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參數(shù)資料
| 型號： | LM4890 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | 1 Watt Audio Power Amplifier |
| 中文描述： | 1瓦音頻功率放大器 |
| 文件頁數(shù)： | 5/31頁 |
| 文件大?。?/td> | 1208K |
| 代理商： | LM4890 |
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Electrical Characteristics V
DD
= 3V
(Notes 1, 2, 8)
The following specifications apply for the circuit shown in Figure 1 unless otherwise specified. Limits apply for T
A
=
25C. (Continued)
Symbol
Parameter
Conditions
LM4890
Units
(Limits)
Typical
(Note 6)
0.31
Limit
(Notes 7, 9)
0.28
150
190
P
o
T
SD
Output Power ( 8
)
Thermal Shutdown Temperature
THD = 1% (max); f = 1kHz
W
170
C(min)
C(max)
%
dB(min)
THD+N
PSRR
Total Harmonic Distortion+Noise
Power Supply Rejection Ratio
(Note 14)
P
o
= 0.15Wrms; f = 1kHz
V
ripple
= 200mV sine p-p
Input terminated with 10 ohms to
ground
0.1
56 (f =
217Hz)
62 (f = 1kHz)
45
Electrical Characteristics V
DD
= 2.6V
The following specifications apply for for the circuit shown in Figure 1 unless otherwise specified. Limits apply for T
A
= 25C.
(Notes 1, 2, 8)
Symbol
Parameter
Conditions
LM4890
Units
(Limits)
Typical
(Note 6)
2.6
0.1
0.2
0.22
0.08
44 (f =
217Hz)
44 (f = 1kHz)
Limit
(Notes 7, 9)
I
DD
I
SD
P
0
Quiescent Power Supply Current
Shutdown Current
Output Power ( 8
)
Output Power ( 4
)
Total Harmonic Distortion+Noise
Power Supply Rejection Ratio
(Note 14)
V
IN
= 0V, I
o
= 0A, No Load
V
SHUTDOWN
= 0V
THD = 1% (max); f = 1 kHz
THD = 1% (max); f = 1 kHz
P
o
= 0.1Wrms; f = 1kHz
V
ripple
= 200mV sine p-p
Input Terminated with 10 ohms to
ground
mA (max)
μA (max)
W
W
%
dB
THD+N
PSRR
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 andAC 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 T
JMAX
,
θ
JA
, and the ambient temperature T
A
. The maximum
allowable power dissipation is P
DMAX
= (T
JMAX
–T
A
)/
θ
JA
or the number given inAbsolute Maximum Ratings, whichever is lower. For the LM4890, 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 I
SD
by a maximum of 2μA.
Note 9:
Datasheet min/max specification limits are guaranteed by design, test, or statistical analysis.
Note 10:
ROUT is measured from each of the output pins to ground. This value represents the parallel combination of the 10k ohm output resistors and the two 20k
ohm resistors.
Note 11:
If the product is in shutdown mode and V
exceeds 6V (to a max of 8V V
), then most of the excess current will flow through the ESD protection circuits.
If the source impedance limits the current to a max of 10 ma, then the part will be protected. If the part is enabled when V
is greater than 5.5V and less than 6.5V,
no damage will occur, although operational 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. All bumps must be connected to achieve
specified thermal resistance.
Note 13:
Maximum power dissipation (P
DMAX
) in the device occurs at an output power level significantly below full output power. P
DMAX
can be calculated using
Equation 1 shown in the Application section. It may also be obtained from the power dissipation graphs.
Note 14:
PSRR is a function of system gain. Specifications apply to the circuit in Figure 1 whereA
V
= 2. Higher system gains will reduce PSRR value by the amount
of gain increase. A system gain of 10 represents a gain increase of 14dB. PSRR will be reduced by 14dB and applies to all operating voltages.
L
www.national.com
5
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM48901 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Audio Power Amplifier Series |
| LM48901RL | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Audio Power Amplifier Series |
| LM48901RL/NOPB | 功能描述:音頻放大器 Quad Class D Spatial Array RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| LM48901RLX | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Audio Power Amplifier Series |
| LM48901RLX/NOPB | 功能描述:音頻放大器 Quad Class D Spatial Array RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
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