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參數資料
| 型號： | TLV320AIC28IRGZR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQCC48 |
| 封裝： | 7 X 7 MM, GREEN, PLASTIC, QFN-48 |
| 文件頁數： | 10/85頁 |
| 文件大小： | 1053K |
| 代理商： | TLV320AIC28IRGZR |
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TLV320AIC28
SLAS418B FEBRUARY 2004 REVISED MAY 2005
www.ti.com
18
OVERVIEW
The AIC28 is a highly integrated stereo audio DAC and mono audio ADC for portable computing,
communication and entertainment applications. The AIC28 has a register-based architecture where all
peripheral functions are controlled through the registers and on-board state machines.
The AIC28 consists of the following blocks:
D Audio Codec
D Headset and Button Detection
D Battery Monitors
D Auxiliary Inputs
D Temperature Monitor
Communication to the AIC28 is via a standard SPI serial interface. This interface requires that the Slave Select
signal (SS) be driven low to communicate with the AIC28. Data is then shifted into or out of the AIC28 under
control of the host microprocessor, which also provides the serial data clock.
Control of the AIC28 and its functions is accomplished by writing to different registers in the AIC28. A simple
command protocol is used to address the 16-bit registers. Registers control the operation of the SAR ADC and
audio codec.
OPERATION—AUDIO CODEC
AUDIO ANALOG I/O
The AIC28 has stereo audio DAC and mono audio ADC. It has a wide range of analog interfaces to support
different headsets and analog outputs. The AIC28 has features to interface output drivers (8-
, 16-, 32-)
and Microphone PGA to Cell-phone. The AIC28 also has a virtual ground (VGND) output, which can be
optionally used to connect to the ground terminal of a speaker of headphone to eliminate the ac-coupling
capacitor needed at the speaker or headphone output. A special circuit has also been included in the AIC28
to insert a short keyclick sound into the stereo audio output, even when the audio DAC is powered down. They
keyclick sound is used to provide feedback to the used when a particular button is pressed or item is selected.
The specific sound of the keyclick can be adjusted by varying several register bits that control its frequency,
duration, and amplitude.
AUDIO DIGITAL I/O INTERFACE
Digital audio data samples can be transmitted between the AIC28 and the CPU via the serial bus (BCLK, WCLK,
SDOUT, SDIN) that can be configured to transfer digital data in four different formats: Right justified (RJF), Left
justified (LJF), I2S and DSP. The four modes are MSB first and operate with variable word length between
16/20/24/32 bits. The AIC28’s audio codec can operate in master or slave mode, depending on the setting of
D11 at the register 06h of page 2. The word-select signal (WCLK) and bit clock signal (BCLK) are configured
as inputs when the bus is in slave mode (D11 = 0). They are configured as outputs when the bus is in master
mode (D11 = 1). Under master mode, both clocks start running when the I2S bus needs to be active (one of
the analog input/output paths has been configured and powered up). The WCLK is representative of the
sampling rate of the audio ADC/DAC and is synchronized with SDOUT. Although the SDOUT signal can contain
two channels of information (a left and right channel), the AIC28 sends the same ADC data in both channels.
D ADC/DAC Sampling Rate
The audio-control-1 register (Register 00H, Page 2) determines the sampling rates of DAC and ADC. The
sampling frequency is scaled down from the reference rate (Fsref). The reference rate is usually either 44.1
kHz or 48 kHz which can be selectable using bit D13 of the register Audio Control 3 (06H/Page2). The ADC
and DAC can operate with either common WCLK (equal sampling rates) or separate GPIO1 (For ADC) and
WCLK (For DAC) for unequal sampling rates. When the audio codec is powered up, it is by default configured
as an I2S slave with both the DAC and ADC operating at Fsref.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| TLV320AIC28IRGZRG4 | 功能描述:接口—CODEC Lo-Pwr Stereo Codec RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉換速率:48 kSPs 接口類型:I2C ADC 數量:2 DAC 數量: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 |
| TLV320AIC28RGZ | 制造商:TI 制造商全稱:Texas Instruments 功能描述:STEREO AUDIO CODEC WITH INTERGRATED HEADPHONE AND SPEAKER AMPLIFIERS |
| TLV320AIC28RGZR | 制造商:TI 制造商全稱:Texas Instruments 功能描述:STEREO AUDIO CODEC WITH INTERGRATED HEADPHONE AND SPEAKER AMPLIFIERS |
| TLV320AIC29 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:STEREO AUDIO CODEC WITH INTEGRATED HEADPHONE AND SPEAKER AMPLIFIERS |
| TLV320AIC29_07 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:STWREO AUDIO CODEC WITH INTERGRATED HEADPHONE AND SPEAKER AMPLIFIERS |
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