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參數(shù)資料
型號(hào)： TLV320DAC3101IRHBR
廠商： TEXAS INSTRUMENTS INC
元件分類： DAC
英文描述： DAC WITH PROGRAMMABLE PLL, PQCC32
封裝： 5 X 5 MM, GREEN, PLASTIC, QFN-32
文件頁(yè)數(shù)： 37/100頁(yè)
文件大小： 1281K
代理商： TLV320DAC3101IRHBR
www.ti.com
SLAS666 – JANUARY 2010
fin = Beep frequency desired
fS = Sample rate
Cycle = Number of beep (sine wave) cycles that are needed
dec2hex = Decimal to hexadecimal conversion function
NOTES:
1. fin should be less than fS/4.
2. For the sine and cosine values, if the number of bits is less than the full 16-bit value, then the unused
MSBs must be written as 0s.
3. For the beep-length values, if number of bits is less than the full 24-bit value, then the unused MSBs
must be written as 0s.
Following the beep-volume control is a digital mixer that mixes in a playback data stream whose level has
already been set by the DAC volume control. Therefore, once the key-click volume level is set, the
key-click volume is not affected by the DAC volume control, which is the main control available to the end
user. This functionality is shown in Figure 1-1.
Following the DAC, the signal can be further scaled by the analog output volume control and
power-amplifier level control.
The beep generator is used for the key-click function. A single beep is generated by writing to page 0 /
register 71, bit D7. After the programmed beep length has finished, register 71, bit D7 is reset back to
zero.
5.5.8
Programming DAC Digital Filter Coefficients
The digital filter coefficients must be programmed through the I2C interface. All digital filtering for the DAC
signal path must be loaded into the RAM before the DAC is powered on. (Note that default ALLPASS filter
coefficients for programmable biquads are located in boot ROM. The boot ROM automatically loads the
default values into the RAM following a hardware reset (toggling the RESET pin) or after a software reset.
After resetting the device, loading boot ROM coefficients into the digital filters requires 100 ms of
programming time. During this time, reading or writing to page 8 through page 15 for updating DAC filter
coefficient values is not permitted. (The DAC should not be powered up until after all of the DAC
configurations have been done by the system microprocessor.)
5.5.9
Updating DAC Digital Filter Coefficients During PLAY
When it is required to update the DAC digital filter coefficients or beep generator during play, care must be
taken to avoid click and pop noise or even a possible oscillation noise. These artifacts can occur if the
DAC coefficients are updated without following the proper update sequence. The correct sequence is
shown in Figure 5-19. The values for times listed in Figure 5-19 are conservative and should be used for
software purposes.
There is also an adaptive mode, in which DAC coefficients can be updated while the DAC is on. For
details, see Section 5.5.1.3.
Copyright 2010, Texas Instruments Incorporated
APPLICATION INFORMATION
41
Product Folder Link(s): TLV320DAC3101
相關(guān)PDF資料
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TLV320DAC3202IYZJT VOLUME CONTROL CIRCUIT, PBGA20
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TLV320DAC3101IRHBT 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC Low-Pwr audio DAC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量: 分辨率:16 bit 接口類型:I2S, UBS 轉(zhuǎn)換速率: 信噪比:98 dB 工作電源電壓:5 V DAC 輸出端數(shù)量:2 工作溫度范圍:- 25 C to + 85 C 電源電流:23 mA 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel
TLV320DAC3120 制造商:TI 制造商全稱:Texas Instruments 功能描述:
TLV320DAC3120_10 制造商:TI 制造商全稱:Texas Instruments 功能描述:Low-Power Mono Audio DAC With Embedded miniDSP and Mono Class-D Speaker Amplifier
TLV320DAC3120EVM-U 功能描述:音頻 IC 開發(fā)工具 TLV320DAC3120EVM-U Eval Mod 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
TLV320DAC3120IRHBR 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC Lo-Pwr Audio DAC w/ Audio Proc RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量: 分辨率:16 bit 接口類型:I2S, UBS 轉(zhuǎn)換速率: 信噪比:98 dB 工作電源電壓:5 V DAC 輸出端數(shù)量:2 工作溫度范圍:- 25 C to + 85 C 電源電流:23 mA 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel
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