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參數(shù)資料
| 型號： | LM4854MT |
| 元件分類： | 音頻放大器 |
| 英文描述： | AUDIO AMPLIFIER|DUAL|TSSOP|14PIN|PLASTIC |
| 中文描述： | 音頻放大器|雙|采用TSSOP | 14PIN |塑料 |
| 文件頁數(shù)： | 5/16頁 |
| 文件大?。?/td> | 619K |
| 代理商： | LM4854MT |
Electrical Characteristics
(Notes 2, 8) (Continued)
The following specifications apply for V
DD
= 3.0V, T
A
= 25C unless otherwise specified.
Symbol
Parameter
Conditions
LM4851
Units
(Limits)
Typical
(Note 5)
Limit
(Note 6)
THD+N
Total Harmonic Distortion Plus
Noise
R
OUT
and L
OUT
; f = 1kHz
P
OUT
= 20mW; R
L
= 32
SPKR
OUT
; f = 1kHz
P
OUT
= 300mW; R
L
= 8
R
OUT
and L
OUT
; f = 20Hz to 20kHz
P
OUT
= 20mW; R
L
= 32
SPKR
OUT
; f = 20Hz to 20kHz
P
OUT
= 250mW; R
L
= 8
A-weighted; f = 1kHz
V
RIPPLE
= 200mV
PP
; f = 217Hz
Input floating; Input referred
V
RIPPLE
= 200mV
PP
; f = 217Hz
Input terminated into 50
; Output referred
0.5
% (max)
1.0
% (max)
0.4
%
0.3
%
SNR
PSRR
Signal to Noise Ratio
Power Supply Rejection Ratio
90
70
dB
dB
62
dB
V
IH
Logic High Input Voltage
1.4
3.0
0.4
V (min)
V (max)
V (max)
dB
dB
V
IL
Logic Low Input Voltage
Digital Volume Range (R
IN
and
LR
IN
)
Digital Volume Stepsize
Stepsize Error
Phone In Volume
Input referred minimum gain
Input referred maximum gain
-40.5
+6
1.5
±
0.5
6
dB
dB
dB
BTL gain from
Phone In to SPKR
OUT
BTL gain from
Phone In to R
OUT
,L
OUT
Phone In Volume
0
dB
Phone In Input Impedance
20
15
25
37.5
62.5
20
20
30
20
20
20
50
50
DC
10
k
(min)
k
(max)
k
(min)
k
(max)
ns (min)
ns (min)
ns (min)
ns (min)
ns (min)
ns (min)
ns (min)
ns (min)
(min)
MHz (max)
R
IN
and L
IN
50
t
ES
t
EH
t
EL
t
DS
t
DH
t
CS
t
CH
t
CL
t
CLK
Enable Setup Time (ENB)
Enable Hold Time (ENB)
Enable Low Time (ENB)
Data Setup Time (DATA)
Data Hold Time (DATA)
Clock Setup Time (CLK)
Clock Logic High Time (CLK)
Clock Logic Low Time (CLK)
Clock Frequency
Note 2:
Absolute Maximum Rating indicate limits beyond which damage to the device may occur.
Note 3:
Operating Ratings indicate conditions for which the device is functional, but do not guarantee specific performance limits. For guaranteed specifications and
test conditions, see the Electrical Characteristics. The guaranteed specifications apply only for the test conditions listed. Some performance characteristics may
degrade when the device is not operated under the listed test conditions.
Note 4:
Human body model, 100pF discharged through a 1.5k
resistor.
Note 5:
Typical specifications are specified at +25C and represent the most likely parametric norm.
Note 6:
Datasheet min/max specification limits are guaranteed by design, test, or statistical analysis.
Note 7:
Machine Model ESD test is covered by specification EIAJ IC-121-1981. A 200pF cap is charged to the specified voltage, then discharged directly into the
IC with no external series resistor (resistance of discharge path must be under 50
).
Note 8:
All voltages are measured with respect to the ground pin, unless otherwise specified.
Note 9:
The given
θ
JA
and
θ
JC
is for an LM4851 mounted on a demonstration board with a 4 in
2
area of 1oz printed circuit board copper ground plane.
L
www.national.com
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