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CX20704 데이터시트 PDF




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CX20704 데이터시트, 핀배열, 회로
Audio
Speakers-on-a-Chip
Speakers-on-a-Chip with On-chip Voice/Audio DSP, Integrated
I2S/I2C Codec, and Mono Class-D Amplifier
CX20704
Conexant’s portfolio includes a comprehensive suite of semiconductor
solutions for communications and consumer applications.
The CX20704 is one of Conexant’s Speakers-on-a-Chip (SPoC) embedded
audio solutions for convergence audio entertainment and voice communication
applications. The SPoC features a proprietary on-chip Digital Signal Processor
(DSP), Codec, Mono Class-D Amplifier, I2S and I2C interfaces, high
performance 24-bit DAC’s and ADC’s, a range of digital and analog input/
output channel selections for flexible routing and mixing, and a stereo capless
headphone driver in a cost-effective single-chip package. The solution features
a suite of turnkey audio and voice enhancement algorithms designed for
applications such as Portable Navigation Devices, Portable Media Players,
Multimedia IP phones, and Mobile Internet Devices. This product is part of the
CX2070x SPoC family, which includes CX20702, CX20703, CX20705, CX20706,
CX20707 and CX20709.
The device features multiple high performance 24-bit DACs for stereo speaker
output, multiple 24-bit high performance ADCs supporting mono microphone
and one stereo line input, capless headphone output, support for bi-directional
12S, PCM, S/PDIF-out with independent sampling rates, and a range of digital
and analog input/output channel selections for flexible routing and mixing.
Different audio sampling rates ranging from 8 kHz to 96 kHz are generated
directly from the master clock without the need for external PLL. The power-
efficient mono Class-D amplifier drives a maximum of 2.5 Watt (average) from
the integrated amplifier. The device can be controlled and configured by both
read and write capability through I2C and Serial Peripheral Interface (SPI).
The on-chip Digital Signal Processor (DSP) runs a suite of innovative Conexant
proprietary voice processing algorithms and audio post processing effects that
dramatically improves sound quality and frees-up processing power for other
applications without compromising on cost and future firmware scalability. Key
audio innovations include Subband Acoustic Echo Suppression and Cancellation,
Noise Reduction, Dynamic Loudness Adapter, Mic Auto Gain Control, Digital
Equalizer, Dynamic Range Compression, and 3D effects. The embedded SPoC
Configuration Toolbox allows for fast configuration and performance optimization.
The CX20704 turnkey solution eliminates the need for a multiple-chip reference
design, making it easy and economical for manufacturers to design products
for high quality audio and voice applications. A complete evaluation kit with
reference board and all the necessary technical documents and software is
available.
The SoC is packaged in an environmentally-friendly, RoHS/Green-compliant 76-pin
QFN (Quad Flat No leads) package.
Applications
Portable Navigation Device
Portable Media Player
Multimedia IP phone
Mobile Internet Device
Distinguishing Features
• 24-bit DAC/ADC, SNR 102 dB, THD - 92 dB at
48 kHz 3.3 V
• Programmable on-chip proprietary DSP
– Subband acoustic echo suppression and
cancellation
– Noise reduction
– Dynamic loudness adaptor
– Mic auto gain control
– Digital equalizer (10 bands/channel)
– Dynamic range compression
– 3D Expander (Phantom mode and Immersion
mode)
• 5-wire digital audio I/O (I2S/PCM/SPDIF-out),
supporting full duplex independent sampling
rates
• One 2-wire I2C or 4-wire SPI slave interface for
external MCU
• 2.5 W BTL mono Class-D speaker amplifier
• One microphone interface with on-chip bias
supply
• Flexible power management
• Audio sample rate: 8, 11.025, 12, 16, 22.05, 24, 32,
44.1, 48, 64, 88.2, 96 kHz
Part Number CX20704
Description
Speakers-on-a-Chip with On-chip
Voice/Audio DSP, Integrated I2S/ I2C
Codec, and Mono Class-D Amplifier
Free Datasheet http://www.datasheet4u.com/





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