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PDF CX20671 Data sheet ( Hoja de datos )
| Número de pieza | CX20671 | |
| Descripción | Low-Power Codec SoC | |
| Fabricantes | CONEXANT | |
| Logotipo |  |
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 1. Low-Power Codec SoC - Conexant  Hay una vista previa y un enlace de descarga de CX20671 (archivo pdf) en la parte inferior de esta página. Total 67 Páginas | ||
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Vendor P/N is CX20671-21Z , Page. 10
Pin Define : Page. 18
Dimension : Page. 42
CX20671
Low-Power Codec SoC with
Integrated Class-D Stereo
Amplifier for High Definition
Audio
Data Sheet
DSH-202291p1
July 2010
Free Datasheet http://www.datasheet4u.com/
1 page  
Figures
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CX20671 Devices and Major Signal Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
CX20671 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
CX20671 40-QFN Hardware Interface Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
CX20671 40-QFN Pad Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Output Butter for 3.3 V Signaling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
CX20671 Output Buffer for 1.5 V Signaling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Class-D Speaker Amplifier Magnitude Frequency Response (16 bit, 48 kHz) . . . . . . . . 29
CX20671 THD+N versus Frequency, for Class-D Amplifier Output . . . . . . . . . . . . . . . . 30
CX20671 Power Supply Rejection, for Class-D Amplifier Output . . . . . . . . . . . . . . . . . . 30
CX20671 Power Supply Rejection, for Headphone Amplifier Output . . . . . . . . . . . . . . . 31
CX20671 Class-D Output Power vs. Load (1% THD) . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
High-Pass Filter Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Digital Mic Clock Timing Waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
BIT_CLK and SYNC Timing Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Data Output and Input Timing Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
CX20671 40-QFN Package Drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
DSH-202291p1
7/22/10
Conexant
Conexant Proprietary and Confidential
5
Free Datasheet http://www.datasheet4u.com/
5 Page 
CX20671 Data Sheet
Introduction
1.2
CX20671 Audio Codec Features
24-bit, two pairs of independent DACs and three pairs of independent ADCs
ProCoustic headphone driver, which delivers 50 mW into 32 Ω load with no pop,
eliminating the need for an external amplifier and DC-blocking capacitors
Integrated 5 V to 3.3 V low-dropout voltage regulator for improved audio
performance, eliminating need for external regulator or power transistor
Integrated 3.3 V to 1.8 V low-dropout voltage regulator, used to power digital
blocks
Integrated 2 WRMS (per channel) class-D stereo speaker amplifier with Spread
Spectrum and 10-kV ESD withstand capability
Digital Microphone interface with internal MIC boost supporting 2 digital
microphone elements
Independent Sony Philips Digital Interface (SPDIF) Output supporting sample rates
44.1 kHz, 48 kHz, and 96 kHz, 16, 20, and 24-bit resolution
Internal microphone boost
– Digital: 0, 12, 24, 36, 48 dB
– Analog: 0, 10, 20, 30, 40 dB
Microphone Security Control (Contact Conexant Sales/FAE for additional
information).
Exceeds Vista/Windows 7 Desktop and Notebook Premium Logo Requirements,
WLP4.0
D-Flex power management exceeds Intel ECR 15B requirements, and features
Wake-On-PCBeep functionality
Hardware Headphone limiter bit (supports GS Mark EN50332-2)
Compliant with Intel High Definition Audio Specification Rev. 1.0
Supports both 1.5 V and 3.3 V signaling with the core logic chipset
Retaskable ports
– Configure between Headphone and Line-out or between Mic and Line-in
Independent sampling rate for DAC and ADC; supports audio formats ranging from
16-bit, 44.1 kHz to 24-bit, 192 kHz
Pop Shield: pops and clicks reduction circuitry, including class-D speaker outputs
Jack sense detects up to four jacks using only one sense pin
Digital Mixer
+3.3 V analog and I/O operation; uses Vaux for power management modes
Audio Director for Headphone and Internal Speakers Redirection (optional).
– Supporting Classic Mode
– Vista/Windows 7 Multi-Stream
– Custom Multi-Stream Mode
Voice Processing Algorithms (optional)
DSH-202291p1
7/22/10
Conexant
Conexant Proprietary and Confidential
11
Free Datasheet http://www.datasheet4u.com/
11 Page | ||
| Páginas | Total 67 Páginas | |
| PDF Descargar | [ Datasheet CX20671.PDF ] | |
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