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參數(shù)資料
| 型號： | LM4921 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Low Voltage I2S 16-Bit Stereo DAC with Stereo Headphone Power Amplifiers and Volume Control |
| 中文描述： | 低電壓的I2S 16位立體聲DAC立體聲耳機功率放大器和音量控制 |
| 文件頁數(shù)： | 12/18頁 |
| 文件大?。?/td> | 849K |
| 代理商： | LM4921 |
Application Information
(Continued)
VOLUME CONTROL
The internal Stereo Volume Control is set by changing bits 7 through 11 in the SPI interface, as shown in table 3 below. The zero
dB setting is for 3V VDD operation and the +3dB is for 5V VDD.
Table 3. Volume Control Settings
Gain (dB)
HP_L & HP_R
-43.5
-42.0
-40.5
-39.0
-37.5
-36.0
-34.5
-33.0
-31.5
-30.0
-28.5
-27.0
-25.5
-24.0
-22.5
-21.0
-19.5
-18.0
-16.5
-15.0
-13.5
-12.0
-10.5
-9.0
-7.5
-6.0
-4.5
-3.0
-1.5
0.0
1.5
3.0
Bit 11
Bit 10
Bit 9
Bit 8
Bit 7
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
BYPASS CHARGE RATE BIT 12
This control pin allows the user to change the Bypass Ca-
pacitor’s charge rate by a factor of two. Setting this bit at
zero will set the circuit to it’s normal 1x rate. Setting the bit to
High will double the charge rate and allow the part to turn on
faster with a slight degradation in turn on click/pop noise.
BITS 5, 13,14, and 15
Bits 13, 14, and 15 are all reserve bits and must be set to
low/zero/ground.
Bit 5 must be set High.
SPI CONTROL INTERFACE BUS (J1)
SPI DATA: This is the serial data pin.
SPI CLK: This is the clock input pin.
SPI ENABLE: This is the SPI enable pin.
L
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM4921ITL | 制造商:Texas Instruments 功能描述:16BIT STEREO DAC + AMP SMD 4921 |
| LM4921ITL/NOPB | 功能描述:音頻放大器 RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| LM4921ITLEVAL | 功能描述:音頻 IC 開發(fā)工具 LM4921ITL EVAL BOARD RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類型:Audio Amplifiers 工具用于評估:TAS5614L 工作電源電壓:12 V to 38 V |
| LM4921ITLX | 制造商:Texas Instruments 功能描述:IC,Audio Amplifier,DUAL,BGA,20PIN,PLASTIC |
| LM4921ITLX/NOPB | 功能描述:音頻放大器 RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
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