If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage (Note 10)
Storage Temperature
Input Voltage
Power Dissipation (Notes 3, 11)
ESD Susceptibility (Note 4)
ESD Susceptibility (Note 5)
Junction Temperature
Thermal Resistance
6.0V
−65˚C to +150˚C
−0.3V to V
DD
+0.3V
Internally Limited
2000V
200V
150˚C
θ
JC
(MSOP)
θ
JA
(MSOP)
θ
JA
(LLP)
θ
JC
(LLP)
Soldering Information
56˚C/W
190˚C/W
63˚C/W (Note 12)
12˚C/W (Note 12)
See AN-1187 "Leadless Leadframe Package (LLP)."
Operating Ratings
Temperature Range
T
MIN
≤
T
A
≤
T
MAX
Supply Voltage
−40˚C
≤
T
A
≤
85˚C
2.0V
≤
V
DD
≤
5.5V
(Notes 1, 2)
The following specifications apply for the circuit shown in Figure 1, unless otherwise specified. Limits apply for T
A
= 25˚C.
LM4901
Symbol
Parameter
Conditions
V
IN
= 0V, I
o
= 0A, No Load
V
IN
= 0V, I
o
= 0A, 8Ω Load
V
SD
= V
SD
V
SD
V
SD
V
SD
V
SD
MODE
MODE
MODE
MODE
Mode
Electrical Characteristics V
DD
= 5V
Typical
(Note 6)
3
4
0.1
1.5
1.3
1.5
1.3
7
8.5
Limit
(Notes 7, 8)
7
10
2.0
Units
(Limits)
mA (max)
mA (max)
µA (max)
V (min)
V (max)
V (min)
V (max)
I
DD
I
SD
V
SDIH
V
SDIL
V
SDIH
V
SDIL
V
OS
R
OUT
Quiescent Power Supply Current
Shutdown Current
Shutdown Voltage Input High
Shutdown Voltage Input Low
Shutdown Voltage Input High
Shutdown Voltage Input Low
Output Offset Voltage
Resistor Output to GND (Note 9)
Output Power (8Ω)
Wake-up time
Total Harmonic Distortion+Noise
Power Supply Rejection Ratio
= V
DD
= V
DD
= GND
= GND
50
9.7
7.0
0.9
mV (max)
kΩ (max)
kΩ (min)
W (min)
W
mS (max)
%
P
o
T
WU
THD+N
PSRR
THD = 1% (max); f = 1 kHz
1.07
1.6
100
0.2
60 (f =
217Hz)
64 (f = 1kHz)
(4Ω) (Notes 12, 13) THD = 1% (max); f = 1 kHz
P
o
= 0.5 Wrms; f = 1kHz
V
ripple
= 200mV sine p-p
Input terminated with 10Ω
55
dB (min)
(Notes 1, 2)
The following specifications apply for the circuit shown in Figure 1, unless otherwise specified. Limits apply for T
A
= 25˚C.
LM4901
Symbol
Parameter
Conditions
V
IN
= 0V, I
o
= 0A, No Load
V
IN
= 0V, I
o
= 0A, 8Ω Load
V
SD
= V
SD
V
SD
V
SD
V
SD
V
SD
MODE
MODE
MODE
MODE
Mode
Electrical Characteristics V
DD
= 3V
Typical
(Note 6)
2
3
0.1
1.1
0.9
1.3
1.0
7
8.5
Limit
(Notes 7, 8)
7
9
2.0
Units
(Limits)
mA (max)
mA (max)
µA (max)
V (min)
V (max)
V (min)
V (max)
I
DD
I
SD
V
SDIH
V
SDIL
V
SDIH
V
SDIL
V
OS
R
OUT
Quiescent Power Supply Current
Shutdown Current
Shutdown Voltage Input High
Shutdown Voltage Input Low
Shutdown Voltage Input High
Shutdown Voltage Input Low
Output Offset Voltage
Resistor Output to GND (Note 9)
= V
DD
= V
DD
= GND
= GND
50
9.7
7.0
mV (max)
kΩ (max)
kΩ (min)
3
www.national.com
LM4901
Electrical Characteristics V
DD
= 3V
(Notes 1, 2)
The following specifications apply for the circuit shown in Figure 1, unless otherwise specified. Limits apply for T
A
=
25˚C. (Continued)
LM4901
Symbol
Parameter
Output Power (8Ω)
(4Ω)
Wake-up time
Total Harmonic Distortion + Noise
Power Supply Rejection Ratio
P
o
= 0.25 Wrms; f = 1kHz
V
ripple
= 200mV sine p-p
Input terminated with 10Ω
Conditions
THD = 1% (max); f = 1 kHz
THD = 1% (max); f = 1 kHz
Typical
(Note 6)
P
o
T
WU
THD+N
PSRR
390
525
75
0.1
62 (f =
217Hz)
68 (f = 1kHz)
55
Limit
(Notes 7, 8)
Units
(Limits)
mW
mW
mS (max)
%
dB (min)
(Notes 1, 2)
The following specifications apply for the circuit shown in Figure 1, unless otherwise specified. Limits apply for T
A
= 25˚C.
