參數(shù)資料
型號(hào): LM4918LQ
廠商: NATIONAL SEMICONDUCTOR CORP
元件分類: 音頻控制
英文描述: Stereo Audio Amp with AGC Control
中文描述: 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, QCC32
封裝: LLP-32
文件頁(yè)數(shù): 3/17頁(yè)
文件大?。?/td> 646K
代理商: LM4918LQ
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
Storage Temperature
Input Voltage
Power Dissipation (Note 3)
ESD Susceptibility (Note 4)
ESD Susceptibility (Note 5)
Junction Temperature
6.0V
65C to +150C
0.3V to V
DD
+0.3V
Internally Limited
2000V
200V
150C
Thermal Resistance
θ
JA
(LLP)
See AN-1187 ’Leadless
Leadframe Packaging (LLP).’
51C/W
Operating Ratings
Temperature Range
T
MIN
T
A
T
MAX
Supply Voltage
40C
T
A
+85C
2.7V
V
DD
5.5V
Electrical Characteristics
Unless otherwise specified, all limits are guaranteed to T
j
= 25C, V
DD
= 5.0V.
Symbol
Parameter
Conditions
LM4918
Units
(Limits)
Typical
Limit
Common Portion
V
DD
Supply Voltage
2.7
5.5
25
2
2
V(min)
V(max)
mA (max)
μA (max)
mA (max)
V (min)
V (max)
I
DD
I
SDIH
I
std-by
V
ih
V
il
AGC Volume
Quiescent Supply Current
Shutdown Current
Stand-By Current
Logic High
Logic Low
V
in
= 0V, I
o
= 0A
V
SD
= V
DD
V
std-by
= V
dd
18
1
1
0.8xVdd
0.2xVdd
AGC Vol max
Max gain
Vol control in
^
4.5V
0
0
0.5
-0.5
-22
-26
db(max)
dB(min)
dB(max)
dB(min)
dB
AGC Vol min
Min gain
Vol control in
%
0.5V
-24
AGC Step Size
AGC Control Block
Vdisch
Idisch
Vos
Av Inv
Std-by Detect
.75
Voltage on Rdisch
Discharge Current on Chold
Offset Voltage
Inverting amp gain
1.2
320
10
0
V
nA
mV
dB
V
IN
= 0V
Vagcref = 4.5V
±
0.5
Vin
Input Sig Threshold Level
14
50
10
mVpk
mVpk
sec
Twait
Power Amp Block
Vos
Po
Wait time
C
_STBY
= 10μF
Output Offset Voltage
Output Power
Vin = 0V
THD = 1%, F = 1kHz, R
l
= 8
20Hz
%
f
^
20kHz, Avd = 2,
R
l
= 8
, Po = 1W
Vdd = 5V, Vripple = 200mVrms,
Rl = 8
, Cb = 1.0μF
F = 1kHz, Cb = 1.0μF
F = 1kHz, Cb = 1.0μF
Vdd = 5V, Po= 1.1W, R
l
= 8
10
1.1
0.3
40
1.0
mV(max)
W(min)
THD+N
Total Harmonic Distortion+Noise
%
PSRR
Power Supply Rejection Ratio
67
dB
Xtalk
Xtalk
SNR
Channel Separation in SE
Channel Separation in BTL
Signal to Noise Ratio
60
76
109
dB
dB
dB
L
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