The LM4540 is an audio codec for PC systems which performs the analog-intensive function of the Analog Codec ’97 Rev 1.03 architecture. Using 18-Bit Σ∆ A/D and D/A converters, the LM4540 provides 90dB of dynamic range. The LM4540 was designed specifically to provide a high quality audio path and provide all analog functionality in a PC audio system. It featu.
full duplex stereo A/D’s and D/A’s and an analog mixer with 2 stereo and 3 mono inputs, each of which has separate gain, attenuation and mute control. In addition, the LM4540 provides National’s 3D Sound stereo enhancement technology. The LM4540 features AC-Link, a synchronous, fixed rate serial bus for connection to the digital AC ’97 Controller. The separation of the analog and digital functions of the AC ’97 architecture allows for system design flexibility and increased overall performance. Key Specifications n Analog Mixer Dynamic Range n D/A Dynamic Range n A/D Dynamic Range 95dB (typ) .
No. | Partie # | Fabricant | Description | Fiche Technique |
---|---|---|---|---|
1 | LM4543 |
National Semiconductor |
AC97 Codec | |
2 | LM4545 |
National Semiconductor |
AC97 Codec | |
3 | LM4546 |
National Semiconductor |
AC97 Codec | |
4 | LM4546 |
Texas Instruments |
AC97 Rev2 Codec | |
5 | LM4546A |
Texas Instruments |
AC97 Rev2 Multi-Channel Audio Codec | |
6 | LM4546A |
National Semiconductor |
2 Multi-Channel Audio Codec | |
7 | LM4546B |
Texas Instruments |
Multi-Channel Audio Codec | |
8 | LM4546B |
National Semiconductor |
AC 97 Rev 2 Multi-Channel Audio Codec | |
9 | LM4548 |
National Semiconductor |
AC97 Codec | |
10 | LM4548 |
Texas Instruments |
AC97 Rev2 Codec | |
11 | LM4548A |
Texas Instruments |
AC97 Rev2 Multi-Channel Codec | |
12 | LM4548A |
National Semiconductor |
2 Multi-Channel Audio Codec |