Features 18-bit stereo DAC Multiple distinct output modes Stereo speaker amplifier Stereo headphone amplifier Mono earpiece amplifier Mono Line Output for external handsfree carkit Independent Left, Right, headphone and Mono speaker volume controls National 3D enhancement with programmable effect level I2C/SPI (selectable) compatible interface Ultra low shutdown current Click and Pop Suppression circuit Description The LM4934 is an integrated audio sub-system designed for stereo cell phone applications. Operating on a 3.3V supply, it combines a stereo speaker amplifier delivering 520mW per channel into an 8 load, a stereo headphone amplifier delivering 36mW per channel into a 32 load, a mono earpiece amplifier delivering 55mW into a 32 load, and a line output for an external powered handsfree speaker. It integrates the audio amplifiers, volume control, mixer, power management control, and National 3D enhancement all into a single package. In addition, the LM4934 routes and mixes the stereo and mono inputs into multiple distinct output modes. The LM4934 features an I2S serial interface for full range audio and an I2C/SPI compatible interface for control. Boomer audio power amplifiers are designed specifically to provide high quality output power with a minimal amount of external components. Key Specification POUT, Stereo BTL, 8, 3.3V, 1% THD+N 520mW (typ) POUT HP, 32, 3.3V, 1% THD+N 36mW (typ) POUT Mono Earpiece, 32, 3.3V, 1% THD+N 55mW (typ) Shutdown current 0.6µA (typ) DAC SNR 95dB (typ) Applications Cell Phones PDAs

	Block Diagram click for larger image
Typical Performance click for larger image

Datasheets

Title		Size	Date	Other Language
	LM4934 3D Audio Sub-System with Stereo Speaker, OCL/SE Stereo Headphone, Earpiece and Mono Line Level Outputs	1287 Kbytes	13-Feb-06

Application Notes

Title		Size	Date	Other Language
	AN-1492: Application Note 1492 LM4934 I2C/SPI Interface Software Manual V1.0	1527 Kbytes	25-May-06	中文

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LM4934RL/NOPB RoHS Status	MICRO SMDXT	Full production Lead Time: 6 weeks	Distributor Region Qty DIGI-KEY Worldwide 0	$3.50 each at 1K+ pcs	reel of 250
LM4934RLX/NOPB RoHS Status	MICRO SMDXT	Full production Lead Time: 6 weeks	Distributor Region Qty DIGI-KEY Worldwide 0	$3.50 each at 1K+ pcs	reel of 1000

Obsolete Versions

Obsolete Part	Alternate Part or Supplier	Source	Last Time Buy Date
LM4934WL	LM4934RL	NATIONAL SEMICONDUCTOR	06 Mar 2007
LM4934WLX	LM4934RLX	NATIONAL SEMICONDUCTOR	06 Mar 2007

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LM4934.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LM4934 is located at RoHS Status.

Part Number(s) (NSID)	Weight (milligrams)	Type	Pins	MSL Rating	Peak Reflow	RoHS Status	CAD Symbols	Models	Package Marking Format
LM4934RL/NOPB	14.012	MICRO SMDXT	42	1	260	Detail	Download	N/A	XYTT I GG9
LM4934RLX/NOPB	14.012	MICRO SMDXT	42	1	260	Detail	Download	N/A	XYTT I GG9

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LM4934.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LM4934 is located at RoHS Status.

Design Tools

Title	Size	Date
Audio Amplifier Digital Control Interface Evaluation Board Software

CAD Symbols and Models Download LM4934 CAD Symbols

Models N/A

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM4934RL	CMOS7	0	21301	0	0	1584000	3	449464325
LM4934RLX	CMOS7	0	21301	0	0	1584000	3	449464325

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

For more information on Reliability Metrics, please click here.

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LM4934.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LM4934 is located at RoHS Status.

Obsolete Versions

Obsolete Part	Alternate Part or Supplier	Source	Last Time Buy Date
LM4934WL	LM4934RL	NATIONAL SEMICONDUCTOR	06 Mar 2007
LM4934WLX	LM4934RLX	NATIONAL SEMICONDUCTOR	06 Mar 2007