LM4546B
- AC '97 Rev 2.1 Compliant
- High Quality Sample Rate Conversion from 4 kHz to 48 kHz in 1 Hz Increments
- Multiple Codec Support
- Texas Instruments' 3D Sound Stereo Enhancement Circuitry
- Advanced Power Management Support
- Digital 3.3V and 5V Supply Options
- Extended Temperature: −40°C ≤ TA ≤ 85°C
Key Specifications
- Analog Mixer Dynamic Range 97 dB (typ)
- DAC Dynamic Range 89 dB (typ)
- ADC Dynamic Range 90 dB (typ)
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The LM4546B 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 LM4546B provides 90 dB of Dynamic Range.
The LM4546B 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 2 stereo and 2 mono inputs. Each mixer input has separate gain, attenuation and mute control and the mixers drive 1 mono and 1 stereo output, each with attenuation and mute control. The LM4546B supports Texas Instruments' 3D Sound stereo enhancement and a comprehensive sample rate conversion capability. The sample rate for the ADCs and DACs can be programmed separately with a resolution of 1 Hz to convert any rate in the range 4 kHz – 48 kHz. Sample timing from the ADCs and sample request timing for the DACs are completely deterministic to ease task scheduling and application software development. These features together with an extended temperature range also make the LM4546B suitable for non-PC codec applications.
The LM4546B features the ability to connect several codecs together using the Extended AC Link configuration of one dedicated serial data signal to the Controller per codec. LM4546B systems support up to 8 simultaneous channels of streaming data on Input Frames (Codec to Controller) while Output Frames (Controller to Codec) carry 2 streams to multiple codecs. The LM4546B may also be used in systems with the Texas Instruments LM4550 to support up to 6 simultaneous channels of streaming data on Output Frames.
The AC '97 architecture separates the analog and digital functions of the PC audio system allowing both for system design flexibility and increased performance.
技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | LM4546B AC '97 Rev 2 Multi-Chan Audio Codec w/Sam Rate Conv & Nat 3D Sound datasheet (Rev. F) | 2013/5/2 | |||
| 應用說明 | Out-of-Band Noise Measurement Issues for Audio Devices (Rev. A) | 2019/12/31 | ||||
| 應用說明 | Audio Serial Interface Configurations for Audio Codecs (Rev. A) | 2019/6/27 | ||||
| 應用說明 | Using the MSP430 Launchpad as a Standalone I2C Host for Audio Products (Rev. A) | 2013/10/28 | ||||
| 應用說明 | Solving Enumeration Errors in USB Audio DAC and CODEC Designs | 2009/10/30 | ||||
| 應用說明 | Configuring I2S to Generate BCLK from Codec Devices & WCLK from McBSP Port | 2009/7/8 |
設計與開發
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| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| LQFP (PT) | 48 | Ultra Librarian |