参数资料
| 型号： | AT73C213B |
| 厂商： | Atmel |
| 文件页数： | 30/37页 |
| 文件大小： | 0K |
| 描述： | IC PWR MGMT ANALOG PMAAC 32QFN |
| 标准包装： | 260 |
| 应用： | 手持/移动设备 |
| 电流 - 电源： | 6mA |
| 电源电压： | 3 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-VQFN 裸露焊盘 |
| 供应商设备封装： | 32-QFN（7x7） |
| 包装： | 托盘 |
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9. Supplies and Start-up
In operating mode, VBAT (supply of the audio power amplifier) must be between 3V and 5.5V
and AVDD, AVDDHS and VDIG must be inferior or equal to VBAT.
A typical application is VBAT connected to a battery and AVDD, AVDDHS and VDIG supplied by
regulators. VBAT must be present at the same time or before AVDD, AVDDHS and VDIG.
RSTB must be active (0) until the voltages are stable and reach the proper values.
To avoid noise issues, it is recommended to use ceramic decoupling capacitors for each supply
The track of the supplies must be optimized to minimize the resistance, especially on VBAT
where all the current from the power amplifier comes from.
HPN and HPP must be routed symmetrically and the resistance must be minimized.
9.1
9.1.1
9.1.2
9.1.3
30
Audio DAC Start-up Sequences
In order to minimize the noise during the start-up, a specific sequence should be applied.
In any audio configuration, always force Bit 2 to high level (“1”) at 0x0B address.
Power on Example
Path DAC to headset output
1. Write @0x10 => 0x03 (deassert the reset)
2. Write @0x0C => 0xFF (precharge + master on)
3. Write @0x00 => 0x30 (ONLNOL and ONLONOR set to 1)
4. Delay 500 ms
5. Write @0x0C => 0x01 (precharge off + master on)
6. Delay 1ms
7. Write @0x00 => 0x3C (ONLNOL, ONLNOR, ONDACR and ONDACL set to 1)
Power off Example
1. Write @0x00 => 0x30 (ONDACR and ONDACL set to 0)
2. Write @0x0C => 0x00 (master off)
3. Delay 1ms
4. Write @0x00 => 0x00 (all off)
I2S Example
In order to prevent I2S from generating noise at the output (for example a MP3 player switching
from one song to another):
1. Set ONDAC to 0 ((bit 4 and 5 in register @0x00)
2. Stop I2S and MCLK
When I2S is restarted, in order to prevent noise generation at the output:
1. Start MCLK
2. Write @0x10 => 0x07 (RSTMSK=1)
3. Write @0x10 => 0x04 (RESFILZ=0, RSTZ=0)
4. Write @0x10 => 0x07 (RESFILZ=1, RSTZ=1)
AT73C213B
6407A–PMAAC–22-Apr-08
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AT73C213-EK | 功能描述:开发板和工具包 - ARM AT73C213 EVALUATION BOARD RoHS:否 制造商:Arduino 产品:Development Boards 工具用于评估:ATSAM3X8EA-AU 核心:ARM Cortex M3 接口类型:DAC, ICSP, JTAG, UART, USB 工作电源电压:3.3 V |
| AT73C214 | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:Power Management and Battery Charger for Wireless Devices |
| AT73C214J | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:Power Management and Battery Charger for Wireless Devices |
| AT73C221 | 功能描述:其他电源管理 NGD MONOLITHIC NUMERIC IC RoHS:否 制造商:Texas Instruments 输出电压范围: 输出电流:4 mA 输入电压范围:3 V to 3.6 V 输入电流: 功率耗散: 工作温度范围:- 40 C to + 110 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-48 封装:Reel |
| AT73C221-EK | 功能描述:开发板和工具包 - ARM AT73C221 EVALUATION BOARD RoHS:否 制造商:Arduino 产品:Development Boards 工具用于评估:ATSAM3X8EA-AU 核心:ARM Cortex M3 接口类型:DAC, ICSP, JTAG, UART, USB 工作电源电压:3.3 V |
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