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參數(shù)資料
| 型號： | LM4834MS |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 音頻控制 |
| 英文描述： | 1.75W Audio Power Amplifier with DC Volume Control and Microphone Preamp |
| 中文描述： | 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO28 |
| 封裝： | SSOP-28 |
| 文件頁數(shù)： | 3/12頁 |
| 文件大?。?/td> | 443K |
| 代理商： | LM4834MS |
Electrical Characteristics for Line/Headphone Amplifier
(Notes 1, 2)
The following specifications apply for V
DD
= 5V. Limits apply for T
A
= 25C.
Symbol
Parameter
Conditions
LM4834
Units
(Limits)
Typical
(Note 6)
70
95
0.05
Limit
(Note 7)
P
O
Output Power
THD = 0.1%; f = 1kHz; R
L
= 32
THD = 10%; f = 1 kHz; R
L
= 32
V
OUT
= 4V
P-P
, 20 Hz
<
f
<
20 kHz,
R
L
= 10k
, A
VD
= 1
C
B
= 1.0 μF, f =120 Hz,
V
RIPPLE
= 200 mVrms
V
DD
=5V, P
OUT
=75mW, R
L
= 32
,
A-Wtd Filter
mW
mW
%
THD+N
Total Harmonic Distortion+Noise
PSRR
Power Supply Rejection Ratio
30
dB
SNR
Signal to Noise Ratio
102
dB
Electrical Characteristics for Bridged Speaker Amplifer
(Notes 1, 2)
The following specifications apply for V
DD
= 5V, unless otherwise noted. Limits apply for T
A
= 25C.
Symbol
Parameter
Conditions
LM4834
Units
(Limits)
Typical
(Note 6)
5
1.1
Limit
(Note 7)
30
1.0
V
OS
P
O
Output Offset Voltage
Output Power
V
IN
= 0V
THD = 0.5% (max);f = 1 kHz;
R
L
= 8
THD+N = 10%;f = 1 kHz; R
L
= 8
P
O
= 1W, 20 Hz
<
f
<
20 kHz,
R
L
= 8
, A
VD
= 2
P
O
= 340 mW, R
L
= 32
C
B
= 1.0 μF, f = 120 Hz,V
RIPPLE
=
200 mVmrs
V
DD
= 5V, P
OUT
= 1.1W, R
L
= 8
,
A-Wtd Filter
mV (max)
W (min)
1.5
0.3
W
%
THD+N
Total Harmonic Distortion+Noise
1.0
58
%
dB
PSRR
Power Supply Rejection Ratio
SNR
Signal to Noise Ratio
93
dB
Note 1:
All voltages are measured with respect to the ground pins, unlessotherwise specified. All specifications are tested using the typical application as shown in
Figure 1
Note 2:
Absolute Maximum Ratingsindicate limits beyond which damage to the device may occur. Operating Ratingsindicate conditionsfor which the device is func-
tional, but do not guarantee specific performance limits. Electrical Characteristicsstate DC andAC electrical specifications under particular test conditions which guar-
antee specific performance limits. This assumes that the deviceis 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 3:
The maximum power dissipation must be derated at elevated temperatures and is dictated by T
,
θ
, and the ambient temperature T
. The maximum
allowable power dissipation is P
= (T
T
)/
θ
JA
.For the LM4834MS, T
JMAX
= 150C, and the typical junction-to-ambient thermal resistance, when board
mounted, is 95C/W assuming the MSA028CB package.
Note 4:
Human body model, 100 pF discharged through a 1.5 k
resistor.
Note 5:
Machine Model, 220 pF–240 pF 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).
3
www.national.com
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