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參數(shù)資料
| 型號： | LM4925 |
| 廠商： | National Semiconductor Corporation |
| 元件分類： | 音頻放大器 |
| 英文描述： | Single Audio Amplifier |
| 中文描述： | 單音頻放大器 |
| 文件頁數(shù)： | 5/15頁 |
| 文件大?。?/td> | 1046K |
| 代理商： | LM4925 |
Electrical Characteristics V
DD
= 1.8V
(Notes 1, 5)
The following specifications apply for the circuit shown in Figure 2 for Single Ended Outputs (A
V
= 2.5V) and Figure 3
for BTL Outputs (A
V-BTL
= 2), unless otherwise specified. Limits apply for T
A
= 25C.
Symbol
Parameter
Conditions
LM4925
Units
(Limits)
Typical
(Note 6)
0.9
0.05
2
Limit
(Note 7)
1.6
1
10
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
mA (max)
μA (max)
mV (max)
P
O
Output Power (Note 9)
R
L
= 8
, BTL, Fig. 3,
THD+N = 1%, f = 1kHz
R
L
= 16
, Fig. 2, SE per Channel,
THD+N = 1%, f = 1kHz
R
L
= 8
, BTL, P
O
= 50mW,
Fig. 3, f = 1kHz
R
L
= 16
, SE, P
O
= 5mW per channel,
Fig.2, f = 1kHz
20Hz to 20kHz, A-weighted,
Input Referred,
Single Ended Output, Fig. 2
R
L
= 16
, Fig. 2
V
RIPPLE
= 200mV
P-P
sine wave
C
BYPASS
= 4.7μF, R
L
= 8
f = 100Hz, BTL, Fig. 3
V
RIPPLE
= 200mV
P-P
sine wave
C
BYPASS
= 4.7μF, R
L
= 16
f = 100Hz, SE, Fig. 2
1.5V
≤
V
DD
≤
3.6V
1.5V
≤
V
DD
≤
3.6V
1V
PP
Reference,
R
i
= 20k, R
f
= 50k
120
90
mW (min)
10
7
mW (min)
THD+N
Total Harmonic Distortion + Noise
0.15
0.5
% (max)
0.1
V
NO
Output Voltage Noise
10
μV
RMS
Crosstalk
58
dB
PSRR
Power Supply Rejection Ratio
70
dB
68
dB
V
IH
V
IL
Mute
Attenuation
Control Logic High
Control Logic Low
0.7V
DD
0.3V
DD
70
V (min)
V (max)
dB (min)
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
and must be derated at elevated temperatures. The maximum
allowable power dissipation is P
DMAX
= (T
JMAX
T
A
)/
θ
JA
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
5
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