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參數(shù)資料
| 型號(hào)： | LM4904ITL/NOPB |
| 廠(chǎng)商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類(lèi)： | 音頻／視頻放大 |
| 英文描述： | 1.07 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA8 |
| 封裝： | MICRO SMD-8 |
| 文件頁(yè)數(shù)： | 13/18頁(yè) |
| 文件大?。?/td> | 670K |
| 代理商： | LM4904ITL/NOPB |
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Electrical Characteristics V
DD = 2.6V
(Notes 1, 2)
The following specifications apply for the circuit shown in Figure 1, unless otherwise specified. Limits apply for T
A = 25C.
Symbol
Parameter
Conditions
LM4904
Units
(Limits)
Typical
Limit
(Notes 7, 9)
I
DD
Quiescent Power Supply Current
V
IN = 0V, Io = 0A, No Load
2.0
mA (max)
V
IN = 0V, Io = 0A, 8
Load
3.0
mA (max)
I
SD
Shutdown Current
V
0.1
A (max)
V
SDIH
Shutdown Voltage Input High
1.0
V (min)
V
SDIL
Shutdown Voltage Input Low
0.9
V (max)
V
OS
Output Offset Voltage
5
50
mV (max)
R
OUT
Resistor Output to GND (Note 10)
8.5
9.7
k
(max)
7.0
k
(min)
P
o
Output Power ( 8
)
THD = 1% (max);f=1kHz
275
mW
(4
)
THD = 1% (max);f=1kHz
340
T
WU
Wake-up time
70
mS (max)
THD+N
Total Harmonic Distortion+Noise
P
o = 0.15 Wrms; f = 1kHz
0.1
%
PSRR
Power Supply Rejection Ratio
V
ripple = 200mV sine p-p
Input terminated with 10
51 (f =
217Hz)
51 (f = 1kHz)
dB (min)
Note 1: All voltages are measured with respect to the ground pin, 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
functional, but do not guarantee specific performance limits. Electrical Characteristics state DC and AC electrical specifications under particular test conditions which
guarantee 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–TA)/θJA or the number given in Absolute Maximum Ratings, whichever is lower. For the LM4904, see power derating
curves for additional information.
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).
Note 8: For micro SMD only, shutdown current is measured in a Normal Room Environment. Exposure to direct sunlight will increase ISD by a maximum of 2A.
Note 9: Datasheet min/max specification limits are guaranteed by design, test, or statistical analysis.
Note 10: RROUT is measured from the output pin to ground. This value represents the parallel combination of the 10k output resistors and the two 20k resistors.
Note 11: If the product is in Shutdown mode and VDD exceeds 6V (to a max of 8V VDD), then most of the excess current will flow through the ESD protection circuits.
If the source impedance limits the current to a max of 10mA, then the device will be protected. If the device is enabled when VDD is greater than 5.5V and less than
6.5V, no damage will occur, although operation life will be reduced. Operation above 6.5V with no current limit will result in permanent damage.
Note 12: All bumps have the same thermal resistance and contribute equally when used to lower thermal resistance. The LM4904ITL demo board (views featured
in the Application Information section) has two inner layers, one for VDD and one for GND. The planes each measure 600mils x 600mils (15.24mm x 15.24mm)
and aid in spreading heat due to power dissipation within the IC.
Note 13: Maximum power dissipation in the device (PDMAX) occurs at an output power level significantly below full output power. PDMAX can be calculated using
Equation 1 shown in the Application Information section. It may also be obtained from the power dissipation graphs.
LM4904
www.national.com
4
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