LM4889MMX National Semiconductor, LM4889MMX Datasheet - Page 4

• Manufacturer Part Number: LM4889MMX
• Manufacturer: National Semiconductor

Specifications of LM4889MMX

• Operational Class: Class-AB
• Audio Amplifier Output Configuration: 1-Channel Mono
• Output Power (typ): 1x1@8OhmW
• Audio Amplifier Function: Speaker
• Total Harmonic Distortion: 0.1@8Ohm@400mW%
• Single Supply Voltage (typ): 3/5V
• Dual Supply Voltage (typ): Not RequiredV
• Power Supply Requirement: Single
• Rail/rail I/o Type: No
• Power Supply Rejection Ratio: 75dB
• Single Supply Voltage (min): 2.2V
• Single Supply Voltage (max): 5.5V
• Dual Supply Voltage (min): Not RequiredV
• Dual Supply Voltage (max): Not RequiredV
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 8
• Package Type: MSOP
• Lead Free Status / Rohs Status: Not Compliant

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I
I
P
THD+N
PSRR
DD
SD
Symbol
0
Electrical Characteristics V
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
allowable power dissipation is P
currents for additional information.
Note 4: Human body model, 100 pF discharged through a 1.5 kΩ resistor.
Note 5: Machine Model, 220 pF–240 pF 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: For micro SMD only, shutdown current is measured in a Normal Room Environment. Exposure to direct sunlight will increase I
Note 9: Datasheet min/max specification limits are guaranteed by design, test or statistical analysis.
Note 10: All bumps have the same thermal resistance and contribute equally when used to lower thermal resistance. The LM4889ITL demo board (views featured
in the Application Information section) has two inner layers, one for V
and aid in spreading heat due to power dissipation within the IC.
External Components Description
(Figure 1)
Components
1.
2.
3.
4.
5.
Quiescent Power Supply Current
Shutdown Current
Output Power ( 8Ω )
Output Power ( 4Ω )
Total Harmonic Distortion+Noise
Power Supply Rejection Ratio
C
C
R
C
R
S
B
i
i
f
Inverting input resistance which sets the closed-loop gain in conjunction with R
pass filter with C
Input coupling capacitor which blocks the DC voltage at the amplifiers input terminals. Also creates a highpass filter
with R
how to determine the value of C
Feedback resistance which sets the closed-loop gain in conjunction with R
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 section, Proper Selection of External
Components, for information concerning proper placement and selection of C
Parameter
i
at f
DMAX
c
= (T
= 1/(2π R
JMAX
i
at f
–T
A
C
i
)/θ
C
= 1/(2π R
i
JA
). Refer to the section, Proper Selection of External Components, for an explanation of
or the number given in Absolute Maximum Ratings, whichever is lower. For the LM4889, see power derating
DD
V
V
V
THD = 1% (max); f = 1 kHz
THD = 1% (max); f = 1 kHz
P
V
f
f
ripple
ripple
IN
IN
shutdown
o
ripple
i
C
i
.
= 2.6V
= 0.1Wrms; f = 1kHz
i
= 0V, I
= 0V, I
).
= 217Hz
= 1kHz
= 200mV sine p-p
= GND (Note 8)
DD
o
o
and one for GND. The planes each measure 600mils x 600mils (15.24mm x 15.24mm)
= 0A, no Load
= 0A, with BTL Load
Conditions
Functional Description
4
JMAX
, θ
JA
(Note 6)
Typical
, and the ambient temperature T
0.01
0.22
0.08
2.6
3.0
0.2
44
44
i
. A
VD
B
LM4889
f
. This resistor also forms a high
.
= 2*(R
(Notes 7, 9)
f
/R
Limit
i
6
6
2
).
SD
by a maximum of 2µA.
A
. The maximum
mA (max)
mA (max)
µA (max)
(Limits)
Units
dB
dB
W
W
%