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參數(shù)資料
| 型號： | LM4921 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Low Voltage I2S 16-Bit Stereo DAC with Stereo Headphone Power Amplifiers and Volume Control |
| 中文描述： | 低電壓的I2S 16位立體聲DAC立體聲耳機功率放大器和音量控制 |
| 文件頁數(shù)： | 7/18頁 |
| 文件大?。?/td> | 849K |
| 代理商： | LM4921 |
Electrical Characteristics-Digital Inputs DV
DD
= 3.0V
(Notes 1, 2)
The following specifications apply for the circuit shown in Figure 1 unless otherwise specified. Limits apply for T
A
= 25C.
Symbol
Parameter
Conditions
LM4921
Units
(Limits)
Typical
(Note 6)
16
Limit
(Notes 7, 9)
Resolution
Audio Data Interface Format
Master Clock Frequency
Bits
I
2
S
f
MCLK
Standard, I
2
S, Left Justified
11.2896
(256FS)
44.1
MHz
f
CONV
V
IL
Sampling Clock Frequency Range
Digital Input: Logic Low Voltage
Level
Digital Input: Logic High Voltage
Level
SPI_ENB Setup Time
SPI_ENB Hold Time
SPI_ENB Low Time
SPI_Data Setup Time
SPI_Data Hold Time
SPI_CLK Setup Time
SPI_CLK High Pulse Width
SPI_CLK Low Pulse Width
SPI_CLK Frequency
I
2
S_CLK Period
I
2
S_CLK High Pulse Width
I
2
S_CLK Low Pulse Width
I
2
S_LRCLK Duty Cycle
I
2
S_LRCLK to I
2
S_CLK Setup Time
I
2
S_LRCLK to I
2
S_CLK Hold Time
I
2
S_Data to I
2
S_CLK Setup Time
I
2
S_Data to I
2
S_CLK Hold Time
48
kHz
0.3 X DV
DD
V (max)
V
IH
0.7 X DV
DD
V (min)
t
ES
t
EH
t
EL
t
DS
t
DH
t
CS
t
CH
t
CL
f
CLK
t
CLKI
2
S
t
HII
2
S
20
20
30
20
20
20
100
100
5
50
20
20
ns (min)
ns (min)
ns (min)
ns (min)
ns (min)
ns (min)
ns (min)
ns (min)
MHz (max)
ns (min)
ns (min)
ns (min)
%
ns (min)
ns (min)
ns (min)
ns (min)
t
LOI
2
S
50
t
SLRCLK
t
HLRCLK
t
SDI
2
S
t
HDI
2
S
20
20
20
20
Note 1:
Absolute Maximum Ratings
indicate limits beyond which damage to the device may occur.
Operating Ratings
indicate conditions for which the device is
functional, but do not guarantee specific performance limits.
Electrical Characteristics
state DC andAC electrical specifications under particular test conditions which
guarantee specific performance limits. This assumes that the device is within the Operating Ratings. Specifications are not guaranteed for parameters where no limit
is given, however, the typical value is a good indication of device performance.
Note 2:
All voltages are measured with respect to the GND pin, unless otherwise specified.
Note 3:
The maximum power dissipation must be derated at elevated temperatures and is dictated by T
JMAX
,
θ
JA
, and the ambient temperature T
A
. The maximum
allowable power dissipation is P
DMAX
= (T
JMAX
–T
A
)/
θ
JA
or the number given in Absolute Maximum Ratings, whichever is lower.
Note 4:
Human body model, 100pF discharged through a 1.5k
resistor.
Note 5:
Machine Model, 220pF – 240pF discharged through all pins.
Note 6:
Typicals are measured at 25C and represent the parametric norm.
Note 7:
Limits are guaranteed to National’s AOQL (Average Outgoing Quality Level).
Note 8:
Best operation is achieved by maintaining 3.0V
≤
AV
DD
≤
5.0V and 3.0V
≤
DV
DD
≤
5.0V.
Note 9:
Datasheet min/max specification limits are guaranteed by design, test, or statistical analysis.
L
www.national.com
7
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| LM4921ITL | 制造商:Texas Instruments 功能描述:16BIT STEREO DAC + AMP SMD 4921 |
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