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參數資料
| 型號： | TLV320DAC32IRHBRG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | DAC |
| 英文描述： | SERIAL INPUT LOADING, DAC WITH PROGRAMMABLE PLL, PQCC32 |
| 封裝： | 5 X 5 MM, GREEN, PLASTIC, QFN-32 |
| 文件頁數： | 26/69頁 |
| 文件大小： | 1242K |
| 代理商： | TLV320DAC32IRHBRG4 |
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AUDIO ANALOG INPUTS
ANALOG INPUT BYPASS PATH FUNCTIONALITY
MICBIAS GENERATION
ANALOG HIGH POWER OUTPUT DRIVERS
SLAS506B – NOVEMBER 2006 – REVISED DECEMBER 2008........................................................................................................................................ www.ti.com
The TLV320DAC32 includes two single-ended audio inputs that are sent to an output mixer with volume control
capability. By configuring the mixer to accept multiple inputs, an analog mixing function occurs. Mixing of multiple
mixer inputs can easily lead to outputs that exceed the range of the internal opamps, thereby resulting in
saturation and clipping of the mixed output signal. Note that whenever mixing is being implemented, the user
should take adequate precautions to avoid such a saturation case from occurring. In general, the analog mixed
signal should not exceed 2Vp-p (single-ended).
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 TLV320DAC32 includes input volume control on each of the individual inputs before they are
mixed, with gain programmable from 0dB to -78dB in 0.5dB steps. Soft-stepping of the input level control settings
is implemented in this device, with the speed and functionality following the settings used by the DAC.
The TLV320DAC32 includes the additional ability to route two analog input signals around the DAC and then
connect to the output drivers. This capability is useful in a cellphone, for example, when a separate FM radio
device provides a stereo analog output signal that needs to be routed to headphones. The TLV320DAC32
supports this in a low power mode by providing a direct analog path through the device to the output drivers,
while the DACS can be completely powered down to save power. When programmed correctly, the device can
connect the analog input signals LINEL and LINER through the volume control which is connected to the output
stage.
The TLV320DAC32 includes a programmable microphone bias output voltage (MICBIAS), capable of providing
output voltages of 2.0V or 2.5V (both derived from the on-chip bandgap voltage) with 4mA output current drive.
In addition, the MICBIAS may be programmed to be switched to AVDD_DAC directly through an on-chip switch,
or it can be powered down completely when not needed, for power savings. This function is controlled by register
programming in Page-0/Reg-25.
The TLV320DAC32 includes four high power output drivers with extensive flexibility in their usage. These output
drivers are individually capable of driving 40mW each into a 16-
load in single-ended configuration, and they
can be used in pairs to drive up to 325mW into an 8-
load connected in bridge-terminated load (BTL)
configuration between two driver outputs.
The high power output drivers can be configured in a variety of ways, including:
driving up to two fully differential output signals
driving up to four single-ended output signals
driving two single-ended output signals, with one or two of the remaining drivers driving a fixed VCM level, for
a pseudo-differential stereo output
driving one or two 8- speakers connected BTL between pairs of driver output pins
driving stereo headphones in single-ended configuration with two drivers, while the remaining two drivers are
connected in BTL configuration to an 8-
speaker
The output stage architecture with the volume control and mixing blocks leading to the high power output drivers
is shown in Figure 34. Note that each of these drivers have a output level control which allows gain adjustments
up to +9dB on the output signal. Note that this output level adjustment is not intended to be used as a standard
volume control, but instead is included for additional full-scale output signal level control.
The output drivers, HPROUT and HPLOUT, include a direct connection path (L/R DAC_Direct) between the
stereo DAC outputs and the output drivers. This pathway allows bypassing of the analog volume controls and the
mixing networks. This functionality provides the highest quality DAC playback performance while reducing power
dissipation, but this mode can only be utilized if the DAC output does not need to be mixed with the external
analog input signals.
32
Copyright 2006–2008, Texas Instruments Incorporated
Product Folder Link(s): TLV320DAC32
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相關代理商/技術參數 |
參數描述 |
|---|---|
| TLV320DAC32IRHBT | 功能描述:音頻數/模轉換器 IC Low Power Stereo DAC RoHS:否 制造商:Texas Instruments 轉換器數量: 分辨率:16 bit 接口類型:I2S, UBS 轉換速率: 信噪比:98 dB 工作電源電壓:5 V DAC 輸出端數量:2 工作溫度范圍:- 25 C to + 85 C 電源電流:23 mA 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel |
| TLV320DAC32IRHBTG4 | 功能描述:音頻數/模轉換器 IC Low Power Stereo DAC RoHS:否 制造商:Texas Instruments 轉換器數量: 分辨率:16 bit 接口類型:I2S, UBS 轉換速率: 信噪比:98 dB 工作電源電壓:5 V DAC 輸出端數量:2 工作溫度范圍:- 25 C to + 85 C 電源電流:23 mA 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel |
| TLV320DAC33NIZQC | 制造商:Texas Instruments 功能描述: |
| TLV320DAC33NIZQCR | 制造商:Texas Instruments 功能描述: |
| TLV320VD30 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:VDSL CODEC |
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