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參數(shù)資料
| 型號： | LM4919 |
| 廠商： | National Semiconductor Corporation |
| 元件分類： | 音頻放大器 |
| 英文描述： | 1.5V, Mono 85mW BTL Output, 14mW Stereo Headphone Audio Amplifier |
| 中文描述： | 1.5V的，單聲道85mW BTL輸出，消耗14mW功率立體聲耳機音頻放大器 |
| 文件頁數(shù)： | 4/15頁 |
| 文件大小： | 568K |
| 代理商： | LM4919 |
Absolute Maximum Ratings
(Note 1)
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
Power Dissipation (Note 2)
ESD Susceptibility(Note 3)
ESD Susceptibility (Note 4)
3.6V
65C to +150C
0.3V to V
DD
+0.3V
Internally limited
2000V
200V
Junction Temperature
Thermal Resistance
θ
JA
(typ) MUB10A
150C
175C/W
Operating Ratings
Temperature Range
T
MIN
≤
T
A
≤
T
MAX
Supply Voltage
40C
≤
T
A
≤
85C
0.9V
≤
V
DD
≤
2.5V
Electrical Characteristics for the LM4919
(Notes 1, 5)
The following specifications apply for the circuit shown in Figure 4 operating with V
DD
= 1. 5V, unless otherwise
specified. Limits apply for T
A
= 25C.
Symbol
Parameter
Conditions
LM4919
Units
(Limits)
Typical
(Note 6)
Limit
(Note 7)
0.9
2.5
1.4
V
DD
Supply Voltage (Notes 10, 11)
V (min)
V (max)
mA (max)
μA
mV (max)
I
DD
I
SD
V
OS
Quiescent Power Supply Current
Shutdown Current
Output Offset Voltage
V
IN
= 0V, I
O
= 0A, R
L
=
∞
(Note 8)
V
SHUTDOWN
= GND
BTL
f = 1kHz
R
L
= 8
BTL, THD+N = 1%
R
L
= 16
SE, THD+N = 1%
R
L
= 8
, BTL, P
O
= 25mW, f = 1kHz
R
L
= 16
, SE, P
O
= 5mW, f = 1kHz
20Hz to 20kHz, A-weighted SE
20Hz to 20kHz, A-weighted BTL
V
MUTE
= 0, SE
R
L
= 16
, SE
V
RIPPLE
= 200mV
P-P
C
BYPASS
= 4.7μF, R
L
= 8
f = 1kHz, BTL
V
RIPPLE
= 200mV
P-P
sine wave
C
BYPASS
= 4.7μF, R
L
= 16
f = 1kHz, SE
0.9
0.02
5
50
P
O
Output Power (Note 9)
85
14
0.2
0.07
10
15
15
55
70
mW (min)
mW (min)
THD+N
Total Harmonic Distortion + Noise
0.5
% (max)
V
NO
Output Voltage Noise
μV
RMS
μV
RMS
μA
dB
I
MUTE
Crosstalk
Mute Current
PSRR
Power Supply Rejection Ratio
70
dB
72
dB
V
IH
V
IL
Control Logic High
Control Logic Low
0.9
0.3
V
V
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:
The maximum power dissipation is dictated by T
JMAX
,
θ
JA
, and the ambient temperature T
A
and must be derated at elevated temperatures. The maximum
allowable power dissipation is P
DMAX
= (T
JMAX
T
A
)/
θ
JA
. For the LM4919, T
JMAX
= 150C. For the
θ
JA
s, please see the Application Information section or the
Absolute Maximum Ratings section.
Note 3:
Human body model, 100pF discharged through a 1.5k
resistor.
Note 4:
Machine model, 220pF–240pF discharged through all pins.
Note 5:
All voltages are measured with respect to the ground (GND) pins unless otherwise specified.
Note 6:
Typicals are measured at 25C and represent the parametric norm.
Note 7:
Datasheet min/max specification limits are guaranteed by design, test, or statistical analysis.
Note 8:
The quiescent power supply current depends on the offset voltage when a practical load is connected to the amplifier.
Note 9:
Output power is measured at the device terminals.
L
www.national.com
4
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