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参数资料
型号： LM3875MDC
厂商： NATIONAL SEMICONDUCTOR CORP
元件分类： 音频／视频放大
英文描述： 56 W, 1 CHANNEL, AUDIO AMPLIFIER, UUC
封装： DIE
文件页数： 15/21页
文件大小： 582K
代理商： LM3875MDC
Absolute Maximum Ratings (Notes 1, 2)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage |V
+|+|V| (No Signal)
94V
Supply Voltage |V
+|+|V| (Input Signal)
84V
Common Mode Input Voltage
(V
+ or V) and
|V
+|+|V|
≤ 80V
Differential Input Voltage
60V
Output Current
Internally Limited
Power Dissipation (Note 3)
125W
ESD Susceptibility (Note 4)
2500V
Junction Temperature (Note 5)
150C
Soldering Information
T package (10 seconds)
260C
Storage Temperature
40C to +150C
Thermal Resistance
θ
JC
1C/W
θ
JA
43C/W
Operating Ratings (Notes 1, 2)
Temperature Range
T
MIN ≤ TA ≤ TMAX
20C
≤ T
A ≤ +85C
Supply Voltage |V
+|+|V|
20V to 84V
Note: Operation is guaranteed up to 84V, however, distortion may be intro-
duced from the SPiKe Protection Circuitry when operating above 70V if
proper thermal considerations are not taken into account. Refer to the Ther-
mal Considerations section for more information. (See SPiKe Protection Re-
sponse)
Electrical Characteristics (Notes 1, 2)
The following specifications apply for V
+ = +35V, V = 35V with R
L =8 unless otherwise specified. Limits apply for TA =
25C.
Symbol
Parameter
Conditions
LM3875
Units
(Limits)
Typical
(Note 6)
Limit
(Note 7)
|V
+|+|V|
Power Supply Voltage
20
84
V (Min)
V (Max)
**P
O
Output Power (Continuous Average)
THD + N = 0.1% (Max)
f = 1 kHz, f = 20 kHz
56
40
W (Min)
Peak P
O
Instantaneous Peak Output Power
100
W
THD + N
Total Harmonic Distortion Plus Noise
40W, 20 Hz
≤ f ≤ 20 kHz
A
V =26dB
0.06
%
**SR
Slew Rate (Note 9)
V
IN = 1.414 Vrms,f=10kHz
Square-wave, R
L =2k
11
5
V/s
(Min)
*I+
Total Quiescent Power Supply
Current
V
CM = 0V, VO = 0V, Io =0mA
30
70
mA
(Max)
*V
OS
Input Offset Voltage
V
CM = 0V, Io =0mA
110
mV
(Max)
I
B
Input Bias Current
V
CM = 0V, Io =0mA
0.2
1
A
(Max)
I
OS
Input Offset Current
V
CM = 0V, Io =0mA
0.01
0.2
A
(Max)
I
o
Output Current Limit
|V
+|=|V| = 10V, t
on = 10 ms, VO = 0V
6
4
A(Min)
*V
od
Output Dropout Voltage
|V
+V
o
|, V+ = 20V, I
o = +100 mA
|V
oV
|, V = 20V, I
o = 100 mA
1.6
2.7
5
V (Max)
*PSRR
Power Supply Rejection Ratio
V
+ = 40V to 20V, V = 40V,
V
cm = 0V, Io =0 mA
V
+ = 40V, V = 40V to 20V,
V
cm = 0V, Io =0 mA
120
85
dB (Min)
*CMRR
Common Mode Rejection Ratio
V
+ = 60V to 20V, V = 20V to 60V,
V
cm = 20V to 20V, Io =0 mA
120
80
dB (Min)
*A
VOL
Open Loop Voltage Gain
|V
+|=|V| = 40V, R
L =2 k, VO = 60V
120
90
dB (Min)
GBWP
Gain-Bandwidth Product
|V
+|=|V| = 40V
f
O = 100 kHz, VIN = 50 mVrms
82
MHz
(Min)
**e
IN
Input Noise
IHF A Weighting Filter
R
IN = 600 (Input Referred)
2.0
8.0
V
(Max)
LM3875
www.national.com
3
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