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
Thermal Resistance
θ
JC
(SOP)
θ
JA
(SOP)
θ
JA
(micro SMD)
35˚C/W
150˚C/W
220˚C/W
6.0V
−65˚C to +150˚C
−0.3V to V
DD
+0.3V
Internally Limited
2500V
250V
150˚C
Operating Ratings
Temperature Range
T
MIN
≤
T
A
≤
T
MAX
Supply Voltage
−40˚C
≤
T
A
≤
85˚C
2.2V
≤
V
DD
≤
5.5V
Electrical Characteristics V
DD
= 5V
The following specifications apply for V
DD
(Notes 1, 2)
= 5V, A
V
= 2, and 8Ω load unless otherwise specified. Limits apply for T
A
= 25˚C.
LM4892
Units
(Limits)
mA (max)
mA (max)
µA (max)
1
90
4
0.8
P
o
= 0.4 W
rms
; f = 1kHz 10Hz
≤
BW
≤
80kHz
V
ripple
= 200mV sine p-p
0.1
62 (f =
217Hz) 66 (f
= 1kHz)
W
mW
V (min)
V (max)
%
Symbol
Parameter
Conditions
V
IN
= 0V, I
o
= 0A, HP sense = 0V
V
IN
= 0V, I
o
= 0A, HP sense = 5V
Vshutdown = GND (Note 8)
THD = 2% (max), f = 1kHz,
R
L
= 8Ω, HP Sense
<
0.8V
THD = 1% (max), f = 1kHz,
R
L
= 32Ω, HP Sense
>
4V
0.1
Typical
(Note 6)
4
2.5
Limit
(Note 7)
10
I
DD
I
SD
Quiescent Power Supply Current
Shutdown Current
P
o
Output Power
V
IH
V
IL
THD+N
PSSR
HP Sense high input voltage
HP Sense low input voltage
Total Harmonic Distortion+Noise
Power Supply Rejection Ratio
dB
Electrical Characteristics V
DD
= 3.3V
The following specifications apply for V
DD
(Notes 1, 2)
= 3.3V, A
V
= 2, and 8Ω load unless otherwise specified. Limits apply for T
A
= 25˚C.
LM4892
Units
(Limits)
mA (max)
mA (max)
µA (max)
W
mW
2.6
0.8
P
o
= 0.15 W
rms
; f = 1kHz 10Hz
≤
BW
≤
80kHz
3
Symbol
Parameter
Conditions
V
IN
= 0V, I
o
= 0A, HP sense = 0V
V
IN
= 0V, I
o
= 0A, HP sense = 3.3V
Vshutdown = GND (Note 8)
THD = 1% (max), f = 1kHz,
R
L
= 8Ω, HP Sense
<
0.8V
THD = 1% (max), f = 1kHz,
R
L
= 32Ω, HP Sense
>
3V
Typical
(Note 6)
3.5
2.0
0.1
0.4
35
Limit
(Note 7)
I
DD
I
SD
Quiescent Power Supply Current
Shutdown Current
P
o
Output Power
V
IH
V
IL
THD+N
HP Sense high input voltage
HP Sense low input voltage
Total Harmonic Distortion+Noise
0.1
V (min)
V (max)
%
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LM4892
Electrical Characteristics V
DD
= 3.3V
(Notes 1, 2)
The following specifications apply for V
DD
= 3.3V, A
V
= 2, and 8Ω load unless otherwise specified. Limits apply for T
A
=
25˚C. (Continued)
LM4892
Symbol
PSSR
Parameter
Power Supply Rejection Ratio
Conditions
V
ripple
= 200mV sine p-p
Typical
(Note 6)
60(f = 217Hz)
62 (f = 1kHz)
Limit
(Note 7)
Units
(Limits)
dB
Electrical Characteristics V
DD
= 2.6V
(Notes 1, 2)
The following specifications apply for V
DD
= 2.6V, A
V
= 2, and 8Ω load unless otherwise specified. Limits apply for T
A
= 25˚C.
LM4892
Symbol
Parameter
Conditions
V
IN
= 0V, I
o
= 0A, HP sense = 0V
V
IN
= 0V, I
o
= 0A, HP sense = 2.6V
Vshutdown = GND (Note 8)
THD = 1% (max), f = 1kHz,
R
L
= 8Ω, HP Sense
<
0.8V
P
o
Output Power
THD = 1% (max), f = 1kHz,
R
L
= 4Ω, HP Sense
<
0.8V
THD = 1% (max), f = 1kHz, R
L
=
32Ω, HP Sense
>
2.5V
V
IH
V
IL
THD+N
PSSR
HP Sense high input voltage
HP Sense low input voltage
Total Harmonic Distortion+Noise
Power Supply Rejection Ratio
P
o
= 0.1 W
rms
; f = 1kHz 10Hz
≤
BW
≤
80kHz
V
ripple
= 200mV sine p-p
0.1
44(f = 217Hz)
44 (f = 1kHz)
Typical
(Note 6)
I
DD
I
SD
Quiescent Power Supply Current
Shutdown Current
2.6
1.5
0.1
0.25
0.28
20
2.0
0.8
Limit
(Note 7)
Units
(Limits)
mA (max)
mA (max)
µA (max)
W
W
mW
V (min)
V (max)
%
dB
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 Absolute Maximum Ratings, whichever is lower. For the LM4892, see power derating
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
SD
by a maximum of 2µA.
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
(Figure
1)
Components
1.
2.
R
i
C
i
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 amplifiers 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
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