Rainbow Electronics MAX5559 User Manual

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, automotive rear-seat entertainment and other general consumer audio applications. These DACs feature 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–MAX5559 receive input data over a flexible 3-wire interface, supporting I

S-compatible, left-justified, 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 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–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

♦ I2S-Compatible Digital Audio Interface (MAX5556)

♦ Clickless/Popless Operation

♦ Output Voltage Swing: 3.5V

P-P

♦ -87dB THD+N

♦ +87dB Dynamic Range

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

♦ Master Clock (MCLK) up to 25MHz

♦ Automatic Detection of Clock Ratio (MCLK/

LRCLK)

MAX5556–MAX5559

Ordering Information

Typical Operating Circuit

19-0550; Rev 0; 5/06

Low-Cost Stereo Audio DACs

________________________________________________________________

Maxim Integrated Products

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.

Pin Configuration

PART

MAX5556ESA 8 SO S8-5 Left-justified I M A X5 5 5 7 E S A* 8 SO S8-5 Left-justified data M A X5 5 5 8 E S A* 8 SO S8-5 Ri g ht- j usti fi ed 16- Bi t d ata M A X5 5 5 9 E S A* 8 SO S8-5 Ri g ht- j usti fi ed 18- Bi t d ata

PIN PA C K A G E

PKG

CODE

DATA FORMAT

S data

+5V

AUDIO

DECOMPRESSION

CLOCK

SDATA

SCLK

LRCLK

MCLK

SERIAL

INTERFACE

MAX5556–MAX5559

GND

DAC

OUTL

OUTR

LINE-LEVEL

BUFFER

LINE-LEVEL

BUFFER

LEFT

OUTPUT

RIGHT

OUTPUT

TOP VIEW

SDATA

SCLK

LRCLK

87OUTL

MAX5556–

MAX5559

GND

OUTRMCLK

MAX5556–MAX5559

Low-Cost Stereo Audio DACs

2 ________________________________________________________________________________________

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

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

+ 0.3V)

Current Into Any Pin (excluding V

and GND)...............±10mA

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

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

Continuous Power Dissipation (T

= +70°C)

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

Package Thermal Resistance (θ

) ...............................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

ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VDD= +4.75V to +5.5V, 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, unless otherwise specified. T

= -40°C to +85°C, unless otherwise noted.

Outputs are unloaded, unless otherwise noted. Typical values at V

= +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.

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

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

THD+N

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

20 / f

4.75 5.0 5.50 V

MAX5556–MAX5559

Low-Cost Stereo Audio DACs

_______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(VDD= +4.75V to +5.5V, 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, unless otherwise specified. T

= -40°C to +85°C, unless otherwise noted.

Outputs are unloaded, unless otherwise noted. Typical values at V

= +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 14 360 ms

Valid Clock to Normal Operation Soft-start ramp time, Figure 15 (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

SDATA Valid to SCLK Rising

SCLK Rising to SDATA Hold Time t

OU T R

, V

OU T L

MCLKL

MCLKH

SCLKL

SCLKH

SCLK

SLRS

SLRH

SDS

SDH

3.25 3.5 3.75 V

Input code = 0 2.4 V

3kΩ

100 pF

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

1 / (128

x f

)

20 ns

P-P

MAX5556–MAX5559

Low-Cost Stereo Audio DACs

4 ________________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(VDD= +4.75V to +5.5V, 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, unless otherwise specified. T

= -40°C to +85°C, unless otherwise noted.

Outputs are unloaded, unless otherwise noted. Typical values at V

= +5V, TA= +25°C.) (Note 1)

Note 1: 100% production tested at T

= +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

). 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 Figures

4–7.

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 device and the MCLK/LRCLK ratio selected. See

Figures 4–7.

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

ISCLK

ISCLKR

ISDS

ISDH

(Note 8) 1 / f

MCLK period = t

MCLK

/ 2 ns

SCLK

ISCLK

+ 10 ns

MCLK

LOUT, ROUT

SPECTRUM ANALYZER

AUDIO SIGNAL

GENERATOR

AT 1kHz)

(100mV

P-P

DC POWER SUPPLY

(5VDC)

SCLK

LRCLK

MCLK

ACTIVE CLOCKS

SD ATA

MAX5556–MAX5559

GND

MAX5556–MAX5559

Low-Cost Stereo Audio DACs

_______________________________________________________________________________________

(VDD= +5V, 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

0.10

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

-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

-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 0.2 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

0.40 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

0.40 0.440.42 0.46 0.48 0.50 0.52

TRANSITION BAND DETAIL

MAX5556 toc03

FREQUENCY (NORMALIZED TO fS)

AMPLITUDE (dB)

-100

-110

-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

-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

MAX5556–MAX5559

Low-Cost Stereo Audio DACs

6 ________________________________________________________________________________________

(VDD= +5V, 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

02010 30 40 50

POWER DISSIPATION

vs. SAMPLE FREQUENCY

MAX5556 toc11

SAMPLE FREQUENCY (kHz)

POWER DISSIPATION (mW)

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

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

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)

DIG

< V

MUTE ENGAGED

VDD = +5.5V DC OUTPUT

DIG

< V

NORMAL OPERATION

5ms/div

CLOCK-LOSS MUTE RECOVERY

OUT

1V/div

2.4V

MAX5556 toc14

CLOCK RESTORED

LOSS OF CLOCK

100ms/div

POWER-UP RESPONSE

OUT

1V/div

MAX5556 toc15

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