48 kHz, single codec configuration, (primary mode) unless otherwise noted. Limits apply for T

is 1 Vrms unless otherwise specified. (Continued)

Symbol

Parameter

Conditions

LM4549B

Units

(Limits)

Typical

(Note 6)

Limit

(Note 7)

Analog to Digital Converters

Resolution

18

Bits

Dynamic Range (Note 9)

-60 dB Input THD+N, A-Weighted

90

86

dB (min)

Frequency Response

-1 dB Bandwidth

20

kHz

Digital to Analog Converters

Resolution

18

Bits

Dynamic Range (Note 9)

-60 dB Input THD+N, A-Weighted

89

82

dB (min)

THD

Total Harmonic Distortion

V

Ω

0.01

%

Frequency Response

20 - 21 k

Hz

Group Delay (Note 9)

Sample Frequency = 48 kHz

0.36

1

ms (max)

Out of Band Energy (Note 10)

-40

dB

Stop Band Rejection

70

dB

D

T

Discrete Tones

-96

dB

Analog Output Section

A

S

Step Size

0 dB to -46.5 dB

1.5

dB

A

M

Mute Attenuation

86

dB

Z

OUT

Output Impedance (Note 9)

All Analog Outputs

220

Ω

Digital I/O (Note 9)

V

IH

High level input voltage

0.65 x

DV

DD

V (min)

V

IL

Low level input voltage

0.35 x

DV

DD

V (max)

V

OH

High level output voltage

I

0.90 x

DV

DD

V (min)

V

OL

Low level output voltage

I

0.10 x

DV

DD

V (max)

I

L

Input Leakage Current

AC Link inputs

µA

I

L

Tri state Leakage Current

High impedance AC Link outputs

µA

C

IN

AC-Link I/O capacitance(Note 9)

SDout, BitClk, SDin, Sync, Reset# only

4

7.5

pF (max)

I

DR

Output drive current

AC Link outputs

5

mA

Digital Timing Specifications (Note 9)

F

BC

BIT_CLK frequency

12.288

MHz

T

BCP

BIT_CLK period

81.4

ns

T

CH

BIT_CLK high

Variation of BIT_CLK duty cycle from

50%

% (max)

F

SYNC

SYNC frequency

48

kHz

T

SP

SYNC period

20.8

µs

T

SH

SYNC high pulse width

1.3

µs

T

SL

SYNC low pulse width

19.5

µs

T

DSETUP

Setup Time for codec data input

SDATA_OUT to falling edge of BIT_CLK

3.5

10

ns (min)

T

DHOLD

Hold Time for codec data input(Note

9)

Hold time of SDATA_OUT from falling

edge of BIT_CLK

5.3

10

ns (min)

T

SSETUP

Setup Time for codec SYNC

input(Note 9)

SYNC to falling edge of BIT_CLK

3.8

10

ns (min)

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