MAXIM MAX5556 Technical data

________________________________________________________________

Maxim Integrated Products

1

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.

Low-Cost Stereo Audio DAC

MAX5556

General Description

The MAX5556 stereo audio sigma-delta digital-to-analog
converter (DAC) offers a simple and complete stereo
digital-to-analog solution for media servers, set-top
boxes, video-game hardware, automotive rear-seat
entertainment, and other general consumer audio appli­cations. This DAC features built-in digital interpolation/fil­tering, sigma-delta digital-to-analog conversion, 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 receives input data over a 3-wire
I2S-compatible interface with left-justified audio data.
Data can be clocked by either an external or internal
serial clock. The internal serial clock frequency is pro­grammable by selection of a master clock (MCLK) and
sample clock (LRCLK) ratio. Sampling rates from 2kHz
to 50kHz are supported.

The MAX5556 operates from a single +4.75V to +5.5V
analog supply with total harmonic distortion plus noise
below -87dB. This device is available in an 8-pin SO
package and is 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

o Simple and Complete Stereo Audio DAC

Solutions, No Controls to Set

o Sigma-Delta Stereo DACs with Built-In

Interpolation and Analog Output Filters

o I2S-Compatible Digital Audio Interface

o Clickless/Popless Operation

o 3.5V

P-P

Output Voltage Swing

o -87dB THD+N

o +87dB Dynamic Range

o Sample Frequencies (fS) from 2kHz to 50kHz

o Master Clock (MCLK) up to 25MHz

o Automatic Detection of Clock Ratio (MCLK/

LRCLK)

Ordering Information

Typical Operating Circuit

+Denotes a lead(Pb)-free/RoHS-compliant package. For lead­ed version, contact factory.

/V denotes an automotive-qualified part.

Pin Configuration

19-0550; Rev 1; 2/11

PART

MAX5556ESA+

MAX5556ESA/V+

TEMP

RANGE

-40°C to
+85°C

-40°C to
+85°C

PIN-

PACKAGE

8 SO

8 SO

DATA FORMAT

Left-justified I
data

Left-justified I
data

2

S

2

S

+5V

TOP VIEW

V

AUDIO

DECOMPRESSION

CLOCK

SDATA

SCLK

LRCLK

MCLK

SERIAL

INTERFACE

GND

DD

OUTL

OUTR

FILTER

FILTER

DAC

MAX5556

DAC

LINE-LEVEL

BUFFER

LINE-LEVEL

BUFFER

LEFT

OUTPUT

RIGHT

OUTPUT

SDATA

SCLK

LRCLK

+

1

2

MAX5556

3

4

87OUTL

V

DD

GND

6

OUTRMCLK

5

SO

Low-Cost Stereo Audio DAC

MAX5556

2 _______________________________________________________________________________________

VDDto GND...........................................................-0.3V to +6.0V

OUTL, OUTR, SDATA to GND................... -0.3V to (V

DD

+ 0.3V)

Current Any Pin (excluding V

DD

and GND)......................±10mA

OUTL, OUTR Shorted to GND....................................Continuous

SCLK, LRCLK, MCLK to GND ...............................-0.3V to +6.0V

Continuous Power Dissipation (T

A

= +70°C)

8-Pin SO (derate 5.88mW/°C above +70°C)...............471mW

Package Thermal Resistance (θ

JA

) ...............................170°C/W

Operating Temperature Range ...........................-40°C to +85°C

Junction Temperature......................................................+150°C

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

Soldering Temperature (reflow) .......................................+260°C

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VDD= +4.75V to +5.5V, V

GND

= 0V, R

OUT

_ = 10kΩ, C

OUT

_ = 10pF, 0dBFS sine-wave signal at 997Hz, f

LRCLK(fS

) = 48kHz, f

MCLK

= 12.288MHz, measurement bandwidth 10Hz to 20kHz, TA= -40°C to +85°C, outputs are unloaded, unless otherwise noted. Typical
values at V

DD

= +5V, TA= +25°C.) (Note 1)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings
only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the
specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

