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| 型号： | TAS5711PHPR |
| 厂商： | Texas Instruments |
| 文件页数： | 30/66页 |
| 文件大小： | 0K |
| 描述： | IC AMP AUD DGTL 20W 2CH 48HTQFP |
| 标准包装： | 1 |
| 类型： | D 类 |
| 输出类型： | 2 通道（立体声，2.1）或 4 通道（四路） |
| 在某负载时最大输出功率 x 通道数量： | 21W x 2 @ 8 欧姆 |
| 电源电压： | 8 V ~ 26 V |
| 特点： | 消除爆音，数字输入，I²C，I²S，静音，短路和热保护，关机，音量控制 |
| 安装类型： | 表面贴装 |
| 供应商设备封装： | 48-HTQFP（7x7） |
| 封装/外壳： | 48-TQFP 裸露焊盘 |
| 包装： | 标准包装 |
| 产品目录页面： | 860 (CN2011-ZH PDF) |
| 其它名称： | 296-25564-6 |
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2
Bit
–23
S_xx.xxxx_xxxx_xxxx_xxxx_xxxx_xxx
2
Bit
–5
2
Bit
–1
2 Bit
0
SignBit
2 Bit
1
M0125-01
SLOS600A – DECEMBER 2009 – REVISED AUGUST 2010
www.ti.com
BANK SWITCHING
The TAS5711 uses an approach called bank switching together with automatic sample-rate detection. All
processing features that must be changed for different sample rates are stored internally in three banks. The
user can program which sample rates map to each bank. By default, bank 1 is used in 32kHz mode, bank 2 is
used in 44.1/48 kHz mode, and bank 3 is used for all other rates. Combined with the clock-rate autodetection
feature, bank switching allows the TAS5711 to detect automatically a change in the input sample rate and switch
to the appropriate bank without any MCU intervention.
An external controller configures bankable locations (0x29-0x36, 0x3A-0x3F, and 0x58-0x5F) for all three banks
during the initialization sequence.
If auto bank switching is enabled (register 0x50, bits 2:0) , then the TAS5711 automatically swaps the coefficients
for subsequent sample rate changes, avoiding the need for any external controller intervention for a sample rate
change.
By default, bits 2:0 have the value 000; indicating that bank switching is disabled. In that state, updates to
bankable locations take immediate effect. A write to register 0x50 with bits 2:0 being 001, 010, or 011 brings the
system into the coefficient-bank-update state update bank1, update bank2, or update bank3, respectively. Any
subsequent write to bankable locations updates the coefficient banks stored outside the DAP. After updating all
the three banks, the system controller should issue a write to register 0x50 with bits 2:0 being 100; this changes
the system state to automatic bank switching mode. In automatic bank switching mode, the TAS5711
automatically swaps banks based on the sample rate.
Command sequences for updating DAP coefficients can be summarized as follows:
1.
Bank switching disabled (default): DAP coefficient writes take immediate effect and are not
influenced by subsequent sample rate changes.
OR
Bank switching enabled:
(a)
Update bank-1 mode: Write "001" to bits 2:0 of reg 0x50. Load the 32 kHz coefficients.
(b)
Update bank-2 mode: Write "010" to bits 2:0 of reg 0x50. Load the 48 kHz coefficients.
(c)
Update bank-3 mode: Write "011" to bits 2:0 of reg 0x50. Load the other coefficients.
(d)
Enable automatic bank switching by writing "100" to bits 2:0 of reg 0x50.
26-Bit 3.23 Number Format
All mixer gain coefficients are 26-bit coefficients using a 3.23 number format. Numbers formatted as 3.23
numbers means that there are 3 bits to the left of the decimal point and 23 bits to the right of the decimal point.
This is shown in Figure 54 .
Figure 54. 3.23 Format
36
Copyright 2009–2010, Texas Instruments Incorporated
Product Folder Link(s): TAS5711
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相关代理商/技术参数 |
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|---|---|
| TAS5713 | 制造商:TI 制造商全称:Texas Instruments 功能描述:25-W DIGITAL AUDIO POWER AMPLIFIER WITH EQ AND DRC |
| TAS5713_10 | 制造商:TI 制造商全称:Texas Instruments 功能描述:25-W DIGITAL AUDIO POWER AMPLIFIER WITH EQ AND DRC |
| TAS5713_101 | 制造商:TI 制造商全称:Texas Instruments 功能描述:25-W DIGITAL AUDIO POWER AMPLIFIER WITH EQ AND DRC |
| TAS5713PHP | 功能描述:音频放大器 Digital Audio Power Amp RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| TAS5713PHP | 制造商:Texas Instruments 功能描述:Audio Power Amplifier IC 制造商:Texas Instruments 功能描述:IC, AUDIO PWR AMP, CLASS D, 25W HTQFP-48 |
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