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参数资料
| 型号： | LM4918LQ/NOPB |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 音频控制 |
| 英文描述： | 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, QCC32 |
| 封装： | LLP-32 |
| 文件页数： | 11/17页 |
| 文件大小： | 646K |
| 代理商： | LM4918LQ/NOPB |
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 (Note 3)
Internally Limited
ESD Susceptibility (Note 4)
2000V
ESD Susceptibility (Note 5)
200V
Junction Temperature
150C
Thermal Resistance
θ
JA (LLP)
51C/W
See AN-1187 ’Leadless
Leadframe Packaging (LLP).’
Operating Ratings
Temperature Range
T
MIN
≤ T
A
≤ T
MAX
40C
≤ T
A
≤ +85C
Supply Voltage
2.7V
≤ V
DD
≤ 5.5V
Electrical Characteristics Unless otherwise specified, all limits are guaranteed to T
j = 25C, VDD = 5.0V.
Symbol
Parameter
Conditions
LM4918
Units
(Limits)
Typical
Limit
Common Portion
V
DD
Supply Voltage
2.7
5.5
V(min)
V(max)
I
DD
Quiescent Supply Current
V
in = 0V, Io = 0A
18
25
mA (max)
I
SDIH
Shutdown Current
V
SD =VDD
1
2
A (max)
I
std-by
Stand-By Current
V
std-by =Vdd
1
2
mA (max)
V
ih
Logic High
0.8xVdd
V (min)
V
il
Logic Low
0.2xVdd
V (max)
AGC Volume
AGC Vol max
Max gain
Vol control in ^ 4.5V
0
0.5
-0.5
db(max)
dB(min)
AGC Vol min
Min gain
Vol control in % 0.5V
-24
-22
-26
dB(max)
dB(min)
AGC Step Size
.75
dB
AGC Control Block
Vdisch
Voltage on Rdisch
1.2
V
Idisch
Discharge Current on Chold
320
nA
Vos
Offset Voltage
V
IN =0V
10
mV
Av Inv
Inverting amp gain
Vagcref = 4.5V
0
±0.5
dB
Std-by Detect
Vin
Input Sig Threshold Level
14
50
mVpk
Twait
Wait time
C
_STBY = 10F
10
sec
Power Amp Block
Vos
Output Offset Voltage
Vin = 0V
10
40
mV(max)
Po
Output Power
THD = 1%, F = 1kHz, R
l =8
1.1
1.0
W(min)
THD+N
Total Harmonic Distortion+Noise
20Hz % f ^ 20kHz, Avd = 2,
R
l =8
,Po=1W
0.3
%
PSRR
Power Supply Rejection Ratio
Vdd = 5V, Vripple = 200mVrms,
Rl=8
, Cb = 1.0F
67
dB
Xtalk
Channel Separation in SE
F = 1kHz, Cb = 1.0F
60
dB
Xtalk
Channel Separation in BTL
F = 1kHz, Cb = 1.0F
76
dB
SNR
Signal to Noise Ratio
Vdd = 5V, Po= 1.1W, R
l =8
109
dB
LM4918
www.national.com
3
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