LM4550B National Semiconductor Corporation, LM4550B Datasheet - Page 4

• Manufacturer Part Number: LM4550B
• 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

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Analog to Digital Converters
Digital to Analog Converters
THD
D
Analog Output Section
A
A
THD+N
Z
Z
Digital I/O (Note 9)
V
V
V
V
I
I
Cin
I
Digital Timing Specifications (Note 9)
F
T
T
F
T
T
T
T
L
L
DR
Electrical Characteristics
48 kHz, single codec configuration, (primary mode) unless otherwise noted. Limits apply for T
is 1 Vrms unless otherwise specified. (Continued)
OUT
OUT
BC
BCP
CH
SYNC
SP
SH
SL
DSETUP
T
S
M
IH
IL
OH
OL
Symbol
Resolution
Dynamic Range (Note 9)
Frequency Response
Resolution
Dynamic Range (Note 9)
Total Harmonic Distortion
Frequency Response
Group Delay (Note 9)
Out of Band Energy (Note 10)
Stop Band Rejection
Discrete Tones
Step Size
Mute Attenuation(Note 9)
Headphone Amplifier Total
Harmonic Distortion plus Noise
Output Impedance (Note 9)
Output Impedance (Note 9)
High level input voltage
Low level input voltage
High level output voltage
Low level output voltage
Input Leakage Current
Tri state Leakage Current
AC-Link I/O capacitance
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 for codec data input
Parameter
(Notes 1, 5) The following specifications apply for AV
-60 dB Input THD+N, A-Weighted
-1 dB Bandwidth
-60 dB Input THD+N, A-Weighted
V
Sample Freq. = 48 kHz
0 dB to -46.5 dB
Loopthrough Mode (Note 8), R
f = 1 kHz, P
HP_OUT_L, HP_OUT_R
LINE_OUT_L, LINE_OUT_R,
MONO_OUT
I
I
AC Link inputs
High impedance AC Link outputs
SDout, BitClk, SDin, Sync, Reset# only
AC Link outputs
Variation of BIT_CLK duty cycle from
50%
SDATA_OUT to falling edge of BIT_CLK
O
O
IN
= −2.5 mA.
= 2.5 mA.
= -3 dB, f = 1 kHz, R
4
out
Conditions
= 50 mW
L
= 10 kΩ
L
= 32 Ω,
A
= 25˚C. The reference for 0 dB
DD
(Note 6)
Typical
20-21 k
12.288
0.01
0.36
0.02
0.65
81.4
20.8
19.5
220
-40
-96
1.5
1.3
3.5
= 5V, DV
18
90
20
18
89
70
86
48
4
5
LM4550B
(Note 7)
DD
0.65 x
0.35 x
0.90 x
0.10 x
DV
DV
DV
DV
Limit
2.75
±
±
±
500
7.5
86
82
10
1
10
10
20
= 3.3V, Fs =
DD
DD
DD
DD
pF (max)
dB (min)
dB (min)
% (max)
(Limits)
ns (min)
V (max)
V (max)
V (min)
V (min)
Units
(max)
MHz
Bits
kHz
Bits
kHz
mA
ms
Hz
dB
dB
dB
dB
dB
µA
µA
ns
µs
µs
µs
%
%
Ω
Ω