Specification	LM4921ITLX/NOPB

Features	DAC, Volume Control, I2S, Shutdown, SPI, Mute, Thermal Protection, Standby
Max Output Power x Channels @ Load	50 mW, 2
Mounting Type	Surface Mount
Operating Temperature [Max]	85 °C
Operating Temperature [Min]	-40 °C
Output Type	Headphones, 2-Channel (Stereo)
Package / Case	DSBGA, 20-WFBGA
Supplier Device Package	20-DSBGA
Type	Class AB
Voltage - Supply [Max]	5.5 V
Voltage - Supply [Min]	2.6 V

LM4921 Series

16-bit stereo DAC with 50-mW stereo headphone amp & volume control

Part	Voltage - Supply [Max]	Voltage - Supply [Min]	Output Type	Supplier Device Package	Package / Case	Type	Max Output Power x Channels @ Load	Operating Temperature [Max]	Operating Temperature [Min]	Features	Mounting Type	Supplied Contents	Utilized IC / Part	Amplifier Type	Board Type
Texas Instruments LM4921ITL/NOPB	5.5 V	2.6 V	Headphones 2-Channel (Stereo)	20-DSBGA	20-WFBGA DSBGA	Class AB	2 50 mW	85 °C	-40 °C	DAC I2S Mute Shutdown SPI Standby Thermal Protection Volume Control	Surface Mount
Texas Instruments LM4921ITLX/NOPB	5.5 V	2.6 V	Headphones 2-Channel (Stereo)	20-DSBGA	20-WFBGA DSBGA	Class AB	2 50 mW	85 °C	-40 °C	DAC I2S Mute Shutdown SPI Standby Thermal Protection Volume Control	Surface Mount
Texas Instruments LM4921ITLEVAL	5.5 V	2.6 V	Headphones 2-Channel (Stereo)				2 50 mW					Board(s)	LM4921	Class AB	Fully Populated

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Tape & Reel (TR)	3000	$ 1.34
		6000	$ 1.29
Texas Instruments	LARGE T&R	1	$ 2.28
		100	$ 2.00
		250	$ 1.40
		1000	$ 1.13

Description

General part information

LM4921 Series

The LM4921 combines a 16-bit resolution stereo I2S input digital-to-analog converter (DAC) with a stereo headphone audio power amplifier. It is primarily designed for demanding applications in mobile phones and other portable communication device applications. The LM4921 features an I2S serial interface for the digital audio information and a 16-bit SPI serial interface for internal register control and communication. With AVDDand DVDD= 3.0VDCand driving a 32Ω single-ended load to a 26mWRMSoutput level the distortion (THD+N) of the LM4921 will be less than 0.5%. The LM4921 also features a programmable 32-step digital volume control accessed through an SPI interface.

Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. It is, therefore, ideally suited for mobile phone and other low voltage applications where minimal power consumption is a primary requirement.

The LM4921 features a low-power consumption shutdown mode, and also has an internal thermal shutdown protection mechanism.

Documents

Technical documentation and resources

Low Voltage I 2 S 16-Bit Stereo DAC w/Stereo HP Pwr Amp & Vol Cntrl datasheet (Rev. E)

Data sheet