LM4991LDX National Semiconductor, LM4991LDX Datasheet - Page 4

• Manufacturer Part Number: LM4991LDX
• Manufacturer: National Semiconductor

Specifications of LM4991LDX

• Operational Class: Class-AB
• Audio Amplifier Output Configuration: 1-Channel Mono
• Output Power (typ): 3x1@3OhmW
• Audio Amplifier Function: Speaker
• Total Harmonic Distortion: 0.2@8Ohm@0.5W%
• 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: 64dB
• 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: LLP EP
• Lead Free Status / Rohs Status: Not Compliant

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PSRR
I
I
V
V
V
P
THD+N
PSRR
Symbol
Symbol
DD
SD
Electrical Characteristics V
The following specifications apply for V
25˚C. (Continued)
Electrical Characteristics V
The following specifications apply for V
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: All voltages are measured with respect to the ground pin, unless otherwise specified.
Note 4: The maximum power dissipation must be derated at elevated temperatures and is dictated by T
allowable power dissipation is P
For the θ
Note 5: Human body model, 100pF discharged through a 1.5kΩ resistor.
Note 6: Machine Model, 220pF–240pF discharged through all pins.
Note 7: Typicals are specified at 25˚C and represent the parametric norm.
Note 8: Limits are guaranteed to National’s AOQL (Average Outgoing Quality Level).
Note 9: The given θ
Note 10: When driving 3Ω or 4Ω loads from a 5V supply, the LM4991LD must be mounted to a circuit board.
SDIH
SDIL
OS
o
JA
’s for different packages, please see the Application Information section or the Absolute Maximum Ratings section.
Power Supply Rejection
Ratio
Quiescent Power Supply
Current
Shutdown Current
Shutdown Voltage Input High
Shutdown Voltage Input Low
Output Offset Voltage
Output Power
Total Harmonic
Distortion+Noise
Power Supply Rejection
Ratio
JA
is for an LM4991 packaged in an LDC08A with the Exposed–DAP soldered to an exposed 1in
Parameter
Parameter
DMAX
= (T
JMAX
–T
DD
DD
A
)/θ
JA
= 3V and R
= 2.6V and R
or the number given in Absolute Maximum Ratings, whichever is lower. For the LM4991, T
V
Input terminated with 10Ω,
f = 1kHz
V
V
V
THD = 1% (max), f = 1kHz
P
V
Input terminated with 10Ω,
f = 1kHz
DD
DD
RIPPLE
IN
IN
SHUTDOWN
O
RIPPLE
R
R
= 0.15W, f = 1kHz
L
L
= 0V, no Load
= 0V, R
= 3V
= 4Ω
= 8Ω
= 2.6V
= 200mV sine p-p,
= 200mV sine p-p,
L
= 8Ω unless otherwise specified. Limits apply for T
L
L
= V
Conditions
Conditions
= 8Ω unless otherwise specified. Limits apply for T
= 8Ω
(Notes 2, 3)
DD
(Notes 2, 3)
4
JMAX
, θ
JA
(Note 7)
(Note 7)
Typical
Typical
, and the ambient temperature T
400
300
0.1
0.9
68
51
2
3
1
5
0.1
2
area of 1oz printed circuit board copper.
LM4991
LM4991
(Note 8)
(Note 8)
Limit
Limit
35
A
=
A
= 25˚C.
A
. The maximum
JMAX
mA (max)
mV (max)
µA(max)
(Limits)
(Limits)
Units
Units
= 150˚C.
mW
dB
dB
%
V
V