General Description

The MAX5556–MAX5559 stereo audio sigma-delta

digital-to-analog converters (DACs) offer a simple and

complete stereo digital-to-analog solution for media

servers, set-top boxes, video-game hardware, automo-

tive rear-seat entertainment and other general consumer

audio applications. These DACs feature built-in digital

interpolation/filtering, sigma-delta digital-to-analog con-

version and analog output filtering. Control logic and

mute circuitry minimize audible pops and clicks during

power-up, power-down, clock changes, or when invalid

clock conditions occur.

The MAX5556–MAX5559 receive input data over a flexi-

tified, right-justified 16-bit, and right-justified 18-bit

audio data. Data can be clocked by either an external

or internal serial clock. The internal serial clock frequen-

cy is programmable by selection of a master clock

(MCLK) and sample clock (LRCLK) ratio. Sampling

rates from 2kHz to 50kHz are supported.

The MAX5556–MAX5559 operate from a single +4.75V

to +5.5V analog supply with total harmonic distortion

plus noise below -87dB. These devices are available in

8-pin SO packages and are specified over the -40°C to

+85°C industrial temperature range.

Applications

Digital Video Recorders and Media Servers

Set-Top Boxes

Video-Game Hardware

Automotive Rear-Seat Entertainment

Features

♦ Simple and Complete Stereo Audio DAC

Solutions, No Controls to Set

♦ Sigma-Delta Stereo DACs with Built-In

Interpolation and Analog Output Filters

♦ Clickless/Popless Operation

♦ -87dB THD+N

♦ +87dB Dynamic Range

♦ Master Clock (MCLK) up to 25MHz

♦ Automatic Detection of Clock Ratio (MCLK/

LRCLK)

Ordering Information

Typical Operating Circuit

19-0550; Rev 0; 5/06

Low-Cost Stereo Audio DACs

________________________________________________________________

Maxim Integrated Products

1

For pricing delivery, and ordering information please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

Note:

All devices are specified over the -40°C to +85°C oper-

ating temperature range. Contact factory for +105°C operation.

*

Future product—contact factory for availability.

SERIAL

INTERFACE

MCLK

LRCLK

SCLK

SDATA

GND

OUTR

OUTL

CLOCK

DAC

DAC

+5V

LEFT

OUTPUT

RIGHT

OUTPUT

LINE-LEVEL

BUFFER

LINE-LEVEL

BUFFER

AUDIO

DECOMPRESSION

MAX5556–MAX5559

Pin Configuration

GND

OUTR

MCLK

1

2

8

7

OUTL

SCLK

LRCLK

SDATA

SO

TOP VIEW

3

4

6

5

MAX5556–

MAX5559

PART

PIN-

PACKAGE

PKG

CODE

DATA FORMAT

MAX5556ESA

8 SO

S8-5

MAX5557ESA* 8 SO

S8-5

Left-justified data

MAX5558ESA* 8 SO

S8-5

Right-justified 16-Bit data

MAX5559ESA* 8 SO

S8-5

Right-justified 18-Bit data