參數(shù)資料
型號: LM4893ITLX/NOPB
廠商: NATIONAL SEMICONDUCTOR CORP
元件分類: 音頻/視頻放大
英文描述: 1.1 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA9
封裝: MICRO, BUMP, SMD-9
文件頁數(shù): 17/22頁
文件大小: 687K
代理商: LM4893ITLX/NOPB
Electrical Characteristics V
DD = 3.0V (Notes 1, 2)
The following specifications apply for the circuit shown in Figure 1 unless otherwise specified. Limits apply for T
A =
25C. (Continued)
Symbol
Parameter
Conditions
LM4893
Units
(Limits)
Typical
Limit
(Notes 7, 8)
N
OUT
Output Noise
A-Weighted; Measured across 8
BTL
Input terminated with 10
to
ground
26
V
RMS
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
LM4893
Units
(Limits)
Typical
Limit
(Notes 7, 8)
I
DD
Quiescent Power Supply Current
V
IN = 0V, 8
BTL
3.5
mA
I
SD
Shutdown Current
V
shutdown = GND
0.1
A
V
OS
Output Offset Voltage
5
mV
P
o
Output Power
THD = 1% (max); f = 1kHz
R
L =8
250
mW
R
L =4
350
THD+N
Total Harmonic Distortion+Noise
P
o = 0.1Wrms; f = 1kHz
0.1
%
PSRR
Power Supply Rejection Ratio
V
ripple = 200mVsine p-p, CB =
1.0F
Input terminated with 10
to
ground
55 (f = 1kHz)
55 (f =
217Hz)
dB
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 LM4893, 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, 220pF–240pF 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: 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 part will be protected. If the part is enabled when VDD is above 6V, circuit performance will
be curtailed or the part may be permanently damaged.
Note 10: All bumps have the same thermal resistance and contribute equally when used to lower thermal resistance.
Note 11: Maximum power dissipation (PDMAX) in the device occurs at an output power level significantly below full output power. PDMAX can be calculated using
Equation 1 shown in the Application section. It may also be obtained from the power dissipation graphs.
LM4893
www.national.com
4
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