LM4901
Symbol
Parameter
Conditions
V
IN
= 0V, I
o
= 0A, No Load
V
IN
= 0V, I
o
= 0A, 8Ω Load
V
SD
= V
SD
V
SD
V
SD
V
SD
V
SD
MODE
MODE
MODE
MODE
Mode
Electrical Characteristics V
DD
= 2.6V
Typical
(Note 6)
2.0
3.0
0.1
1.0
0.9
1.2
1.0
5
8.5
Limit
(Notes 7, 8)
Units
(Limits)
mA (max)
mA (max)
µA (max)
V (min)
V (max)
V (min)
V (max)
I
DD
I
SD
V
SDIH
V
SDIL
V
SDIH
V
SDIL
V
OS
R
OUT
P
o
T
WU
THD+N
PSRR
Quiescent Power Supply Current
Shutdown Current
Shutdown Voltage Input High
Shutdown Voltage Input Low
Shutdown Voltage Input High
Shutdown Voltage Input Low
Output Offset Voltage
Resistor Output to GND (Note 9)
Output Power ( 8Ω )
( 4Ω )
Wake-up time
Total Harmonic Distortion + Noise
Power Supply Rejection Ratio
= V
DD
= V
DD
= GND
= GND
50
9.7
7.0
mV (max)
kΩ (max)
kΩ (min)
mW
mS (max)
%
dB (min)
THD = 1% (max); f = 1 kHz
THD = 1% (max); f = 1 kHz
P
o
= 0.15 Wrms; f = 1kHz
V
ripple
= 200mV sine p-p
Input terminated with 10Ω
275
340
70
0.1
51 (f =
217Hz)
51 (f = 1kHz)
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 LM4901, see power derating
curves 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:
Datasheet min/max specification limits are guaranteed by design, test, or statistical analysis.
Note 9:
R
ROUT
is measured from the output pin to ground. This value represents the parallel combination of the 10kΩ output resistors and the two 20kΩ resistors.
Note 10:
If the product is in Shutdown mode and V
DD
exceeds 6V (to a max of 8V V
DD
), then most of the excess current will flow through the ESD protection circuits.
If the source impedance limits the current to a max of 10mA, then the device will be protected. If the device is enabled when V
DD
is greater than 5.5V and less than
6.5V, no damage will occur, although operation life will be reduced. Operation above 6.5V with no current limit will result in permanent damage.
Note 11:
Maximum power dissipation in the device (P
DMAX
) occurs at an output power level significantly below full output power. P
DMAX
can be calculated using
Equation 1 shown in the
Application Information
section. It may also be obtained from the power dissipation graphs.
www.national.com
4
LM4901
Electrical Characteristics V
DD
= 2.6V
(Notes 1, 2)
The following specifications apply for the circuit shown in Figure 1, unless otherwise specified. Limits apply for T
A
=
25˚C. (Continued)
Note 12:
The Exposed-DAP of the LDA10B package should be electrically connected to GND or an electrically isolated copper area. the LM4901LD demo board
(views featured in the
Application Information
section) has the Exposed-DAP connected to GND with a PCB area of 86.7mils x 585mils (2.02mm x 14.86mm) on
the copper top layer and 550mils x 710mils (13.97mm x 18.03mm) on the copper bottom layer.
Note 13:
The thermal performance of the LLP package (LM4901LD) when used with the exposed-DAP connected to a thermal plane is sufficient for driving 4Ω
loads. The LM4901LD demo board (views featured in the
Application Information
section) can drive 4Ω loads at the maximum power dissipation point (1.267W)
without thermal shutdown circuitry being activated. The other available packages do not have the thermal performance necessary for driving 4Ω loads with a 5V
supply and are not recommended for this application.
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
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 section,
Proper Selection of External
Components,
for information concerning proper placement and selection of C
