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PCM3794ARHBT PDF预览

PCM3794ARHBT

更新时间： 2024-09-21 04:10:59
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BB 解码器编解码器放大器
页数 文件大小 规格书
68页 1196K
描述
16-Bit, Low-Power Stereo Audio CODEC With Microphone Bias, Headphone, and Digital Speaker Amplifier

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PCM3794ARHBT 数据手册

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PCM3793A  
PCM3794A  
SLAS529A–JANUARY 2007–REVISED FEBRUARY 2007  
16-Bit, Low-Power Stereo Audio CODEC With Microphone Bias, Headphone, and Digital  
Speaker Amplifier  
FEATURES  
•
•
2 (I2C) or 3 (SPI) Wire Serial Control  
•
Analog Front End:  
Programmable Function by Register Control:  
–
–
–
–
Stereo Single-Ended Input With Multiplexer  
Mono Differential Input  
–
–
–
–
–
–
–
–
–
–
–
–
Digital Attenuation of DAC: 0 dB to –62 dB  
Digital Gain of DAC: 0, 6, 12, 18 dB  
Power Up/Down Control for Each Module  
6-dB to –70-dB Gain for Analog Outputs  
30-dB to –12-dB Gain for Analog Inputs  
0/20 dB Selectable for Microphone Input  
0-dB to –21-dB Gain for Analog Mixing  
Parameter Settings for ALC  
Stereo Programmable Gain Amplifier  
Microphone Amplifier (20 dB) and Bias  
•
Analog Back End:  
–
–
Stereo/Mono Line Output With Volume  
Stereo/Mono Headphone Amplifier With  
Volume and Capless Mode  
–
Stereo/Mono Digital Speaker Amplifier  
(BTL) With Volume  
Three-Band Tone Control and 3D Sound  
High-Pass Filter: 4-, 120-, 240-Hz  
•
Analog Performance:  
Two-Stage Programmable Notch Filter  
Analog Mixing Control  
–
–
–
Dynamic Range: 93 dB (DAC)  
Dynamic Range: 90 dB (ADC)  
•
•
•
•
Pop-Noise Reduction Circuit  
40-mW + 40-mW Headphone Output at  
RL = 16 Ω  
Short and Thermal Protection Circuit  
Package: 5-mm × 5-mm QFN Pacakge  
Operation Temperature Range: –40°C to 85°C  
–
700-mW + 700-mW Speaker Output at  
RL = 8 Ω  
•
•
Power Supply Voltage  
APPLICATIONS  
–
–
–
–
1.71 V to 3.6 V for Digital I/O Section  
1.71 V to 3.6 V for Digital Core Section  
2.4 V to 3.6 V for Analog Section  
•
•
•
Portable Audio Player, Cellular Phone  
Video Camcorder, Digital Movie/Still Camera  
PMP/DMB  
2.4 V to 3.6 V for Power Amplifier Section  
DESCRIPTION  
Low Power Dissipation:  
The PCM3793A/94A is a low-power stereo CODEC  
designed for portable digital audio applications. The  
device integrates stereo digital speaker amplifier,  
headphone amplifier, line amplifier, line input, boost  
amplifier, microphone bias, programmable gain  
control, analog mixing, sound effects, and automatic  
level control (ALC). It is available in a small-footprint,  
5-mm × 5-mm QFN package. The PCM3793A/94A  
supports right-justified, left-justified, I2S, and DSP  
formats, providing easy interfacing to audio DSP and  
decoder/encoder chips. Sampling rates up to 50 kHz  
are supported. The user-programmable functions are  
accessible through a two- or three-wire serial control  
port.  
–
–
–
7 mW in Playback, 1.8 V/2.4 V, 48 kHz  
13 mW in Record, 1.8 V/2.4 V, 48 kHz  
3.3 µW in Power Down  
•
•
•
Sampling Frequency: 5 kHz to 50 kHz  
Automatic Level Control for Recording  
Operation From a Single Clock Input Without  
PLL  
•
•
System Clock:  
–
Common-Audio Clock (256 fS/384 fS), 12/24,  
13/26, 13.5/27, 19.2/38.4, 19.68/39.36 MHz  
Headphone Plug Insert Detection  
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas  
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2007, Texas Instruments Incorporated  
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