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參數(shù)資料
| 型號： | TLV320AIC3253IYZKT |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, BGA25 |
| 封裝： | 2.70 X 2.70 MM, LEAD FREE, WCSP-25 |
| 文件頁數(shù)： | 13/35頁 |
| 文件大?。?/td> | 738K |
| 代理商： | TLV320AIC3253IYZKT |
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SLOS631 – MARCH 2010
www.ti.com
Analog Low Power Bypass
The TLV320AIC3253 offers an analog-bypass mode. An analog signal can be routed from the analog input pin to
the output amplifier. Neither the digital-input processing blocks nor the DAC resources are required for such
operation; this supports low-power operation during analog-bypass mode.
In analog low-power bypass mode, line-level signals can be routed directly from the analog inputs INL to the left
headphone amplifier (HPL) and INR to HPR.
Headphone Outputs
The stereo headphone drivers on pins HPL and HPR can drive loads with impedances down to 16
in
single-ended AC-coupled headphone configurations, or loads down to 32
in differential mode, where a speaker
is connected between HPL and HPR. In single-ended drive configuration these drivers can drive up to 15mW
power into each headphone channel while operating from 1.8V analog supplies. While running from the AVdd
supply, the output common-mode of the headphone driver is set by the common-mode setting of analog inputs to
allow maximum utilization of the analog supply range while simultaneously providing a higher output-voltage
swing. In cases when higher output-voltage swing is required, the headphone amplifiers can run directly from the
higher supply voltage on LDOIN input (up to 3.6V). To use the higher supply voltage for higher output signal
swing, the output common-mode can be adjusted to either 1.25V, 1.5V or 1.65V. When the common-mode
voltage is configured at 1.65V and LDOIN supply is 3.3V, the headphones can each deliver up to 40mW power
into a 16
load.
The headphone drivers are capable of driving a mixed combination of DAC signal and bypass from analog input
INL and INR. The analog input signals can be attenuated up to 72dB before routing. The level of the DAC signal
can be controlled using the digital volume control of the DAC. To control the output-voltage swing of headphone
drivers, the digital volume control provides a range of –6.0dB to +29.0dB(6) in steps of 1dB. These level controls
are not meant to be used as dynamic volume control, but more to set output levels during initial device
configuration. Refer to for recommendations for using headphone volume control for achieving 0dB gain through
the DAC channel with various configurations.
ADC / Digital Microphone Interface
The TLV320AIC3253 includes a stereo recording path, which accepts PDM signals from digital microphones.
This path has the digital functionality of a high-performance audio ADC, but the analog functions such as
microphone preamplifier and delta-sigma modulator are provided by one or two external digital microphones.
This device is functionally and software compatible with other audio converters in this family. For consistency
with other documents, this path is called an "ADC" in this document even though it does not have the core
analog-to-digital conversion functions. The ADC supports sampling rates from 8kHz to 192kHz. In order to
provide optimal system power management, the stereo recording path can be powered up one channel at a time,
to support the case where only mono record capability is required.
The ADC path of the TLV320AIC3253 features a large set of options for signal conditioning as well as signal
routing:
2 ADCs (PDM input)
Fine gain adjust of digital channels with 0.1 dB step size
Digital volume control with a range of -12 to +20dB
Mute function
In addition to the standard set of ADC features the TLV320AIC3253 also offers the following special functions:
Built in microphone bias
Stereo digital microphone interface
Channel-to-channel phase adjustment
Adaptive filter mode
(6)
If the device must be placed into 'mute' from the –6.0dB setting, set the device at a gain of –5.0dB first, then place the device into mute.
20
Copyright 2010, Texas Instruments Incorporated
Product Folder Link(s): TLV320AIC3253
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TLV320AIC3254 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Ultra Low Power Stereo Audio Codec With Embedded miniDSP |
| TLV320AIC3254_09 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Ultra Low Power Stereo Audio Codec With Embedded miniDSP |
| TLV320AIC3254EVM-K | 功能描述:音頻 IC 開發(fā)工具 TLV320AIC3254EVM-K Eval Mod 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 |
| TLV320AIC3254EVM-U | 功能描述:音頻 IC 開發(fā)工具 TLV320AIC3254 USB 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 |
| TLV320AIC3254IRHBR | 功能描述:接口—CODEC Very LW PWR Stereo Audio CODEC/miniDSP RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉(zhuǎn)換速率:48 kSPs 接口類型:I2C ADC 數(shù)量:2 DAC 數(shù)量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel |
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