LM4550B是TI公司的一款音频编解码器产品，LM4550B是AC '97 Rev 2.1 Codec with Sample Rate Conversion and National 3D Sound，本页介绍了LM4550B的产品说明、应用、特性等，并给出了与LM4550B相关的TI元器件型号供参考。
LM4550B - AC '97 Rev 2.1 Codec with Sample Rate Conversion and National 3D Sound - 音频编解码器 - 音频转换器 - TI公司（Texas Instruments，德州仪器）
- 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
- TI's 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
- 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
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.
| PART NUMBER | PACKAGE | BODY SIZE (NOM) |
|---|---|---|
| LM4550B | LQFP (48) | 7.00 mm × 7.00 mm |
