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LM4546  Product Folder

AC '97 Rev 2 Codec with Sample Rate Conversion and National 3D Sound [Life-time buy]
  

See Also:		   
LM4546A - CHANGED FAB LOCATION AND IMPROVED FUNCTIONALITY
Generic P/N 4546
General
Description		 Features Datasheet Package
& Models		 Samples
& Pricing

Datasheet

TitleSize in KbytesDate
View Online
Download
Receive via Email
LM4546 AC '97 Rev 2 Codec with Sample Rate Conversion and National 3D Sound 314 Kbytes 29-Sep-00 View Online Download Receive via Email

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Package Availability, Models, Samples & Pricing

Part NumberPackageStatusModelsSamples &
Electronic
Orders		Budgetary PricingStd
Pack
Size		Package
Marking
TypePinsMSL/Lead-Free AvailabilityLead
Time		QtySPICEIBISQty$US each
LM4546VHLQFP48StatusLifetime buyN/AN/A 
Buy Now 		1K+$2.84tray
of
250		NS2ZXYTT
LM4546VH
3-8 weeks5000
LM4546VHXLQFP48StatusLifetime buyN/AN/A 1K+$2.84reel
of
1000		NS2ZXYTT
LM4546VH
3-8 weeks30000
LM4546 MDCUnpackaged DieLifetime buyN/AN/A   tray
of
N/A		-
N/A0
LM4546 MWCWaferLifetime buyN/AN/A   wafer jar
of
N/A		-
N/A0

Obsolete Parts

Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
LM4546VH
LM4546AVH
NATIONAL SEMICONDUCTOR
05/28/2004
LM4546VH
NATIONAL SEMICONDUCTOR
LM4546VH
05/28/2004
LM4546VH
National Semiconductor
LM4546VH
12/01/2004
LM4546VHX
LM4546AVHX
NATIONAL SEMICONDUCTOR
05/28/2004
LM4546VHX
NATIONAL SEMICONDUCTOR
LM4546VHX
05/28/2004
LM4546VHX
National Semiconductor
LM4546VHX
12/01/2004

General Description

The LM4546 is an audio codec for PC systems which is fully PC98 compliant and performs the analog intensive functions of the AC97 Rev 2 architecture. Using 18-bit Sigma-Delta A/D's and D/A's, the LM4546 provides 90dB of Dynamic Range.

The LM4546 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 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. The LM4546 also provides National's 3D Sound stereo enhancement.

The LM4546 supports variable sample rate conversion as defined in the AC97 Rev2 specification. The sample rate for the A/D and D/A can be programmed separately to convert any rate between 4kHz - 48kHz with a resolution of 1Hz. The AC97 architecture separates the analog and digital functions of the PC audio system allowing both for system design flexibility and increased performance.

Features

  • AC'97 Rev 2 compliant
  • National's 3D Sound circuitry
  • High quality Sample Rate Conversion (SRC) from 4kHz to 48kHz in 1Hz increments
  • Multiple Codec support
  • Advanced power management support
  • Digital 3V and 5V compliant

Key Specification

• Analog Mixer Dynamic Range97dB (typ)
• D/A Dynamic Range89dB (typ)
• A/D Dynamic Range90dB (typ)

Applications

  • Desktop PC Audio Systems
  • Portable PC Systems
  • Mobile PC Systems
[Information as of 15-Jan-2004]

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