POWER SUPPLY

Supply Voltage V

Supply Current I

Power Dissipation

DYNAMIC PERFORMANCE (Note 2)

Dynamic Range, 16-Bit

Dynamic Range, 18-Bit to 24-Bit

Total Harmonic Distortion Plus
Noise, 16-Bit

Total Harmonic Distortion Plus
Noise, 18-Bit to 24-Bit

Interchannel Isolation 1kHz full-scale output (crosstalk) 94 dB

COMBINED DIGITAL AND INTEGRATED ANALOG FILTER FREQUENCY RESPONSE (Note 3)

Passband

Frequency Response/Passband
Ripple

Stopband 0.5465 f

Stopband Attenuation 52 dB

Group Delay

Passband Group-Delay Variation ∆t

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

DD

DD

THD+N

THD+N

t

gd

gd

Up to 48ksps 13 15

Static digital 6 8.5

Up to 48ksps 65 82.5

Static digital 30 44

Unweighted 84 86

A-weighted 86 90

Unweighted 87

A-weighted 91

0dBFS -86 -81

-20dBFS -67

-60dBFS -26 -24

0dBFS -87

-20dBFS -68

-60dBFS -27

-0.5dB corner 0.46

-3dB corner 0.49

-6dB corner 0.50

10Hz to 20kHz (fS = 48kHz) -0.025 +0.08

10Hz to 20kHz (fS = 44.1kHz) -0.025 +0.08

10Hz to 16kHz (f

20Hz to 20kHz ±0.4/f

= 32kHz) -6.000 +0.073

S

20/f

S

S

4.75 5.0 5.50 V

mA

mW

dB

dB

dB

dB

f

S

dB

S

s

s

Low-Cost Stereo Audio DAC

MAX5556

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

(VDD= +4.75V to +5.5V, V

GND

= 0V, R

OUT

_ = 10kΩ, C

OUT

_ = 10pF, 0dBFS sine-wave signal at 997Hz, f

LRCLK(fS

) = 48kHz, f

MCLK

= 12.288MHz, measurement bandwidth 10Hz to 20kHz, TA= -40°C to +85°C, outputs are unloaded, unless otherwise noted. Typical
values at V

DD

= +5V, TA= +25°C.) (Note 1)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

DC CHARACTERISTICS

Interchannel Gain Mismatch 0.1 0.4 dB

Gain Error -5 +5 %

Gain Drift 100 ppm/°C

ANALOG OUTPUTS

Full-Scale Output Voltage

DC Quiescent Output Voltage V

Minimum Load Resistance R

Maximum Load Capacitance C

Power-Supply Rejection Ratio PSRR

POP AND CLICK SUPPRESSION

Mute Attenuation 100 dB

Power-Up Until Bias Established Figure 11 360 ms

Valid Clock to Normal Operation Soft-start ramp time, Figure 12 (Note 5) 20 ms

DIGITAL AUDIO INTERFACE (SCLK, SDATA, MCLK, LRCLK)

Input-Voltage High V

Input-Voltage Low V

Input Leakage Current I

Input Capacitance 8pF

TIMING CHARACTERISTICS

Input Sample Rate f

MCLK Pulse-Width High t

EXTERNAL SCLK MODE

LRCLK Duty Cycle (Note 6) 25 75 %

SCLK Pulse-Width Low t

SCLK Pulse-Width High t

SCLK Period t

LRCLK Edge to SCLK Rising

LRCLK Edge to SCLK Rising

SDATA Valid to SCLK Rising

SCLK Rising to SDATA Hold Time t

V

OU T R

MCLKL

MCLKH

SCLKL

SCLKH

t

t

, V

OU T L

Q

L

L

IH

IL

IN

S

SCLK

SLRS

SLRH

t

SDS

SDH

3.25 3.5 3.75 V

Input code = 0 2.4 V

3kΩ

100 pF

V

RIPPLE

= 100mV

, frequency = 1kHz

P-P

66 dB

2.0 V

0.8 V

-10 +10 µA

2 50 kHz

MCLK/LRCLK = 512 10

MCLK/LRCLK = 384 20MCLK Pulse-Width Low t

MCLK/LRCLK = 256 20

MCLK/LRCLK = 512 10

MCLK/LRCLK = 384 20

MCLK/LRCLK = 256 20

20 ns

20 ns

1/(128

x f

)

