MOSA

MS6337

16-Bit Stereo Audio DAC & Mono 1.8W Power Amplifier

Plus Stereo Headphone Function

REV 2

1/20

www.mosanalog.com

16-Bit Stereo Audio DAC & Mono 1.8W Power

Amplifier Plus Stereo Headphone Function

FEATURES

‧

Operation range: 2.7V~6.5V

‧

16-bit resolution audio DAC

‧

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

‧

Output power, THD+N=1%

Mode

5V

3.3V

2.7V

4Ω

1.8W

0.72W

450mW

BTL

8Ω

1.2W

0.52W

330mW

8Ω

0.3W

125mW

85mW

SE

32Ω 90mW

43mW

25mW

‧

Component less

‧

No zero crossing distortion

‧

Fast setting time permits 2*, 4*, and 8* oversampling

(serial input) or double speed operation at 4*

oversampling

‧

‧

The minimum HIGH voltage of digital clocks(WS,DATA

and BCK)and the control inputs can be 1.6V at Vdd = 5V.

‧

Excellent Power Supply Rejection Ratio(PSRR)

‧

Low power consumption

‧

Shutdown function

‧

Output voltages can be adjusted by the external resisters

‧

Housed in 24 pin SSOP(150mil), QFN(4x4x0.8)packages

APPLICATIONS

‧

Multimedia system, Portable Digital Audio.

DESCRIPTION

The MS6337 is a 16-bits voltage-output Digital-to-Analog Converter (DAC) integrated class AB stereo headphone

driver and mono speaker power amplifier. It can drive 1.8W of continuous average power into a mono 4Ω bridged-tied

(BTL) speaker or 2 * 90mW into stereo 32Ω single ended (SE) headphone. The 16-bit DAC supports popular formats

as I2S, Right Justified.

The MS6337 is with the excellent Power Supply Rejection Ratio(PSRR) and features extremely low power dissipation,

small package size and easy application. The accuracy of the matched coarse current sources, combined with the

unique symmetrical decoding method, preclude zero-crossing distortion and ensures high quality audio reproduction.

These unique features, combined with its exceptional performance, make the MS6337 ideally suited for use in digital

audio equipment.

BLOCK DIAGRAM

Shutdown control

SD

SD Mode

Status

Shutdown

Active

Active

Shutdown

0

0

1

1

0

1

0

1

CAP

Supply

BCK

WS

DATA

BTL+

LOUT/BTL-

-

+

A1

-

+

A2

ROUT

-

+

B1

DAC

FORMAT(I2S/RJF)

DAC

Shutdown

SD

SD_MODE

400K

400K

400K

400K

RIN

LIN

HPIN

Mono / Stereo Mode

Switching Circuitry

Power Amplifier

Supply

MS6337

Click/Pop

Reduction

Bias

390K

CAP_DC

DAC_SD

Supply

DVss

Format control

FORMAT

Status

I2S

RJF

0

1

DAC control

DACSD

Status

Shutdown

Active

0

1

CAP control

CAP_DC

Status

Discharge

Charge

0

1