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參數(shù)資料
| 型號： | LM4548VH |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 消費家電 |
| 英文描述： | AC ’97 Rev 2 Codec with Sample Rate Conversion and National 3D Sound |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP48 |
| 封裝： | 7 X 7 MM, 1.40 MM HEIGHT, TQFP-48 |
| 文件頁數(shù)： | 2/18頁 |
| 文件大小： | 322K |
| 代理商： | LM4548VH |
Absolute Maximum Ratings
(Note 3)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage
Storage Temperature
Input Voltage
ESD Susceptibility (Note 5)
pins 27, 28
pin 3
ESD Susceptibility (Note 6)
pin 3
Junction Temperature
6.0V
40C to +150C
0.3V to V
DD
+0.3V
2500V
1500V
750V
200V
100V
150C
Soldering Information
TQFP Package
Vapor Phase (60 sec.)
Infrared (15 sec.)
See AN-450
″
Surface Mounting and their Effects on
Product Reliability
″
for other methods of
soldering surface mount devices.
θ
JA
(typ)— VBH48A
215C
220C
74C/W
Operating Ratings
Temperature Range
T
MIN
≤
T
A
≤
T
MAX
Analog Supply Range
Digital Supply Range
40C
≤
T
A
≤
85C
4.2V
≤
AV
DD
≤
5.5V
3.0V
≤
DV
DD
≤
5.5V
Electrical Characteristics
(Notes 1, 3)
The following specifications apply for AV
= 5V, DV
= 5V, Fs = 48kHz, single codec configuration, unless otherwise noted.
Limits apply for T
A
= 25C. The reference for 0dB is 1Vrms unless otherwise specified.
Symbol
Parameter
Conditions
LM4548
Units
(Limits)
Typical
(Note 7)
Limit
(Note 8)
4.2
5.5
3.0
5.5
AV
DD
Analog Supply Range
V (min)
V (max)
V (min)
V (max)
mA
DV
DD
Digital Supply Range
D
IDD
Digital Quiescent Power Supply
Current
D
VDD
= 5V
43
D
VDD
= 3.3V
20
53
mA
mA
A
IDD
Analog Quiescent Power Supply
Current
Digital Shutdown Current
Analog Shutdown Current
Reference Voltage
Power Supply Rejection Ratio
Analog Loopthru Mode
I
DSD
I
ASD
V
REF
PSRR
500
30
2.23
40
μA
μA
V
dB
Dynamic Range (Note 2)
CD Input to Line Output, -60dB Input
THD+N, A-Weighted
V
O
= -3dB, f = 1kHz, R
L
= 10k
97
90
dB (min)
THD
Analog Input Section
V
IN
Total Harmonic Distortion
0.01
0.02
% (max)
Line Input Voltage
Mic Input with 20dB Gain
Mic Input with 0dB Gain
Crosstalk
Input Impedance(Note 2)
Input Capacitance
Interchannel Gain Mismatch
1
Vrms
Vrms
Vrms
dB
k
(min)
pF
dB
0.1
1
-95
40
15
0.01
Xtalk
Z
IN
C
IN
CD Left to Right
10
CD Left to Right
Record Gain Amplifier - A/D
A
S
Mixer Section
A
S
A
M
Analog to Digital Converters
Resolution
Step Size
0dB to 22.5dB
1.5
dB
Step Size
Mute Attenuation
+12dB to -34.5dB
1.5
86
dB
dB
18
Bits
www.national.com
2
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