* Not recommended for new designs. Contact NSC Audio Marketing
LD Package
01260730
Top View
Order Number LM4864LD,
See NS Package Number LDA10A
DIE LAYOUT (B-STEP)
01260740
LM4864 MDC MWC
725MW AUDIO POWER AMPLIFIER WITH SHUTDOWN MODE
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2
LM4864
Absolute Maximum Ratings
(Note 2)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage
Storage Temperature
Input Voltage
Power Dissipation (Note 3)
ESD Susceptibility (Note 4)
ESD Susceptibility (Note 5)
Junction Temperature
Soldering Information
Small Outline Package
Vapor Phase (60 sec.)
Infrared (15 sec.)
215˚C
220˚C
6.0V
−65˚C to +150˚C
−0.3V to V
DD
+
0.3V
Internally limited
2000V
200V
150˚C
Thermal Resistance
θ
JC
(MSOP)
θ
JA
(MSOP)
θ
JC
(SOP)
θ
JA
(SOP)
θ
JC
(DIP)
θ
JA
(DIP)
*
*
56˚ C/W
210˚C/W
35˚C/W
170˚C/W
37˚C/W
107˚C/W
63˚C/W
12˚C/W
θ
JA
(LD) (Note 11)
θ
JC
(LD) (Note 11)
* Not recommended for new designs. Contact NSC Audio
Marketing.
Operating Ratings
Temperature Range
T
MIN
≤
T
A
≤
T
MAX
Supply Voltage
−40˚C
≤
T
A
≤
+85˚C
2.7V
≤
V
DD
≤
5.5V
See AN-450 “Surface Mounting and their Effects on
Product Reliability” for other methods of soldering surface
mount devices.
Electrical Characteristics V
DD
= 5V
(Note 1) (Note 2)
The following specifications apply for V
DD
= 5V, for all available packages, unless otherwise specified. Limits apply for T
A
=
25˚C
LM4864
Symbol
Parameter
Conditions
Typical
(Note 6)
3.6
0.7
5
625
725
300
675
550
0.7
50
300
Limit
(Notes 7,
8)
6.0
5
50
Units
(Limits)
mA (max)
µA (max)
mV (max)
mW (min)
mW (min)
mW (min)
mW (min)
mW
%
dB
I
DD
I
SD
V
OS
P
O
Quiescent Power Supply Current
Shutdown Current
Output Offset Voltage
Output Power
V
IN
= 0V, I
O
= 0A (Note 9)
V
PIN1
= V
DD
V
IN
= 0V
THD = 1% (max); f = 1 kHz; R
L
= 4Ω;
LM4864LD (Note 11)
THD = 1% (max); f = 1 kHz; R
L
= 8Ω;
LM4864LD (Note 11)
THD = 1% (max); f = 1 kHz; R
L
= 8Ω;
LM4864MM (Note 10)
THD = 1% (max); f = 1 kHz; R
L
= 8Ω;
LM4864M and LM4864N
*
THD+N = 1%; f = 1 kHz; R
L
= 16Ω;
THD+N
PSRR
Total Harmonic Distortion+Noise
Power Supply Rejection Ratio
P
O
= 300 mWrms; A
VD
= 2; R
L
= 8Ω;
20 Hz
≤
f
≤
20 kHz, BW
<
80kHz
V
DD
= 4.9V–5.1V
* Not recommended for new designs. Contact NSC Audio Marketing.
Electrical Characteristics V
DD
= 3V
(Note 1) (Note 2)
The following specifications apply for V
DD
= 3V, for all available packages, unless otherwise specified. Limits apply for T
A
=
25˚C
LM4864
Symbol
Parameter
Conditions
Typical
(Note 6)
1.0
0.3
3
Limit
(Notes 7,
8)
3.0
2.0
Units
(Limits)
mA (max)
µA (max)
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I
DD
I
SD
Quiescent Power Supply Current
Shutdown Current
V
IN
= 0V, I
O
= 0A (Note 9)
V
PIN1
= V
DD
LM4864
Electrical Characteristics V
DD
= 3V
(Note 1) (Note 2)
(Continued)
The following specifications apply for V
DD
= 3V, for all available packages, unless otherwise specified. Limits apply for T
A
=
25˚C
LM4864
Symbol
Parameter
Conditions
Typical
(Note 6)
5
200
175
1.5
50
Limit
(Notes 7,
8)
Units
(Limits)
mV
mW
mW
%
dB
V
OS
P
O
THD+N
PSRR
Output Offset Voltage
Output Power
Total Harmonic Distortion+Noise
Power Supply Rejection Ratio
V
IN
= 0V
THD = 1% (max); f = 1 kHz; R
L
= 8Ω
THD = 1% (max); f = 1 kHz; R
L
= 16Ω
P
O
= 100 mWrms; A
VD
= 2; R
L
= 8Ω;
20 Hz
≤
f
≤
20 kHz, BW
<
80 kHz
V
DD
= 2.9V–3.1V
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 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 in the Absolute Maximum Ratings, whichever is lower. For the LM4864, T
JMAX
= 150˚C.
The typical junction-to-ambient thermal resistance, when board mounted, is 230˚C/W for package number MUA08A, 170˚C/W for package number M08A and is
107˚C/W for package number N08E
*
.
Note 4:
Human body model, 100pF discharged through a 1.5kΩ resistor.
Note 5:
Machine Model, 220pF – 240pF discharged through all pins.
Note 6:
Typicals are measured at 25˚C and represent the parametric norm.
Note 7:
Limits are guaranteed to National’s AOQL (Average Outgoing Quality Level).
Note 8:
Datasheet min/max specification limits are guaranteed by design, test, or statistical analysis.
Note 9:
The quiescent power supply current depends on the offset voltage when a practical load is connected to the amplifier.
Note 10:
The MUA08BA package is thermally limited to 595 mW of power dissipation at room temperature. Refering to the Power Dissipation vs Output Power
graph in the
Typical Performance Characteristics
section, the power dissipation limitation for the package occurs at 300 mW of output power. This package
limitation is based on 25˚C ambient temperature and
θ
JA
= 210˚C. For higher output power possibilities refer to the
Power Dissipation
Section.
Note 11:
The LDA10A package has its exposed-DAP soldered to an exposed 1.2in
2
area of 1oz printed circuit board copper.
* Not recommended for new designs. Contact NSC Audio Marketing.
www.national.com
4
LM4864
External Components Description
Components
1.
2.
R
i
C
i
(Figure 1)
Functional Description
Inverting input resistance which sets the closed-loop gain in conjunction with R
F
. This resistor also forms a
high pass filter with C
i
at f
c
= 1/(2π R
i
C
I
).
Input coupling capacitor which blocks the DC voltage at the amplifier’s input terminals. Also creates a
highpass filter with R
i
at f
c
= 1/(2π R
i
C
i
). Refer to the section,
Proper Selection of External Components,
for an explanation of how to determine the value of C
i
.
Feedback resistance which sets the closed-loop gain in conjunction with R
i
.
Supply bypass capacitor which provides power supply filtering. Refer to the
Power Supply Bypassing
section for information concerning proper placement and selection of the supply bypass capacitor.
Bypass pin capacitor which provides half-supply filtering. Refer to the
Proper Selection of External
Components
for information concerning proper placement and selection of C
