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)
6.0V
−65˚C to +150˚C
−0.3V to V
DD
+0.3V
Internally Limited
2000V
200V
Junction Temperature
Thermal Resistance
θ
JA
(TM)
θ
JA
(SD)
150˚C
96.5˚C/W
56˚C/W
Operating Ratings
Temperature Range
T
MIN
≤
T
A
≤
T
MAX
Supply Voltage
−40˚C
≤
T
A
≤
85˚C
2.4V
≤
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.
LM4995
Symbol
Parameter
Conditions
V
IN
= 0V, I
o
= 0A, No Load
V
IN
= 0V, I
o
= 0A, 8Ω Load
V
SD
= V
GND
No Load
THD+N = 1% (max); f = 1 kHz
Typical
(Note 6)
I
DD
I
SD
V
OS
P
o
T
WU
THD+N
PSRR
V
SDIH
V
SDIL
Quiescent Power Supply Current
Shutdown Current
Output Offset Voltage
Output Power
Wake-up time
Total Harmonic Distortion + Noise
Power Supply Rejection Ratio
Shutdown Voltage Input High
Shutdown Voltage Input Low
P
o
= 500mW
RMS
; f = 1kHz
V
ripple
= 200mV sine p-p
Input terminated to GND
1.5
1.8
0.01
5
1.3 (TM)
1.25 (SD)
165
0.08
73 (f = 217Hz)
73 (f = 1kHz)
1.5
1.2
1
26
Limit
(Notes 7, 8)
2.5
Units
(Limits)
mA (max)
mA
µA (max)
mV (max)
W
ms
%
dB
V
V
Electrical Characteristics V
DD
= 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.
LM4995
Symbol
Parameter
Conditions
V
IN
= 0V, I
o
= 0A, No Load
V
IN
= 0V, I
o
= 0A, 8Ω Load
V
SD
= V
GND
No Load
THD+N = 1% (max); f = 1 kHz
Typical
(Note 6)
I
DD
I
SD
V
OS
P
o
T
WU
THD+N
PSRR
V
SDIH
V
SDIL
Quiescent Power Supply Current
Shutdown Current
Output Offset Voltage
Output Power
Wake-up time
Total Harmonic Distortion + Noise
Power Supply Rejection Ratio
Shutdown Voltage Input High
Shutdown Voltage Input Low
P
o
= 300mW
RMS
; f = 1kHz
V
ripple
= 200mV sine p-p
Input terminated to GND
1.3
1.6
0.01
5
625 (TM)
610 (SD)
130
0.07
75 (f = 217Hz)
76 (f = 1kHz)
1.3
1
1
26
Limit
(Notes 7, 8)
2.3
Units
(Limits)
mA (max)
mA
µA (max)
mV (max)
mW
ms
%
dB
V
V
Electrical Characteristics V
DD
= 3.6V
3
www.national.com
LM4995
Electrical Characteristics V
DD
= 3.0V
(Notes 1, 2)
The following specifications apply for the circuit shown in Figure 1, unless otherwise specified. Limits apply for T
A
= 25˚C.
LM4995
Symbol
Parameter
Conditions
V
IN
= 0V, I
o
= 0A, No Load
V
IN
= 0V, I
o
= 0A, 8Ω Load
V
SD
= V
GND
No Load
THD+N = 1% (max); f = 1 kHz
P
o
= 250mW
RMS
; f = 1kHz
V
ripple
= 200mV sine p-p
Input terminated to GND
Typical
(Note 6)
I
DD
I
SD
V
OS
P
o
T
WU
THD+N
PSRR
V
SDIH
V
SDIL
Quiescent Power Supply Current
Shutdown Current
Output Offset Voltage
Output Power
Wake-up time
Total Harmonic Distortion + Noise
Power Supply Rejection Ratio
Shutdown Voltage Input High
Shutdown Voltage Input Low
1.3
1.6
0.01
5
400
110
0.07
74 (f = 217Hz)
75 (f = 1kHz)
1.2
1
Limit
(Notes 7, 8)
Units
(Limits)
mA
mA
µA
mV
mW
ms
%
dB
V
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
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 LM4995, see power derating
curves 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:
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
OUT
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.
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
