approximately 70ms
after CPEN is set to 1. The state of CPCLK (register
0x1A, bit B0) determines whether the charge-pump
oscillator is derived from the internal 650kHz oscillator
or from the MCLK. Set LFEN = 1, CPEN = 1 and set
CPCLK = 0 (register 0x1A, Bits B5, B4 and B0) to
enable the charge pump using the internal oscillator.
The charge pump runs independent from MCLK when
the internal oscillator is enabled allowing the charge
pump to operate when the DAC is disabled or when
only the line inputs are used. Set CPCLK = 1 to syn-
chronize the charge pump with the MCLK. The switch-
ing frequency of the charge pump is well beyond the
audio range and does not interfere with audio signals.
The switch drivers utilize techniques that minimize
noise generated by turn-on and turn-off transients.
Although not typically required, additional high-fre-
quency noise attenuation can be achieved by increas-
ing the size of C2 and the CPVDD bypass capacitor
(see the Functional Diagrams/Typical Operating Circuits).
Headset Detect
The MAX9851/MAX9853 feature comprehensive head-
set detection to accommodate a wide variety of head-
sets. Two operating modes are provided: one for
wake-up upon headset insertion and one for detecting
the configuration of the headset in use. While in sleep
mode, the detection circuitry can be used to detect the
insertion of a headset and trigger a hardware interrupt.
In this mode, the circuitry can be powered directly from
the battery using minimal power. When a headset is
inserted, the microcontroller (C) can detect the hard-
ware interrupt and bring the system out of low-power
standby. The C can then determine the configuration
of the inserted headset and appropriately configure the
MAX9851/MAX9853. Figure 8 shows the headset
detection circuitry.
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| MAX9851ETM+ | IC CODEC AUDIO STEREO 48TQFN-EP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX9853ETM+ | 功能描述:接口—CODEC Stereo Audio CODEC w/DirectDrive Amp RoHS:否 制造商:Texas Instruments 类型: 分辨率: 转换速率:48 kSPs 接口类型:I2C ADC 数量:2 DAC 数量:4 工作电源电压:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:DSBGA-81 封装:Reel |
| MAX9853ETM+T | 功能描述:接口—CODEC Stereo Audio CODEC w/DirectDrive Amp RoHS:否 制造商:Texas Instruments 类型: 分辨率: 转换速率:48 kSPs 接口类型:I2C ADC 数量:2 DAC 数量:4 工作电源电压:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:DSBGA-81 封装:Reel |
| MAX9853EVCMODU | 功能描述:音频 IC 开发工具 Evaluation Kit/Evaluation System for the MAX9853 RoHS:否 制造商:Texas Instruments 产品:Evaluation Kits 类型:Audio Amplifiers 工具用于评估:TAS5614L 工作电源电压:12 V to 38 V |
| MAX9853EVKIT | 功能描述:音频 IC 开发工具 Evaluation Kit/Evaluation System for the MAX9853 RoHS:否 制造商:Texas Instruments 产品:Evaluation Kits 类型:Audio Amplifiers 工具用于评估:TAS5614L 工作电源电压:12 V to 38 V |
| MAX9856ATL/V+ | 功能描述:接口—CODEC Low-Power Audio Codec With Directdrive. Headphone Amplifiers RoHS:否 制造商:Texas Instruments 类型: 分辨率: 转换速率:48 kSPs 接口类型:I2C ADC 数量:2 DAC 数量:4 工作电源电压:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:DSBGA-81 封装:Reel |
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