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LM4873 Datasheet(PDF) 5 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part No. LM4873
Description  Dual 2.1W Audio Amplifier Plus Stereo Headphone Function
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Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
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LM4873 Datasheet(HTML) 5 Page - National Semiconductor (TI)

 
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Electrical Characteristics for Bridged-Mode Operation (Notes 3, 15) (Continued)
The following specifications apply for V
DD= 5V unless otherwise specified. Limits apply for TA= 25˚C.
Symbol
Parameter
Conditions
LM4873
Units
(Limits)
Typical
Limit
(Note 16)
(Note 17)
THD+N = 10%, f = 1kHz (Note 20)
LM4873MTE-1, R
L =3
3.0
W
LM4873LQ, R
L =3
3.0
W
LM4873MTE-1, R
L =4
2.6
W
LM4873LQ, R
L =4
2.6
W
LM4873, R
L =8
1.5
W
THD+N = 1%, f = 1kHz, R
L =32
0.34
W
THD+N
Total Harmonic Distortion+Noise
20Hz
≤ f ≤ 20kHz, A
VD =2
LM4873MTE-1, R
L =4
Ω,P
O =2W
0.3
LM4873LQ, R
L =4
Ω,P
O =2W
LM4873, R
L =8
Ω,P
O = 1W
0.3
%
PSRR
Power Supply Rejection Ratio
V
DD = 5V, VRIPPLE = 200mVRMS,RL =8
Ω,
C
B = 1.0µF
67
dB
X
TALK
Channel Separation
f = 1kHz, C
B = 1.0µF
80
dB
SNR
Signal To Noise Ratio
V
DD = 5V, PO = 1.1W, RL =8
97
dB
Electrical Characteristics for Single-Ended Operation (Notes 3, 15)
The following specifications apply for V
DD= 5V unless otherwise specified. Limits apply for TA= 25˚C.
Symbol
Parameter
Conditions
LM4873
Units
(Limits)
Typical
Limit
(Note 16)
(Note 17)
V
OS
Output Offset Voltage
V
IN = 0V
5
50
mV (max)
P
O
Output Power
THD+N = 0.5%, f = 1 kHz, R
L =32
85
75
mW (min)
THD+N = 1%, f = 1 kHz, R
L =8
340
mW
THD+N = 10%, f = 1 kHz, R
L =8
440
mW
THD+N
Total Harmonic Distortion+Noise
A
V = −1, PO = 75mW, 20Hz
≤ f ≤ 20kHz,
R
L =32
0.2
%
PSRR
Power Supply Rejection Ratio
C
B = 1.0µF, VRIPPLE = 200mV RMS,
f = 1kHz
52
dB
X
TALK
Channel Separation
f = 1kHz, C
B = 1.0µF
60
dB
SNR
Signal To Noise Ratio
V
DD = 5V, PO = 340mW, RL =8
94
dB
Note 3: 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 operates within the Operating Ratings. Specifications are not guaranteed for parameters where
no limit is given. The typical value however, is a good indication of device performance.
Note 4: The maximum power dissipation must be derated at elevated temperatures and is dictated by TJMAX, θ JA, and the ambient temperature TA. The maximum
allowable power dissipation is PDMAX =(TJMAX −T A)/θJA. For the LM4873, TJMAX = 150˚C. For the θJAs for different packages, please see the Application
Information section or the Absolute Maximum Ratings section.
Note 5: Human body model, 100 pF discharged through a 1.5 k
Ω resistor.
Note 6: Machine model, 220 pF–240 pF discharged through all pins.
Note 7: The given
θJA is for an LM4873 packaged in an MXA20A with the Exposed-DAP soldered to an exposed 2in2 area of 1oz printed circuit board copper.
Note 8: The given
θJA is for an LM4873 packaged in an MXA20A with the Exposed-DAP soldered to an exposed 1in2 area of 1oz printed circuit board copper.
Note 9: The given
θJA is for an LM4873 packaged in an MXA20A with the Exposed-DAP not soldered to printed circuit board copper.
Note 10: The given
θJA is for an LM4873 packaged in an MXA28A with the Exposed-DAP soldered to an exposed 2in2 area of 1oz printed circuit board copper.
Note 11: The given
θJA is for an LM4873 packaged in an MXA28A with the Exposed-DAP soldered to an exposed 1in2 area of 1oz printed circuit board copper.
Note 12: The given
θJA is for an LM4873 packaged in an MXA28A with the Exposed-DAP not soldered to printed circuit board copper.
Note 13: The given
θJA is for an LM4873 packaged in an LQA24A with the Exposed-DAP soldered to an exposed 2in2 area of 1oz printed circuit board copper.
Note 14: The
θJA is specified for an LM4873 packaged in a BLA20AAB or TLA20AAA with their four ground connections soldered to a 3in2, 1oz copper plane.
Note 15: All voltages are measured with respect to the ground (GND) pins, unless otherwise specified.
Note 16: Typicals are specified at 25˚C and represent the parametric norm.
Note 17: Datasheet min/max specification limits are guaranteed by design, test, or statistical analysis.
www.national.com
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