- 您现在的位置：买卖IC网 > PDF目录98254 > TLV320AIC3111IRHBT (TEXAS INSTRUMENTS INC) AUDIO AMPLIFIER, PQCC32 PDF资料下载
参数资料
| 型号： | TLV320AIC3111IRHBT |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 音频／视频放大 |
| 英文描述： | AUDIO AMPLIFIER, PQCC32 |
| 封装： | 5 X 5 MM, GREEN, PLASTIC, QFN-32 |
| 文件页数： | 107/156页 |
| 文件大小： | 1701K |
| 代理商： | TLV320AIC3111IRHBT |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页第85页第86页第87页第88页第89页第90页第91页第92页第93页第94页第95页第96页第97页第98页第99页第100页第101页第102页第103页第104页第105页第106页当前第107页第108页第109页第110页第111页第112页第113页第114页第115页第116页第117页第118页第119页第120页第121页第122页第123页第124页第125页第126页第127页第128页第129页第130页第131页第132页第133页第134页第135页第136页第137页第138页第139页第140页第141页第142页第143页第144页第145页第146页第147页第148页第149页第150页第151页第152页第153页第154页第155页第156页
1
0
1
HPF
15
1
N
N z
H
(z)
2
D z
-
+
=
-
1
0
1
LPF
15
1
N
N z
H
(z)
2
D z
-
+
=
-
SLAS644B – JULY 2009 – REVISED OCTOBER 2009
www.ti.com
DRC can be disabled by writing to page 0 / register 68, bits D6–D5.
DRC typically works on the filtered version of the input signal. The input signals have no audio information
at dc and extremely low frequencies; however, they can significantly influence the energy estimation
function in the dynamic range compressor (the DRC). Also, most of the information about signal energy is
concentrated in the low-frequency region of the input signal.
To estimate the energy of the input signal, the signal is first fed to the DRC high-pass filter and then to the
DRC low-pass filter. These filters are implemented as first-order IIR filters given by
(6)
(7)
The coefficients for these filters are 16 bits wide in 2s-complement format and are user-programmable
through register write as given in Table 5-33.
Table 5-33. The DRC HPF and LPF Coefficients
Coefficient
Location
HPF N0
C71 page 9 / register 14 and page 9 / register 15
HPF N1
C72 page 9 / registers 16 and page 9 / register 17
HPF D1
C73 page 9 / registers 18 and page 9 / register 19
LPF N0
C74 page 9 / registers 20 and page 9 / register 21
LPF N1
C75 page 9 / registers 22 and page 9 / register 23
LPF D1
C76 page 9 / registers 24 and page 9 / register 25
The default values of these coefficients implement a high-pass filter with a cutoff at 0.00166 × DAC_fS,
and a low-pass filter with a cutoff at 0.00033 × DAC_fS.
The output of the DRC high-pass filter is fed to the processing block selected for the DAC channel. The
absolute value of the DRC LPF filter is used for energy estimation within the DRC.
The gain in the DAC digital volume control is controlled by page 0 / register 65 and page 0 / register 66.
When the DRC is enabled, the applied gain is a function of the digital volume control register setting and
the output of the DRC.
The DRC parameters are described in sections that follow.
5.6.4.1
DRC Threshold
DRC threshold represents the level of the DAC playback signal at which the gain compression becomes
active. The output of the digital volume control in the DAC is compared with the set threshold. The
threshold value is programmable by writing to page 0 / register 68, bits D4–D2. The threshold value can
be adjusted between –3 dBFS and –24 dBFS in steps of 3 dB. Keeping the DRC threshold value too high
may not leave enough time for the DRC block to detect peaking signals, and can cause excessive
distortion at the outputs. Keeping the DRC threshold value too low can limit the perceived loudness of the
output signal.
The recommended DRC threshold value is –24 dB.
When the output signal exceeds the set DRC threshold, the interrupt flag bits at page 0 / register 44,
bits D3–D2 are updated. These flag bits are sticky in nature, and are reset only after they are read back
by the user. The non-sticky versions of the interrupt flags are also available at page 0 / register 46,
bits D3–D2.
54
APPLICATION INFORMATION
Copyright 2009, Texas Instruments Incorporated
Product Folder Link(s): TLV320AIC3111
相关PDF资料 |
PDF描述 |
|---|---|
| TLV320AIC3111IRHBR | AUDIO AMPLIFIER, PQCC32 |
| TLV320AIC3120IRHBR | AUDIO AMPLIFIER, PQCC32 |
| TLV320AIC3120IRHBT | AUDIO AMPLIFIER, PQCC32 |
| TLV320AIC31IRHBRG4 | SPECIALTY CONSUMER CIRCUIT, PQCC32 |
| TLV320AIC31IRHBR | SPECIALTY CONSUMER CIRCUIT, PQCC32 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TLV320AIC3120 | 制造商:TI 制造商全称:Texas Instruments 功能描述:Low-Power Mono Audio Codec With Embedded miniDSP and Mono Class-D Speaker Amplifier |
| TLV320AIC3120EVM-U | 功能描述:音频 IC 开发工具 TLV320AIC3120EVM-U Eval Mod RoHS:否 制造商:Texas Instruments 产品:Evaluation Kits 类型:Audio Amplifiers 工具用于评估:TAS5614L 工作电源电压:12 V to 38 V |
| TLV320AIC3120IRHBR | 功能描述:接口—CODEC Low-Pwr Audio CODEC 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 |
| TLV320AIC3120IRHBT | 功能描述:接口—CODEC Low-Pwr Audio CODEC 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 |
| TLV320AIC31EVM | 功能描述:音频 IC 开发工具 TLV320AIC31 Eval Mod RoHS:否 制造商:Texas Instruments 产品:Evaluation Kits 类型:Audio Amplifiers 工具用于评估:TAS5614L 工作电源电压:12 V to 38 V |
发布紧急采购，3分钟左右您将得到回复。