MOSA

MS6821

4 Stereo inputs / 2W PA output integrated Audio DAC and Volume Control

REV 1.0

1

www.mosanalog.com

4 Stereo Inputs, 2W BTL Stereo Output

16-bit Stereo DAC and Volume Control

FEATURES

•Operation range: 2.4V~5.5V

•Volume control range

Gain: 0 to 21dB, 3dB/step

Attenuation: 0 to –77.5dB, 1.25dB/step

•4 stereo inputs (mixed with an audio DAC)

•Output mode : Speaker( BTL)/Headphone(SE)

•BTL Output power, THD+N=1%, Stereo Input

•BTL Output power, DAC Input

•Built-in 16-bit Audio DAC

•Audio format : I

•Control interface : I

•Excellent Power Supply Rejection Ratio(PSRR)

•Flexibility power management

•Component less

•Reduce pop noise circuit

•Housed in TSSOP28 package, enhanced thermal

PAD

APPLICATIONS

Multimedia system, Portable Digital Audio.

DESCRIPTION

The MS6821 is a 16-bits voltage-output Digital-to-Analog Converter (DAC) integrated class AB stereo headphone

driver and stereo speaker power amplifier. It can drive 2W of continuous average power into a dual 4

bridged-tied

(BTL) speaker or 2 * 90mW into stereo 32

single ended (SE) headphone. The 16-bit DAC supports general and

popular formats as I2S, Right justified. The volume control offers wide range of gain and attenuation for 4-set stereo

input. All of the functions are set by I2C interface.

The MS6821 has good feature for portable equipment, including wide voltage operation 2.4V~5.5V, low power

consumption, flexible power management, component less and small package TSSOP28, make the MS6821 ideally

suitable for use in the portable digital audio equipments.

BLOCK DIAGRAM

RIN2

RIN1

Attenuation

&

Mute

LIN1

LIN2

LIN3

RIN3

L-ch selector

& Gain

LIN4

RIN4

BCK

WS

DATA

OUTR+

OUTR-

OUTL+

OUTL-

16-bit DAC

Mixer

Attenuation

&

Mute

Mixer

-1

-1

-1

-1

CAP

VDD

Vss

SCL

SDA

Interface

DACL /

LINE_INL

DACR /

LINE_INR

Supply

Power Amplifier

Supply

PV

PV

DDL

PV

SSL

R-ch selector

& Gain