參數(shù)資料
型號: LM4883SQ
廠商: NATIONAL SEMICONDUCTOR CORP
元件分類: 音頻/視頻放大
英文描述: Dual 2.1W Audio Amplifier Plus Stereo Headphone
中文描述: 0.4 W, 2 CHANNEL, AUDIO AMPLIFIER, QCC24
封裝: LLP-24
文件頁數(shù): 6/23頁
文件大小: 1244K
代理商: LM4883SQ
Electrical Characteristics for Single-Ended Operation (3V)
(Notes 3, 7, 13)
The following specifications apply for V
DD
= 3V unless otherwise specified. Limits apply for T
A
= 25C.
Symbol
Parameter
Conditions
LM4883
Units
(Limits)
Typical
(Note 8)
35
125
150
Limit
(Note 9)
P
O
Output Power
THD+N = 0.5%, f = 1 kHz, R
L
= 32
THD+N = 1%, f = 1 kHz, R
L
= 8
THD+N = 10%, f = 1 kHz, R
L
= 8
P
O
= 35mW, 20Hz
f
20kHz,
R
L
= 32
Input Floating, 217Hz
V
ripple
= 200mV
p-p
C
B
= 1μF, R
L
= 8
Input Floating, 1kHz
V
ripple
= 200mV
p-p
C
B
= 1μF, R
L
= 8
Input grounded, 217Hz
V
ripple
= 200mV
p-p
C
B
= 1μF, R
L
= 32
Input grounded, 1kHz
V
ripple
= 200mV
p-p
C
B
= 1μF, R
L
= 32
f = 1kHz, C
B
= 1.0μF
1kHz, A-weighted
mW
mW
mW
THD+N
Total Harmonic Distortion+Noise
.015
%
PSRR
Power Supply Rejection Ratio
71
dB
79
dB
65
dB
72
dB
X
TALK
V
NO
Channel Separation
Output Noise Voltage
80
11
dB
μV
Note 3:
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 operates within the Operating Ratings. Specifications are not guaranteed for parameters where
no limit is given. The typical value however, is a good indication of device performance.
Note 4:
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
. For the LM4883SQ, T
JMAX
= 150C.
Note 5:
Human body model, 100 pF discharged through a 1.5 k
resistor.
Note 6:
Machine model, 220 pF–240 pF discharged through all pins.
Note 7:
All voltages are measured with respect to the ground (GND) pins, unless otherwise specified.
Note 8:
Typicals are specified at 25C and represent the parametric norm.
Note 9:
Datasheet min/max specification limits are guaranteed by design, test, or statistical analysis.
Note 10:
The quiescent power supply current depends on the offset voltage when a practical load is connected to the amplifier.
Note 11:
Output power is measured at the device terminals.
Note 12:
When driving 3
or 4
loads and operating on a 5V supply, the LM4883SQ must be mounted to a circuit board that has a minimum of 2.5in
2
of exposed,
uninterrupted copper area connected to the SQ package’s exposed DAP.
Note 13:
All measurements taken from Applications Diagram (Figure 3).
L
www.national.com
6
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