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LM4863MT 参数 Datasheet PDF下载

LM4863MT图片预览
型号: LM4863MT
PDF下载: 下载PDF文件 查看货源
内容描述: 双2.2W音频放大器加上立体声耳机功能 [Dual 2.2W Audio Amplifier Plus Stereo Headphone Function]
分类和应用: 音频放大器
文件页数/大小: 16 页 / 515 K
品牌: NSC [ National Semiconductor ]
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Electrical Characteristics for Bridged-Mode Operation (Notes 3, 4) (Continued)  
=
=
The following specifications apply for VDD 5V unless otherwise specified. Limits apply for TA 25˚C.  
Symbol  
Parameter  
Conditions  
LM4863  
Units  
(Limits)  
Typical  
Limit  
(Note  
13)  
(Note  
14)  
=
=
XTALK  
SNR  
Channel Separation  
f
1 kHz, CB 1.0 µF  
90  
98  
dB  
dB  
=
VDD 5V, PO = 1.1W, RL = 8Ω  
Signal To Noise Ratio  
Electrical Characteristics for Single-Ended Operation (Notes 3, 4)  
=
=
The following specifications apply for VDD 5V unless otherwise specified. Limits apply for TA 25˚C.  
Symbol  
Parameter  
Conditions  
LM4863  
Units  
(Limits)  
Typical  
Limit  
(Note  
13)  
(Note  
14)  
=
VOS  
PO  
Output Offset Voltage  
Output Power  
VIN 0V  
5
50  
75  
mV (max)  
mW (min)  
mW  
=
=
=
THD 0.5%, f 1 kHz, RL 32Ω  
85  
=
=
=
THD+N 1%, f 1 kHz, RL 8Ω  
340  
440  
0.2  
=
=
=
THD+N 10%, f 1 kHz, RL 8Ω  
mW  
=
=
THD+N Total Harmonic Distortion+Noise AV −1, PO 75 mW, 20 Hz f 20 kHz,  
%
=
RL 32Ω  
=
=
PSRR  
Power Supply Rejection Ratio  
CB 1.0 µF, VRIPPLE 200 mV  
,
52  
dB  
RMS  
=
f
1 kHz  
1 kHz, CB 1.0 µF  
=
=
XTALK  
SNR  
Channel Separation  
f
60  
95  
dB  
dB  
=
VDD 5V, PO = 340mW, RL = 8Ω  
Signal To Noise Ratio  
Note 3: All voltages are measured with respect to the ground pins, 2, 7, and 15, unless otherwise specified.  
Note 4: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is func-  
tional, but do not guarantee specific performance limits. Electrical Characteristics state DC and AC electrical specifications under particular test conditions which guar-  
antee 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.  
2
Note 5: The θ given is for an MXA20A package whose exposed-DAP is soldered to an exposed 2in piece of 1 ounce printed circuit board copper.  
JA  
Note 6: The θ given is for an MXA20A package whose exposed-DAP is not soldered to any copper.  
JA  
Note 7: When driving 3loads from a 5V supply, the LM4863MTE must be mounted to the circuit board and forced-air cooled (450 linear-feet per minute).  
Note 8: When driving 4loads from a 5V supply, the LM4863MTE must be mounted to the circuit board.  
Note 9: Output power is measured at the device terminals.  
Note 10: The maximum power dissipation must be derated at elevated temperatures and is dictated by T  
JMAX  
, θ , and the ambient temperature T . The maximum  
JA  
A
=
=
150˚C. For the θ s for different packages, please see the Application Informa-  
JA  
allowable power dissipation is P  
(T  
− T )/θ . For the LM4863, T  
JA JMAX  
DMAX  
JMAX  
A
tion section or the Absolute Maximum Ratings section.  
Note 11: Human body model, 100 pF discharged through a 1.5 kresistor.  
Note 12: Machine model, 220 pF–240 pF discharged through all pins.  
Note 13: Typicals are measured at 25˚C and represent the parametric norm.  
Note 14: Limits are guaranteed to National’s AOQL (Average Outgoing Quality Level).  
Note 15: The quiescent power supply current depends on the offset voltage when a practical load is connected to the amplifier.  
Truth Table for Logic Inputs  
SHUTDOWN  
HP-IN  
LM4863 MODE  
Low  
Low  
Bridged  
Low  
High  
Low  
Single-Ended  
High  
LM4863 Shutdown  
LM4863 Shutdown  
High  
High  
www.national.com  
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