S

20 ns

20 ns

20 ns

20 ns

P-P

ns

ns

ns

Low-Cost Stereo Audio DAC

MAX5556

4 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(VDD= +4.75V to +5.5V, V

GND

= 0V, R

OUT

_ = 10kΩ, C

OUT

_ = 10pF, 0dBFS sine-wave signal at 997Hz, f

LRCLK(fS

) = 48kHz, f

MCLK

= 12.288MHz, measurement bandwidth 10Hz to 20kHz, TA= -40°C to +85°C, outputs are unloaded, unless otherwise noted. Typical
values at V

DD

= +5V, TA= +25°C.) (Note 1)

Note 1: 100% production tested at T

A

= +85°C. Limits to -40°C are guaranteed by design.

Note 2: 0.5 LSB of triangular PDF dither added to data.
Note 3: Guaranteed by design, not production tested.
Note 4: PSRR test block diagram shown in Figure 1 denotes the test setup used to measure PSRR.
Note 5: Volume ramping interval starts from establishment of a valid MCLK to LRCLK ratio. Total time is proportional to the sample

rate (f

S

). 20ms based on 48ksps operation.

Note 6: In external SCLK mode, LRCLK duty cycles are not limited, provided all data formatting requirements are met. See Figure 4.
Note 7: The LRCLK duty cycle must be 50% ±1/2 MCLK period in internal SCLK mode.
Note 8: The SCLK/LRCLK ratio can be set to 32, 48, or 64, depending on the MCLK/LRCLK ratio selected. See Figure 4.

Figure 1. PSRR Test Block Diagram

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

INTERNAL SCLK MODE

LRCLK Duty Cycle (Note 7) 50 %

Internal SCLK Period t

LRCLK Edge to Internal SCLK

SDATA Valid to Internal SCLK
Rising Setup Time

ISCLK

t

ISCLKR

t

ISDS

t

ISDH

(Note 8) 1/f

t

MCLK period = t

MCLK

MCLK

SCLK

t

MCLK

+ 10

t

ISCLK

/2 ns

ns

ns

V

DD

LOUT, ROUT

SPECTRUM

ANALYZER

AUDIO SIGNAL

GENERATOR

AT 1kHz)

(100mV

P-P

DC POWER SUPPLY

(5VDC)

Z

G

SCLK

LRCLK

MCLK

ACTIVE CLOCKS

+

-

SD ATA

MAX5556

GND

Low-Cost Stereo Audio DAC

MAX5556

_______________________________________________________________________________________ 5

(VDD= +5V, V

GND

= 0V, R

OUT_

= 10kΩ, C

OUT_

= 10pF, TA = +25°C, unless otherwise noted.)

Typical Operating Characteristics

-0.25

-0.15

-0.20

-0.05

-0.10

0.05

0

0.10

0.20

0.15

0.25

0 0.1 0.2 0.3 0.4 0.5

PASSBAND RIPPLE

MAX5556 toc04

FREQUENCY (NORMALIZED TO fS)

AMPLITUDE (dB)

-100

-110

0

-10

-20

-30

-40

-50

-60

-70

-80

-90

-130

-120

-140
0 2 4 6 8 101214161820

FREQUENCY (kHz)

AMPLITUDE (dBr)

0dBFS FFT

MAX5556 toc05

16,000-SAMPLE FFT USING 1kHz INPUT

-100

-110

0

-10

-20

-30

-40

-50

-60

-70

-80

-90

-130

-120

-140
0 2 4 6 8 101214161820

FREQUENCY (kHz)

AMPLITUDE (dBr)

-60dBFS FFT

MAX5556 toc06

16,000-SAMPLE FFT USING 1kHz INPUT

-100

-80

-90

-60

-70

-40

-50

-30

-10

-20

0

0 0.2 0.3 0.40.1 0.5 0.6 0.7 0.90.8 1.0

STOPBAND REJECTION

MAX5556 toc01

FREQUENCY (NORMALIZED TO fS)

