lm4550 National Semiconductor Corporation, lm4550 Datasheet - Page 4

• Manufacturer Part Number: lm4550
• Description: Ac ?97 Rev 2.1 Multi-channel Audio Codec With Stereo Headphone Amplifier, Sample Rate Conversion And National 3d Sound
• Manufacturer: National Semiconductor Corporation

www.national.com
Analog to Digital Converters
Digital to Analog Converters
THD
D
Output Volume and Amplifier Section
A
A
THD+N
Digital I/O (Note 2)
V
V
V
V
I
I
I
Digital Timing Specifications (Note 2)
F
T
T
F
T
T
T
T
T
T
L
L
DR
BC
BCP
CH
SYNC
SP
SH
SL
SETUP
HOLD
RISE
T
S
M
IL
HI
OH
OL
Electrical Characteristics
48kHz, single codec configuration, unless otherwise noted. Limits apply for T
otherwise specified. (Continued)
Symbol
Resolution
Dynamic Range (Note 2)
Frequency Response
Resolution
Dynamic Range (Note 2)
Total Harmonic Distortion
Frequency Response
Group Delay (Note 2)
Out of Band Energy
Stop Band Rejection
Discrete Tones
Step Size
Mute Attenuation
Headphone Amplifier Total Harmonic
Distortion plus Noise
Low level input voltage
High level input voltage
High level output voltage
Low level output voltage
Input Leakage Current
Tri state Leakage Current
Output drive current
BIT_CLK frequency
BIT_CLK period
BIT_CLK high
SYNC frequency
SYNC period
SYNC high pulse width
SYNC low pulse width
Setup Time
Hold Time
Rise Time
Parameter
(Notes 1, 3) The following specifications apply for AV
-60dB Input THD+N, A-Weighted
-1dB Bandwidth
-60dB Input THD+N, A-Weighted
V
0dB to -46.5dB
Loop thru Mode R
P
AC Link inputs
High impedance AC Link outputs
AC Link outputs
Variation of BIT_CLK period from 50%
duty cycle
SDATA_IN, SDATA_OUT to falling edge
of BIT_CLK
Hold time of SDATA_IN, SDATA_OUT
from falling edge of BIT_CLK
BIT_CLK, SYNC, SDATA_IN or
SDATA_OUT
IN
out
= -3dB, f=1kHz, R
=50mW
4
Conditions
L
=32, F=1KHz,
L
= 10kΩ
A
= 25˚C. The reference for 0dB is 1Vrms unless
DD
(Note 7)
20 - 21k
Typical
12.288
0.01
0.02
81.4
20.8
19.5
-40
-96
1.5
1.3
= 5V, DV
18
90
20
18
89
70
86
48
5
LM4550
(Note 8)
DD
0.30 x
DVDD
0.40 x
DVDD
0.50 x
DVDD
0.20 x
DVDD
Limit
±
±
±
86
85
15
2
5
6
10
10
20
= 5V, Fs =
mS (max)
nS (max)
dB (min)
dB (min)
% (max)
nS (min)
nS (min)
(Limits)
V (max)
V (max)
V (min)
V (min)
Units
MHz
Bits
kHz
Bits
kHz
mA
Hz
dB
dB
dB
dB
dB
µA
µA
nS
µS
µS
µS
%
%