lm4898mmx National Semiconductor Corporation, lm4898mmx Datasheet - Page 5

• Manufacturer Part Number: lm4898mmx
• Description: 1 Watt Fully Differential Audio Power Amplifier With Shutdown Select
• Manufacturer: National Semiconductor Corporation

I
I
P
THD+N
PSRR
CMRR
V
V
V
V
V
DD
SD
Symbol
o
OS
SDIH
SDIL
SDIH
SDIL
Electrical Characteristics V
The following specifications apply for V
25˚C.
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
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: Unterminated input.
Note 10: 10Ω terminated input.
Note 11: When driving 4Ω loads from a 5V supply, the LM4898LD must be mounted to a circuit board with the exposed-DAP area soldered down to a 1sq. in plane
of 1oz. copper..
External Components Description
Components
(Figure 1)
1.
2.
3.
4.
Quiescent Power Supply Current
Shutdown Current
Output Power
Total Harmonic Distortion+Noise
Power Supply Rejection Ratio
Common-Mode Rejection Ratio
Output Offset
Shutdown Voltage Input High
Shutdown Voltage Input Low
Shutdown Voltage Input High
Shutdown Voltage Input Low
C
C
R
R
S
B
i
f
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
Inverting input resistance which sets the closed-loop gain in conjunction with R
Feedback resistance which sets the closed-loop gain in conjunction with R
Parameter
DMAX
= (T
JMAX
–T
DD
A
)/θ
JA
= 3V, 8Ω load and A
or the number given in Absolute Maximum Ratings, whichever is lower.
DD
V
V
V
THD = 1% (max); f = 1kHz
LM4898, RL = 8Ω
P
V
V
V
SD Mode = GND
SD Mode = GND
SD Mode = V
SD Mode = V
IN
IN
SDMODE
o
ripple
CM
IN
= 0.25Wrms; f = 1kHz
= 3V
= 0V, no load
= 0V, R
= 0V
f = 217Hz (Note 9)
f = 1kHz (Note 9)
f = 217Hz (Note 10)
f = 1kHz (Note 10)
f = 217Hz
= 200mV
= 200mV sine p-p
= V
L
Conditions
(Notes 1, 2, 8)
= 8 Ω
SHUTDOWN
DD
DD
PP
Functional Description
5
V
= 1V/V, unless otherwise specified. Limits apply for T
= GND
JMAX
, θ
JA
(Note 6)
Typical
, and the ambient temperature T
0.35
0.03
2.5
0.1
0.8
0.6
0.8
0.6
83
84
83
83
50
4
2
i
.
LM4898
B
f
.
.
(Note 7)
Limit
5 .5
9
1
SD
by a maximum of 2µA.
A
. The maximum
www.national.com
mA (max)
µA (max)
(Limits)
A
Units
mV
=
dB
dB
W
%
V
V
V
V