AMPLITUDE (dB)

-100

-80

-90

-60

-70

-40

-50

-30

-10

-20

0

0.40 0.44 0.48 0.52 0.56 0.60

TRANSITION BAND

MAX5556 toc02

FREQUENCY (NORMALIZED TO fS)

AMPLITUDE (dB)

-10

-7

-8

-9

-6

-5

-4

-3

-2

-1

0

0.40 0.440.42 0.46 0.48 0.50 0.52

TRANSITION BAND DETAIL

MAX5556 toc03

FREQUENCY (NORMALIZED TO fS)

AMPLITUDE (dB)

-100

-110

0

-10

-20

-30

-40

-50

-60

-70

-80

-90

-130

-120

-140
0 2 4 6 8 101214161820

FREQUENCY (kHz)

AMPLITUDE (dBr)

IDLE-CHANNEL NOISE FFT

MAX5556 toc07

16,000-SAMPLE FFT WITH NO INPUT

-100

-110

0

-10

-20

-30

-40

-50

-60

-70

-80

-90

-130

-120

-140
0 2 4 6 8 101214161820

FREQUENCY (kHz)

AMPLITUDE (dBr)

TWIN-TONE IMD FFT

MAX5556 toc08

16,000-SAMPLE FFT
WITH 13kHz AND
14kHz INPUT SIGNALS

-110

-100

-80

-90

-70

-60

-60 -40-50 -30 -20 -10 0

THD+N vs. AMPLITUDE

MAX5556 toc09

AMPLITUDE (dBFS)

THD+N (dBr)

UNWEIGHTED

A-WEIGHTED

INPUT = 1kHz 18-BIT SIGNAL

INTEGRATION BANDWIDTH = 20Hz TO 20kHz

Low-Cost Stereo Audio DAC

MAX5556

6 _______________________________________________________________________________________

(VDD= +5V, V

GND

= 0V, R

OUT_

= 10kΩ, C

OUT_

= 10pF, TA = +25°C, unless otherwise noted.)

Typical Operating Characteristics (continued)

-110

-100

-90

-80

-70

-60

0810462 1214161820

UNWEIGHTED THD+N

vs. FREQUENCY

MAX5556 toc10

FREQUENCY (kHz)

THD+N (dBr)

INPUT = 1kHz 18-BIT SIGNAL,
INTEGRATION BANDWIDTH = 20Hz TO 20kHz

0

20

10

40

30

60

50

70

02010 30 40 50

POWER DISSIPATION

vs. SAMPLE FREQUENCY

MAX5556 toc11

SAMPLE FREQUENCY (kHz)

POWER DISSIPATION (mW)

VDD = +5V
INPUT = 1kHz, 0dBFS SIGNAL

5

8

7

6

9

10

11

12

13

14

15

4.75 5.054.90 5.20 5.35 5.50

SUPPLY CURRENT

vs. SUPPLY VOLTAGE

MAX5556 toc12

SUPPLY VOLTAGE (V)

SUPPLY CURRENT (mA)

INPUT = 1kHz, 0dBFS SIGNAL
NORMAL OPERATION

STATIC DIGITAL INPUT
MUTE OPERATION

5

7

6

10

9

8

11

12

14

13

15

0 1.0 1.50.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5

SUPPLY CURRENT

vs. DIGITAL INPUT VOLTAGE (V

DIG

)

MAX5556 toc13

DIGITAL INPUT VOLTAGE (V

DIG

) (V)

SUPPLY CURRENT (mA)

V

IH

V

DIG

< V

IH

MUTE
ENGAGED

VDD = +5.5V
DC OUTPUT

V

DIG

< V

IH

NORMAL OPERATION

5ms/div

CLOCK-LOSS MUTE RECOVERY

V

OUT

1V/div

2.4V

MAX5556 toc14

CLOCK
RESTORED

LOSS
OF CLOCK

100ms/div

POWER-UP RESPONSE

V

OUT

1V/div

0V

MAX5556 toc15