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參數(shù)資料
| 型號： | LM4549BVHX/NOPB |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 消費家電 |
| 英文描述： | LM4549B AC '97 Rev 2.1 Multi-Channel Audio Codec with Sample Rate Conversion and National 3D Sound; Package: LQFP; No of Pins: 48; Qty per Container: 1000/Reel |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP48 |
| 封裝： | 7 X 7 MM, 1.40 MM HEIGHT, LQFP-48 |
| 文件頁數(shù)： | 23/28頁 |
| 文件大?。?/td> | 927K |
| 代理商： | LM4549BVHX/NOPB |
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Electrical Characteristics (Notes 1, 5) The following specifications apply for AV
DD = 5V, DVDD = 3.3V, Fs =
48 kHz, single codec configuration, (primary mode) unless otherwise noted. Limits apply for T
A= 25C. The reference for 0 dB
is 1 Vrms unless otherwise specified. (Continued)
Symbol
Parameter
Conditions
LM4549B
Units
(Limits)
Typical
Limit
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
IN =-3dB,f=1 kHz, RL =10k
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
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
O = 2.5 mA.
0.90 x
DV
DD
V (min)
V
OL
Low level output voltage
I
O = 2.5 mA.
0.10 x
DV
DD
V (max)
I
L
Input Leakage Current
AC Link inputs
±10
A
I
L
Tri state Leakage Current
High impedance AC Link outputs
±10
A
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%
±20
% (max)
F
SYNC
SYNC frequency
48
kHz
T
SP
SYNC period
20.8
s
T
SH
SYNC high pulse width
1.3
s
T
SL
SYNC low pulse width
19.5
s
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
Hold time of SDATA_OUT from falling
edge of BIT_CLK
5.3
10
ns (min)
T
SSETUP
Setup Time for codec SYNC
SYNC to falling edge of BIT_CLK
3.8
10
ns (min)
LM4549B
www.national.com
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| LM4550BVHX/NOPB | LM4550B AC '97 Rev 2.1 Multi-Channel Audio Codec with Stereo Headphone Amplifier, Sample Rate Conversion and National 3D Sound; Package: LQFP; No of Pins: 48; Qty per Container: 1000/Reel |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM4549VH | 制造商:Texas Instruments 功能描述: |
| LM4549VHX | 制造商:Texas Instruments 功能描述: |
| LM4550 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:AC ’97 Rev 2.1 Multi-Channel Audio Codec with Stereo Headphone Amplifier, Sample Rate Conversion and National 3D Sound |
| LM4550B | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:AC 97 Rev 2.1 Multi-Channel Audio Codec with Stereo Headphone Amplifier, Sample Rate Conversion and National 3D Sound |
| LM4550BVH | 功能描述:接口—CODEC RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉(zhuǎn)換速率:48 kSPs 接口類型:I2C ADC 數(shù)量:2 DAC 數(shù)量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel |
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