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參數(shù)資料
| 型號： | LM4870MX |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 1.1 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO16 |
| 封裝： | SOIC-16 |
| 文件頁數(shù)： | 4/11頁 |
| 文件大小： | 283K |
| 代理商： | LM4870MX |
Absolute Maximum Ratings (Note 2)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage
6.0V
Storage Temperature
65C to +150C
Input Voltage
0.3V to V
DD + 0.3V
Power Dissipation
Internally limited
ESD Susceptibility (Note 4)
3000V
ESD Susceptibility (Note 5)
250V
Junction Temperature
150C
Soldering Information
Small Outline Package
Vapor Phase (60 sec.)
215C
Infrared (15 sec.)
220C
Thermal Resistance
φ
JC(typ)
35C/W
φ
JA(typ)
100C/W
See AN-450
“Surface Mounting and their Effects on Product
Reliability” for other methods of soldering surface mount de-
vices.
Operating Ratings
Temperature Range
T
MIN ≤ TA ≤ TMAX
20C
≤ T
A ≤ +85C
Supply Voltage
2.0V
≤ V
DD ≤ 5.5V
Electrical Characteristics
(Notes 1, 2) The following specifications apply for V
DD = 5V, RL =8 unless otherwise specified. Limits apply for TA = 25C.
Symbol
Parameter
Conditions
LM4870
Units
(Limits)
Typical
Limit
(Note 6)
(Note 7)
V
DD
Supply Voltage
2.0
V (min)
5.5
V (max)
I
DD
Quiescent Power Supply Current
V
O = 0V, IO = 0A
7.0
15.0
mA (max)
I
SD
Shutdown Current
V
pin2 =VDD
0.4
A
V
OS
Output Offset Voltage
V
IN = 0V
10
50.0
mV (max)
P
O
Output Power
THD+N = 0.5% (max); f = 1 kHz
1.1
1.0
W (min)
THD+N
Total Harmonic Distortion + Noise
P
O = 1 Wrms; 20 Hz ≤ f ≤ 20 kHz
0.25
%
PSRR
Power Supply Rejection Ratio
V
DD = 4.9V to 5.1V
60
dB
V
od
Output Dropout Voltage
V
IN = 0V to 5V
0.6
1.0
V (max)
V
IH
HP-IN High Input Voltage
HP-SENSE = 0V to 4V
2.5
V
IL
HP-IN Low Input Voltage
HP-SENSE = 4V to 0V
2.5
V
OH
HP-SENSE High Output Voltage
I
O = 500 A
2.8
2.5
V (min)
V
OL
HP-SENSE Low Output Voltage
I
O = 500 A
0.2
0.8
V (max)
Note 1: All voltages are measured with respect to the ground pins, unless otherwise specified.
Note 2: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is func-
tional, but do not guarantee specific performance limits. Electrical Characteristics state DC and AC electrical specifications under particular test conditions which guar-
antee 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 3: The maximum power dissipation must be derated at elevated temperatures and is dictated by TJMAX, θJA , and the ambient temperature TA. The maximum
allowable power dissipation is PDMAX =(TJMAX T A)/θJA or the number given in the Absolute Maximum Ratings, whichever is lower. For the LM4870, TJMAX =
+150C, and the typical junction-to-ambient thermal resistance, when board mounted, is 100C/W.
Note 4: Human body model, 100 pF discharged through a 1.5 k
resistor.
Note 5: Machine Model, 200 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).
LM4870
www.national.com
2
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