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LM4550B Datasheet PDF - Texas Instruments

Número de piezacomponentes DescripciónFabricante
LM4550B AC '97 Rev 2.1 Multi-Channel Audio Codec With Stereo Headphone Amplifier, Sample Rate Conversion and TI 3D Sound Texas-Instruments
Texas Instruments Texas-Instruments
Other PDF  no available.
LM4550B Datasheet PDF : LM4550B pdf   
LM4550B image

Description
The LM4550B device is an audio codec for PC systems which is fully PC99 compliant and performs the analog intensive functions of the AC 97 Rev 2.1 architecture. Using 18-bit Sigma-Delta ADCs and DACs, the LM4550B provides 90 dB of Dynamic Range.
The LM4550B was designed specifically to provide a high quality audio path and provide all analog functionality in a PC audio system. It features full duplex stereo ADCs and DACs and analog mixers with access to 4 stereo and 4 mono inputs.

Features
• AC 97 Rev 2.1 Compliant
• High Quality Sample Rate Conversion From 4 kHz
   to 48 kHz in 1 Hz Increments
• Supports up to 6 DAC Channel Systems With
   Multiple LM4550Bs or With Other TI LM45xx
   Codecs
• Unique TI Chaining Function Shares a Single
   Controller SDATA_IN Pin Among Multiple Codecs
• Stereo Headphone Amp With Separate Gain
   Control
• TIs 3D Sound Stereo Enhancement Circuitry
• Advanced Power Management Support
• External Amplifier Power-Down (EAPD) Control
• PC Beep Passthrough to Line Out During
   Initialization or Cold Reset
• Digital 3.3-V and 5-V Supply Options
• Extended Temperature: −40°C ≤ TA ≤ 85°C
• Key specifications
   – Analog Mixer Dynamic Range, 97 dB (Typical)
   – DAC Dynamic Range, 89 dB (Typical)
   – ADC Dynamic Range, 90 dB (Typical)
   – Headphone Amp THD+N at 50 mW, 0.02%
      (Typical) into 32Ω

Applications
• Desktop PC Audio Systems on PCI Cards, AMR
   Cards, or With Motherboard Chips Sets Featuring
   AC Link
• Portable PC Systems as on MDC Cards, or with a
   Chipset or Accelerator Featuring AC Link
• General Audio Frequency Systems Requiring 2, 4
   or 6 DAC Channels and/or up to 8 ADC Channels
• Automotive Telematics

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