LM4892MMX National Semiconductor, LM4892MMX Datasheet - Page 4

• Manufacturer Part Number: LM4892MMX
• Manufacturer: National Semiconductor

Specifications of LM4892MMX

• Operational Class: Class-AB
• Audio Amplifier Output Configuration: 1-Channel Mono
• Audio Amplifier Function: Headphone/Speaker
• Total Harmonic Distortion: 0.1@8Ohm@0.4W%
• 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: 66dB
• 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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PSSR
I
I
P
V
V
THD+N
PSSR
DD
SD
Symbol
Symbol
o
IH
IL
Electrical Characteristics V
The following specifications apply for V
25˚C. (Continued)
Electrical Characteristics V
The following specifications apply for 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, 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: Datasheet min/max specification limits are guaranteed by design, test, or statistical analysis.
Note 8: For micro SMD only, shutdown current is measured in a Normal Room Environment. Exposure to direct sunlight will increase I
Note 9: The Exposed-DAP of the LDA10B package should be electrically connected to GND or an electrically isolated copper area. The LM4892LD demo board
(views featured in the Application Information section) has the Exposed-DAP connected to GND with a PCB area of 353mils x 86.7mils (8.97mm x 2.20mm) on
the copper top layer and 714.7mils x 368mils (18.15mm x 9.35mm) on the copper bottom layer.
External Components Description
Components
(Figure 1)
1.
2.
3.
Power Supply Rejection Ratio
Quiescent Power Supply Current
Shutdown Current
Output Power
HP Sense high input voltage
HP Sense low input voltage
Total Harmonic Distortion+Noise
Power Supply Rejection Ratio
R
R
C
i
i
f
Inverting input resistance which sets the closed-loop gain in conjunction with R
high pass filter with C
Input coupling capacitor which blocks the DC voltage at the amplifiers input terminals. Also creates a
highpass filter with R
for an explanation of how to determine the value of C
Feedback resistance which sets the closed-loop gain in conjunction with R
Parameter
Parameter
DMAX
= (T
JMAX
–T
A
DD
i
DD
)/θ
i
at f
at f
JA
= 3.3V, A
= 2.6V, A
c
or the number given in Absolute Maximum Ratings, whichever is lower. For the LM4892, see power derating
C
= 1/(2π R
DD
= 1/(2π R
DD
V
V
V
Vshutdown = GND (Note 8)
THD = 1% (max), f = 1kHz,
R
THD = 1% (max), f = 1kHz,
R
THD = 1% (max), f = 1kHz, R
32Ω, HP Sense
P
BW ≤ 80kHz
V
ripple
IN
IN
L
L
o
ripple
= 3.3V
= 8Ω, HP Sense
= 4Ω, HP Sense
= 0.1 W
= 2.6V
= 0V, I
= 0V, I
V
V
= 200mV sine p-p
= 200mV sine p-p
= 2, and 8Ω load unless otherwise specified. Limits apply for T
= 2, and 8Ω load unless otherwise specified. Limits apply for T
i
i
C
C
i
i
). Refer to the section, Proper Selection of External Components,
).
o
o
rms
Conditions
Conditions
= 0A, HP sense = 0V
= 0A, HP sense = 2.6V
; f = 1kHz 10Hz ≤
Functional Description
(Notes 1, 2)
4
(Notes 1, 2)
>
2.5V
<
<
0.8V
0.8V
i
.
L
=
JMAX
60(f = 217Hz)
62 (f = 1kHz)
44(f = 217Hz)
44 (f = 1kHz)
, θ
JA
(Note 6)
(Note 6)
Typical
Typical
, and the ambient temperature T
0.25
0.28
2.6
1.5
0.1
0.1
20
i
.
LM4892
LM4892
f
. This resistor also forms a
(Note 7)
(Note 7)
Limit
Limit
2.0
0.8
SD
by a maximum of 2µA.
A
. The maximum
A
A
mA (max)
mA (max)
µA (max)
(Limits)
(Limits)
V (max)
V (min)
=
= 25˚C.
Units
Units
mW
dB
dB
W
W
%