- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄98253 > TLV320AIC28IRGZRG4 (TEXAS INSTRUMENTS INC) SPECIALTY CONSUMER CIRCUIT, PQCC48 PDF資料下載
參數(shù)資料
| 型號： | TLV320AIC28IRGZRG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQCC48 |
| 封裝： | 7 X 7 MM, GREEN, PLASTIC, QFN-48 |
| 文件頁數(shù)： | 20/85頁 |
| 文件大小： | 1053K |
| 代理商： | TLV320AIC28IRGZRG4 |
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頁當(dāng)前第20頁第21頁第22頁第23頁第24頁第25頁第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頁第84頁第85頁
TLV320AIC28
SLAS418B FEBRUARY 2004 REVISED MAY 2005
www.ti.com
27
DAC Powerdown
The DAC powerdown flag (D4D3 of control register 05H/page 2) along with D10 of control register 05H/page
2 denotes the powerdown status of the DAC according to Table 2.
Table 2. DAC Powerdown Status
D10, D4, D3
POWERUP/POWERDOWN STATE OF DAC
0,0,0
DAC left and right are in stable powerup state.
0,0,1
DAC left is in stable powerup state.
DAC right is in the process of powering up. The length of this state is determined by PLL and output driver powerup delays
controlled by register programming.
0,1,0
DAC left is in the process of powering up. The length of this state is determined by PLL and output driver powerup delays
controlled by register programming.
DAC right is in stable powerup state.
0,1,1
DAC left and right are in the process of powering up. The length of this state is determined by PLL and output driver
powerup delays controlled by register programming.
1,0,0
DAC left and right are in the process of powering down. The length of this state is determined by softstepping of volume
control block.
1,0,1
DAC left is in the process of powering down. The length of this state is determined by softstepping of volume control block.
DAC right is in stable powerdown state.
1,1,0
DAC left is in stable powerdown state.
DAC right is in the process of powering down. The length of this state is determined by softstepping of volume control
block.
1,1,1
DAC left and right are in stable powerdown state.
Analog Outputs
The AIC28 has the capability to route the DAC output to any of the selected analog outputs. The AIC28 provides
various analog routing capabilities. All analog outputs other than the selected ones are powered down for
optimal power consumption.
D Headphone Drivers
The AIC28 features stereo headphone drivers (SPK1 and SPK2) that can deliver 44 mW per channel at 3.3-V
supply, into 16-
loads. The AIC28 provides flexibility to connect either of the DAC channels to either of the
headphone driver outputs. It also allows mixing of signals from different DAC channels. The headphones can
be connected in a single ended configuration using ac-coupling capacitors, or the capacitors can be removed
and virtual ground (VGND) powered for a cap-less output connection. Note that the VGND amplifier must be
powered up if the cap-less configuration is used.
In the case of an ac-coupled output, the value of the capacitors is typically chosen based on the amount of
lowfrequency cut that can be tolerated. The capacitor in series with the load impedance forms a high-pass
filter with –3 dB cutoff frequency of 1/(2
πRC) in Hz, where R is the impedance of the headphones. Use of an
overly small capacitor reduces low-frequency components in the signal output and lead to low-quality audio.
When driving 16-
headphones, capacitors of 220-F (a commonly used value) result in a high-pass filter cutoff
frequency of 45 Hz, although reducing these capacitors to 50
F results in a cutoff frequency of 199 Hz, which
is generally considered noticeable when playing music. The cutoff frequency is reduced to half of the above
values if 32-
headphones are used instead of 16-.
The AIC28 programmable digital effects block can be used to help reduce the size of capacitors needed by
implementing a low frequency boost function to help compensate for the high-pass filter introduced by the
ac-coupling capacitors. For example, by using 50-
F capacitors and setting the AIC28 programmable filter
coefficients as shown below, the frequency response can be improved as shown in Figure 21.
Filter coefficients (use the same for both channels):
N0 = 32767, N1 = 32346, N2 = 31925, N3 = 32767, N4 = 0, N5 = 0
D0 = 32738, D1 = 32708, D4 = 0, D5 =0
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TLV320AIC28RGZR | SPECIALTY CONSUMER CIRCUIT, PQCC48 |
| TLV320AIC28RGZ | SPECIALTY CONSUMER CIRCUIT, PQCC48 |
| TLV320AIC28IRGZG4 | SPECIALTY CONSUMER CIRCUIT, PQCC48 |
| TLV320AIC29IRGZRG4 | SPECIALTY CONSUMER CIRCUIT, PQCC48 |
| TLV320AIC29IRGZR | SPECIALTY CONSUMER CIRCUIT, PQCC48 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TLV320AIC28RGZ | 制造商:TI 制造商全稱:Texas Instruments 功能描述:STEREO AUDIO CODEC WITH INTERGRATED HEADPHONE AND SPEAKER AMPLIFIERS |
| TLV320AIC28RGZR | 制造商:TI 制造商全稱:Texas Instruments 功能描述:STEREO AUDIO CODEC WITH INTERGRATED HEADPHONE AND SPEAKER AMPLIFIERS |
| TLV320AIC29 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:STEREO AUDIO CODEC WITH INTEGRATED HEADPHONE AND SPEAKER AMPLIFIERS |
| TLV320AIC29_07 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:STWREO AUDIO CODEC WITH INTERGRATED HEADPHONE AND SPEAKER AMPLIFIERS |
| TLV320AIC29_08 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:STEREO AUDIO CODEC WITH INTEGRATED HEADPHONE AND SPEAKER AMPLIFIERS |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。