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參數(shù)資料
| 型號(hào)： | LM4834MS/NOPB |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 音頻控制 |
| 英文描述： | 2 CHANNEL(S), VOLUME CONTROL CIRCUIT, PDSO28 |
| 封裝： | SSOP-28 |
| 文件頁(yè)數(shù)： | 8/14頁(yè) |
| 文件大?。?/td> | 497K |
| 代理商： | LM4834MS/NOPB |
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Electrical Characteristics for Microphone Preamp and Power
Supply (Continued)
(Notes 1, 2)
The following specifications apply forV
DD = 5V unless otherwise noted. Limits apply for TA= 25C.
Symbol
Parameter
Conditions
LM4834
Units
(Limits)
Typical
Limit
V
S
Mic Power Supply
R
L =1k
, Bias In = 2.5V
2.5
V (min)
Electrical Characteristics for Line/Headphone Amplifier
(Notes 1, 2)
The following specifications apply for V
DD = 5V. Limits apply for TA = 25C.
Symbol
Parameter
Conditions
LM4834
Units
(Limits)
Typical
Limit
P
O
Output Power
THD = 0.1%; f = 1kHz; R
L =32
70
mW
THD=10%;f=1 kHz; R
L =32
95
mW
THD+N
Total Harmonic Distortion+Noise
V
OUT =4VP-P,20Hz <f < 20 kHz,
R
L = 10k
,A
VD =1
0.05
%
PSRR
Power Supply Rejection Ratio
C
B = 1.0 F, f =120 Hz,
V
RIPPLE = 200 mVrms
30
dB
SNR
Signal to Noise Ratio
V
DD=5V, POUT=75mW, RL =32
,
A-Wtd Filter
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 TA= 25C.
Symbol
Parameter
Conditions
LM4834
Units
(Limits)
Typical
Limit
V
OS
Output Offset Voltage
V
IN = 0V
5
30
mV (max)
P
O
Output Power
THD = 0.5% (max);f = 1 kHz;
R
L =8
1.1
1.0
W (min)
THD+N = 10%;f = 1 kHz; R
L =8
1.5
W
THD+N
Total Harmonic Distortion+Noise
P
O = 1W, 20 Hz< f < 20 kHz,
R
L =8
,A
VD =2
0.3
%
P
O = 340 mW, RL =32
1.0
%
PSRR
Power Supply Rejection Ratio
C
B = 1.0 F, f = 120 Hz,VRIPPLE =
200 mVmrs
58
dB
SNR
Signal to Noise Ratio
V
DD = 5V, POUT = 1.1W, RL=8
,
A-Wtd Filter
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 Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditionsfor which the device is
functional, but do not guarantee specific performance limits. Electrical Characteristicsstate DC and AC electrical specifications under particular test conditions which
guarantee 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 TJMAX, θJA, and the ambient temperature TA. The maximum
allowable power dissipation is PDMAX =(TJMAX TA)/θJA.For the LM4834MS, TJMAX = 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).
LM4834
www.national.com
3
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