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| 型号： | TLV320AIC24KIPFBRG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP48 |
| 封装： | GREEN, PLASTIC, TQFP-48 |
| 文件页数： | 40/52页 |
| 文件大小： | 981K |
| 代理商： | TLV320AIC24KIPFBRG4 |
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Layout and Grounding Guidelines for TLV320AIC2x
TLV320AIC2x-to-DSP Interface
DX
DR
FSX
FSR
CLKX
CLKR
TMS320C54X
TMS320C6X
FS
SCLK
TLV320AIC20
MCLK
DIN
DOUT
M/S
IOVDD
From
Oscillator
Hybrid Circuit External Connections
TLV320AIC20, TLV320AIC21
TLV320AIC24, TLV320AIC25
TLV320AIC20K, TLV320AIC24K
SLAS363D – MARCH 2002 – REVISED APRIL 2005
TLV320AIC2x has a built-in analog antialias filter, which provides rejection to external noise at high frequencies
that may couple into the device. Digital filters with high out-of-band attenuation also reject the external noise. If
the differential inputs are used for the ADC channel, then the noise in the common-mode signal is also rejected
by the high CMRR of TLV320AIC2x. Using external common-mode for microphone inputs also helps reject the
external noise. However to extract the best performance from TLV320AIC2x, care must be taken in board design
and layout to avoid coupling of external noise into the device.
TLV320AIC2x supports clock frequencies as high as 100 MHz. To avoid coupling of fast switching digital signals
to analog signals, the digital and analog sections should be separated on the board. In TLV320AIC2x the digital
and analog pins are kept separated to aid such a board layout. A separate analog ground plane must be used for
the analog section of the board. The analog and digital ground planes should be shorted at only one place as
close to TLV320AIC2x as possible. No digital trace should run under TLV320AIC2x to avoid coupling of external
digital noise into the device. It is suggested to have the analog ground plane running below the TLV320AIC2x.
The power-supplies must be decoupled close to the supply pins, preferably, with 0.1 F ceramic capacitor and
10 F tantalum capacitor following. The ground pin must be connected to the ground plane as close as possible
to the TLV320AIC2x, so as to minimize any inductance in the path. Since the MCLK is expected to be a very
high frequency signal, it is advisable to shield it with digital ground. For best performance of ADC in differential
input mode, the differential signals must be routed close to each other in similar fashion, so that the noise
coupling on both the signals is the same and can be rejected by the device.
Extra care has to be taken for the speaker driver outputs, as any trace resistance can cause a reduction in the
maximum swing that can be seen at the speaker.
The TLV320AIC2x interfaces gluelessly to the McBSP port of a C54x or C6x TI DSP. Figure 34 shows a single
TLV320AIC2x connected to a C54x or C6x TI DSP.
Figure 34. TLV320AIC2xs Interface to McBSP Port of C54x or C6x DSP
The TLV320AIC2x connected to the telephone line using the LINEI and LINEO hybrid circuit is shown in
45
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TLV320AIC25 | 制造商:TI 制造商全称:Texas Instruments 功能描述:PRODUCT NOTIFICATION |
| TLV320AIC25C | 制造商:TI 制造商全称:Texas Instruments 功能描述:Layout and Grounding Guidelines for TLV320AIC2x |
| TLV320AIC25CPFB | 功能描述:接口—CODEC Low Power Low IOVdd Dual Channel 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 |
| TLV320AIC25CPFBG4 | 功能描述:接口—CODEC 512 x 18 3.3-V Synch FIFO Memory 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 |
| TLV320AIC25CPFBR | 功能描述:接口—CODEC Low Power Low IOVdd Dual Channel 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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