參數(shù)資料
型號(hào)： PCM3794RHBRG4
元件分類： Codec
英文描述： 16-Bit, Low-Power Stereo Audio CODEC With Microphone Bias, Headphone, and Digital Speaker Amplifier
中文描述： 16位，低功耗立體聲音頻編解碼器麥克風(fēng)偏置，耳機(jī)，揚(yáng)聲器放大器和數(shù)字
文件頁(yè)數(shù)： 17/63頁(yè)
文件大?。?/td> 915K
代理商： PCM3794RHBRG4
www.ti.com
Speaker Output (Class-D, PCM3793)
Analog Mixing and Bypass
Microphone Bias
Automatic Level Control (ALC) for Recording
3-D Sound
Three-Band Tone Control
High-Pass Filter and Notch Filter
Digital Monaural Mixing
Zero-Cross Detection
PCM3793
PCM3794
SLES193A–AUGUST 2006–REVISED SEPTEMBER 2006
The SPOLP, SPOLN and SPORP, SPORN pins are stereo or mono speaker differential outputs (BTL) with a
maximum of 700 mWrms (V
PA
= 3.6 V, volume = 6 dB) into an 8-
load. The digital speaker amplifier offers
maximum battery life and minimum heat, eliminates the LC low-pass filter, and includes analog volume
amplification for each output from 6 dB to –70 dB with 0.5-, 1-, 2- or 4-dB steps, which can be set by register 66,
67 (SLV[5:0], SLR[5:0]). Spectrum spreading technology and selectable switching frequency to reduce EMI
noise is controlled by register 71 (DFQ[2:0], SPS[1:0] and SPSE). The speaker amplifiers have a thermal
shutdown circuit which detects when the device temperature reaches approximately 150
°
C; then the speaker
amplifier is powered down.
Mixing amplifiers (MXL, MXR) mix gain-controlled analog inputs from the AIN pins which have bypassed ADC
and DAC and direct the mixed signal to the headphone or speaker outputs. Analog mixing is controlled by
register 87 (AD2S, AIR[1:0], AIL[1:0]), register 88 (MXR[2:0], MXL[2:0]), and register 89 (GMR[2:0], GML[2:0]).
The analog mixing functions are suitable for FM radio, headset, and another analog sources without an ADC.
The MICB pin is the microphone bias source for an external microphone and can provide 2 mA (typical) bias
current.
The sound for microphone recording should be expanded to a suitable level without saturation. The digitally
controlled automatic level control (ALC) provides automatic expansion for small input signals and compression
for large input signals while recording. The expansion level, compression level, attack time, and recovery time
can be selected by register 83. The register 83 description explains the details of these settings.
A 3-D sound effect is provided by mixing L-channel and R-channel data with band pass filter that can be
controlled two parameters, mixing ratio and band pass filter characteristic by register 95 (3DP[3:0], 3FLO). The
3-D sound effect can be applied to the DAC digital input or ADC digital output, as selected by register 95
(SDAS).
Tone control has bass, midrange, and treble controls that can be adjusted from 12 dB to –12 dB in 1-dB steps
by registers 92 to 94 (LGA[4:0], MGA[4:0] and HGA[4:0]). Register 92 (LPAE) attenuates the digital input signal
automatically to prevent clipping of the output signal at settings above 0 dB for bass control. LPAE has no effect
on midrange and treble controls.
The high-pass filter eliminates the dc offset of the ADC analog signal and can be set for a cutoff frequency of 4
Hz or 240 Hz at of 48-kHz sampling frequency by register 81 (HPF[1:0]). A register 95 (SDAS) selection applies
the filter to either the DAC digital input or the ADC digital output.
Notch filters are provided to remove noise of a particular frequency, such as CCD noise, motor noise, or other
mechanical noise in a particualr application. The PCM3793/94 has two notch filters for which the center
frequency and frequency bandwidth can be programmed by registers 96 to 104. A register 95 (SDAS) selection
applies the filter to either the DAC digital input or the ADC digital output.
Register 96 (MXEN) enables or disables the internal mixing of stereo digital data to monaural digital data.
Zero-cross detection minimizes audible zipper noise while changing analog volume and digital attenuation. This
function can be applied to digital input or digital output by register 86 (ZCRS).
17
Submit Documentation Feedback
相關(guān)PDF資料
PDF描述
PCM3794RHBT 16-Bit, Low-Power Stereo Audio CODEC With Microphone Bias, Headphone, and Digital Speaker Amplifier
PCM3793 16-Bit, Low-Power Stereo Audio CODEC With Microphone Bias, Headphone, and Digital Speaker Amplifier
PCM3793RHB 16-Bit, Low-Power Stereo Audio CODEC With Microphone Bias, Headphone, and Digital Speaker Amplifier
PCM3793RHBR 16-Bit, Low-Power Stereo Audio CODEC With Microphone Bias, Headphone, and Digital Speaker Amplifier
PCM3793RHBRG4 16-Bit, Low-Power Stereo Audio CODEC With Microphone Bias, Headphone, and Digital Speaker Amplifier
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PCM3794RHBT 功能描述:接口—CODEC Very Low-Pwr Stereo CODEC 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(fēng)格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel
PCM3794RHBTG4 功能描述:接口—CODEC Very Low-Pwr Stereo CODEC 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(fēng)格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel
PCM-38 功能描述:電線鑒定 Pre-Printed WM Card, Vinyl Cloth, .22" W RoHS:否 制造商:TE Connectivity / Q-Cees 產(chǎn)品:Labels and Signs 類型: 材料:Vinyl 顏色:Blue 寬度:0.625 in 長(zhǎng)度:1 in
PCM-380 制造商:Panduit Corp 功能描述:
PCM-3810I-AE 制造商:Advantech Co Ltd 功能描述:250 KS/S, 12-BIT, MULTIFUNCTION PCI-10 - Bulk 制造商:Advantech Co Ltd 功能描述:250 kS/s, 12-bit, Multifunction PCI-104 module
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*