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参数资料
| 型号： | TLV320AIC26IRHBG4 |
| 厂商： | Texas Instruments, Inc. |
| 元件分类： | Codec |
| 英文描述： | LOW POWER STEREO AUDIO CODEC WITH HEADPHONE/SPEAKER AMPLIFIER AND 12-BIT BATTERY / TEMPERATURE / AUXILIARY ADC |
| 中文描述： | 低功耗立体声音频编解码器耳机/扬声器放大器和12位电池/温度/辅助ADC |
| 文件页数： | 47/74页 |
| 文件大小： | 896K |
| 代理商： | TLV320AIC26IRHBG4 |
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TLV320AIC26
SLAS412 DECEMBER 2003
www.ti.com
51
REGISTER 1EH: Audio Control 5
BIT
NAME
READ/
WRITE
RESET
VALUE
FUNCTION
D15D9
MAX_AGC_PGA
R/W
1111111
MAX Input Gain Applicable for AGC
0000000 => 0 dB
0000001 => 0.5 dB
0000010 => 1.0 dB
1110110 => 59.0 dB
1110111 => 59.5 dB
1111000 => 59.5 dB
1111111 => 59.5 dB
D8D6
AGC_NOI_DEB
R/W
000
AGC Debounce Time for Speech Mode to Silence Mode Transition
000 => 0 ms
001 => 0.5 ms
010 => 1.0 ms
110 => 16.0 ms
111 => 32.0 ms
D5D3
AGC_SIG_DEB
R/W
000
AGC Debounce Time for Silence Mode to Speech Mode Transition
000 => 0 ms
001 => 0.5 ms
010 => 1.0 ms
110 => 16.0 ms
111 => 32.0 ms
D2
DRV_POP_DIS
R/W
0
Audio Output Driver POP Reduction Enable
0 => Enabled
1 => Disabled
D1
DRV_POP_LEN
R/W
0
Audio Output Driver POP Reduction Duration
0 => Output driver ramps to final voltage in approximately 0.8 sec, if VGND is
powered down (1 msec otherwise).
1 => Output driver ramps to final voltage in approximately 4 sec, if VGND is powered
down (1 msec otherwise).
D0
Reserved
R
0
Reserved. Do not write 1 to this location.
LAYOUT
The following layout suggestions should provide optimum performance from the ’AIC26. However, many portable
applications have conflicting requirements concerning power, cost, size, and weight. In general, most portable devices
have fairly clean power and grounds because most of the internal components are very low power. This situation means
less bypassing for the converter power and less concern regarding grounding. Still, each situation is unique and the
following suggestions should be reviewed carefully.
For optimum performance, care must be taken with the physical layout of the ’AIC26 circuitry. The SAR architecture of the
auxiliary converter is sensitive to glitches or sudden changes on the power supply, reference, ground connections, and
digital inputs that occur just prior to latching the output of the analog comparator. Therefore, during any single conversion
for an n-bit SAR converter, there are n windows in which large external transient voltages can easily affect the conversion
result. Such glitches might originate from switching power supplies, nearby digital logic, and high power devices. The
degree of error in the digital output depends on the reference voltage, layout, and the exact timing of the external event.
The error can change if the external event changes in time with respect to the timing of the critical n windows.
With this in mind, power to the ’AIC26 must be clean and well bypassed. A 0.1-
F ceramic bypass capacitor must be placed
as close to the device as possible. A 1-
F to 10-F capacitor may also be needed if the impedance between the ’AIC26
supply pins and the system power supply is high.
A bypass capacitor on the VREF pin is generally not needed because the reference is buffered by an internal op amp,
although it can be useful to reduce reference noise level. If an external reference voltage originates from an op amp, make
sure that it can drive any bypass capacitor that is used without oscillation.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TLV320AIC26IRHBR | 功能描述:接口—CODEC Lo-Pwr Stereo 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 |
| TLV320AIC26IRHBRG4 | 功能描述:接口—CODEC Lo-Pwr Stereo 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 |
| TLV320AIC27 | 制造商:TI 制造商全称:Texas Instruments 功能描述:STEREO AUDIO CODEC |
| TLV320AIC27CPFB | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Texas Instruments 功能描述: |
| TLV320AIC27IPFB | 制造商:TI 制造商全称:Texas Instruments 功能描述:STEREO AUDIO CODEC |
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