LM4941SD/NOPB National Semiconductor, LM4941SD/NOPB Datasheet - Page 4

• Manufacturer Part Number: LM4941SD/NOPB
• Description: IC AMP AUDIO PWR 1.54W MONO 8LLP
• Manufacturer: National Semiconductor
• Series: Boomer®, PowerWise®r
• Type: Class ABr

Specifications of LM4941SD/NOPB

• Output Type: 1-Channel (Mono)
• Max Output Power X Channels @ Load: 1.54W x 1 @ 8 Ohm
• Voltage - Supply: 2.4 V ~ 5.5 V
• Features: Depop, Differential Inputs, Shutdown, Thermal Protection
• Mounting Type: Surface Mount
• Package / Case: 8-LLP
• Operational Class: Class-AB
• Audio Amplifier Output Configuration: 1-Channel Mono
• Output Power (typ): 1.54x1@8OhmW
• Audio Amplifier Function: Speaker
• Total Harmonic Distortion: 0.04@8Ohm@0.7W%
• 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: 95dB
• Single Supply Voltage (min): 2.4V
• 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
• Amplifier Class: AB
• No. Of Channels: 1
• Output Power: 1.25W
• Supply Voltage Range: 2.4V To 5.5V
• Load Impedance: 8ohm
• Operating Temperature Range: -40°C To +85°C
• Amplifier Case Style: LLP
• Rohs Compliant: Yes
• For Use With: LM4941SDBD - BOARD EVALUATION LM4941
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LM4941SD; LM4941SDTR

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I
I
P
THD+N
PSRR
CMRR
V
V
V
T
DD
SD
Symbol
WU
O
OS
SDIH
SDIL
Electrical Characteristics 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
allowable power dissipation is P
derating curve 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: 10Ω terminated input.
Note 10: Data taken with Bandwidth = 80kHz, A
Note 11: Maximum Power Dissipation (P
Equation 3 shown in the Application section. It may also be obtained from the Power Dissipation graphs.
External Components Description
(Figure 1)
Components
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 Voltage
Shutdown Voltage Input High
Shutdown Voltage Input Low
Wake-up Time from Shutdown
C
C
R
R
S
B
F
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
Inverting input resistance which sets the closed-loop gain in conjunction with R
External feedback resistance which sets the closed-loop gain in conjunction with R
Parameter
DMAX
= (T
DMAX
JMAX
) in the device occurs at an output power level significantly below full output power. P
– T
V
A
= 1V/V and inputs are AC-coupled except where specified.
) / θ
JA
DD
or the number given in Absolute Maximum Ratings, whichever is lower. For the LM4941, see power
V
V
V
THD+N = 1% (max); f = 1 kHz
THD+N = 10% (max); f = 1 kHz
P
V
f = 217Hz, V
V
C
IN
IN
SHDN
O
RIPPLE
IN
BYPASS
R
R
= 3V
= 0.25W; f = 1kHz
= 0V, no load
= 0V
= 0V, R
f = 217Hz (Note 9)
f = 1kHz (Note 9)
L
L
= 8Ω
= 8Ω
= GND
= 200mV
= 1μF
L
Conditions
CM
= 8Ω
Functional Description
= 200mV
4
PP
Sine
PP
Sine
JMAX
, θ
JA
(Note 6)
Typical
, and the ambient temperature T
0.43
0.54
0.05
1.6
1.6
0.1
95
90
70
2
8
B
LM4941
F
.
.
i
.
(Notes 7, 8)
DMAX
Limit
2.2
0.8
1.4
0.4
6
can be calculated using
A
. The maximum
mA (max)
mV (max)
µA (max)
(Limits)
V (max)
V (min)
Units
mA
ms
dB
dB
dB
W
W
%