- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄98254 > TLV320AIC31IRHBTG4 (TEXAS INSTRUMENTS INC) SPECIALTY CONSUMER CIRCUIT, PQCC32 PDF資料下載
參數(shù)資料
| 型號(hào)： | TLV320AIC31IRHBTG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQCC32 |
| 封裝： | 5 X 5 MM, GREEN, PLASTIC, QFN-32 |
| 文件頁數(shù)： | 26/83頁 |
| 文件大小： | 1197K |
| 代理商： | TLV320AIC31IRHBTG4 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁當(dāng)前第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁
ANALOG OUTPUT COMMON-MODE ADJUSTMENT
AUDIO DAC POWER CONTROL
AUDIO ANALOG INPUTS
SLAS497C – AUGUST 2006 – REVISED DECEMBER 2008 ............................................................................................................................................. www.ti.com
The output common-mode voltage and output range of the analog output are determined by an internal bandgap
reference, in contrast to other codecs that may use a divided version of the supply. This scheme is used to
reduce the coupling of noise that may be on the supply (such as 217-Hz noise in a GSM cellphone) into the
audio signal path.
However, due to the possible wide variation in analog supply range (2.7 V to 3.6 V), an output common-mode
voltage setting of 1.35 V, which would be used for a 2.7 V supply case, will be overly conservative if the supply is
actually much larger, such as 3.3 V or 3.6 V. In order to optimize device operation, the TLV320AIC31 includes a
programmable output common-mode level, which can be set by register programming to a level most appropriate
to the actual supply range used by a particular customer. The output common-mode level can be varied among
four different values, ranging from 1.35 V (more appropriate for low supply ranges, near 2.7 V) to 1.8 V (more
appropriate for high supply ranges, near 3.6 V). Note that there is also some limitation on the range of DVDD
voltage as well in determining which setting is most appropriate.
Table 4. Appropriate Settings
CM SETTING
RECOMMENDED AVDD, DRVDD
RECOMMENDED DVDD
1.35
2.7 V to 3.6 V
1.65 V to 1.95 V
1.50
3.0 V to 3.6 V
1.65 V to 1.95 V
1.65 V
3.3 V to 3.6 V
1.8 V to 1.95 V
1.8 V
3.6 V
1.95 V
The stereo DAC can be fully powered up or down, and in addition, the analog circuitry in each DAC channel can
be powered up or down independently. This provides power savings when only a mono playback stream is
needed.
The TLV320AIC31 includes six analog audio input pins, which can be configured as two fully-differential pair plus
one single-ended pair of audio inputs, or four single-ended audio inputs. These six pins connect through series
resistors and switches to the virtual ground terminals of two fully differential opamps (one per ADC/PGA
channel). By selecting to turn on only one set of switches per opamp at a time, the inputs can be effectively
muxed to each ADC PGA channel
By selecting to turn on multiple sets of switches per op amp at a time, mixing can also be achieved. However,
single-ended and fully-differential audio inputs cannot be mixed into the same ADC PGA at the same time.
Mixing of multiple inputs can easily lead to PGA outputs that exceed the range of the internal opamps, resulting
in saturation and clipping of the mixed output signal. Whenever mixing is being implemented, the user should
take adequate precautions to avoid such a saturation case from occurring. In general, the mixed signal should
not exceed 2VPP single-ended or 4VPP fully-differential.
In most mixing applications, there is also a general need to adjust the levels of the individual signals being
mixed. For example, if a soft signal and a large signal are to be mixed and played together, the soft signal
generally should be amplified to a level comparable to the large signal before mixing. In order to accommodate
this need, the TLV320AIC31 includes input level control on each of the individual inputs before they are mixed or
muxed into the ADC PGAs, with gain programmable from 0 dB to –12 dB in 1.5-dB steps. Note that this input
level control is not intended to be a volume control, but instead used occasionally for level setting. Soft-stepping
of the input level control settings is implemented in this device, with the speed and functionality following the
settings used by the ADC PGA for soft-stepping.
The TLV320AIC31 supports the ability to mix up to two fully-differential analog inputs into each ADC PGA
channel. Figure 27 shows the mixing configuration for the left channel, which can mix the signals IN1LP-IN1LM
and IN1RP-IN1RM.
32
Copyright 2006–2008, Texas Instruments Incorporated
Product Folder Link(s): TLV320AIC31
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TLV320AIC31IRHBT | SPECIALTY CONSUMER CIRCUIT, PQCC32 |
| TLV320AIC3253IRGER | SPECIALTY CONSUMER CIRCUIT, PQCC24 |
| TLV320AIC3253IRGET | SPECIALTY CONSUMER CIRCUIT, PQCC24 |
| TLV320AIC3253IYZKR | SPECIALTY CONSUMER CIRCUIT, BGA25 |
| TLV320AIC3253IYZKT | SPECIALTY CONSUMER CIRCUIT, BGA25 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TLV320AIC32 | 制造商:BB 制造商全稱:BB 功能描述:LOW POWER STEREO AUDIO CODEC FOR PORTABLE AUDIO/TELEPHONY |
| TLV320AIC32_07 | 制造商:BB 制造商全稱:BB 功能描述:LOW POWER STEREO AUDIO CODEC FOR PORTABLE AUDIO/TELEPHONY |
| TLV320AIC3204 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Ultra Low Power Stereo Audio Codec |
| TLV320AIC3204EVM-K | 功能描述:音頻 IC 開發(fā)工具 TLV320AIC3204 Eval Kit RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評(píng)估:TAS5614L 工作電源電壓:12 V to 38 V |
| TLV320AIC3204IRHBR | 功能描述:接口—CODEC Very LW PWR Stereo Audio CODEC/TuneTM 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(fēng)格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。