LM4911LDX National Semiconductor, LM4911LDX Datasheet - Page 5

• Manufacturer Part Number: LM4911LDX
• Description: IC AMP AUDIO PWR .145W AB 10LLP
• Manufacturer: National Semiconductor
• Series: Boomer®r
• Type: Class ABr

Specifications of LM4911LDX

• Output Type: Headphones, 2-Channel (Stereo)
• Max Output Power X Channels @ Load: 145mW x 2 @ 16 Ohm
• Voltage - Supply: 2 V ~ 5.5 V
• Features: Mute, Shutdown, Thermal Protection
• Mounting Type: Surface Mount
• Package / Case: 10-LLP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

I
I
I
P
V
PSRR
T
V
T
DD
SD
M
WU
UM
O
NO
OSD
Electrical Characteristics V
The following specifications apply for V
C.
Note 1: All voltages are measured with respect to the GND 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 TJMAX, θ
maximum allowable power dissipation is P
power derating currents for more 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: The LDA10A package has its exposed-DAP soldered to an exposed 1.2in
Note 11: The limit is guaranteed over the temperature range of –40°C to +85°C.
External Components Description
(Figure 2)
Components
1.
2.
3.
4.
5.
6.
Symbol
C
C
C
R
C
R
S
B
o
I
I
f
Inverting input resistance which sets the closed-loop gain in conjunction with R
pass filter with C
Input coupling capacitor which blocks the DC voltage at the amplifier's input terminals. Also creates a high-pass
filter with R
of how to determine the value of C
Feedback resistance which sets the closed-loop gain in conjunction with R
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 Proper
Components, for information concerning proper placement and selection of C
Output coupling capacitor which blocks the DC voltage at the amplifier's output. Forms a high pass filter with R
f
Quiescent Power Supply Current
Shutdown Current
Mute Current
Output Power
Output Noise Voltage
Power Supply Rejection Ratio
Wake Up Time from Shutdown
Output Voltage Change on
Release from Shutdown
Time to Un-Mute
o
= 1/(2
π
R
i
L
Parameter
at f
C
o
c
)
= 1/(2
i
DMAX
at f
c
= (T
DD
π
= 1/(2
R
JMAX
= 2.4V, R
i
C
i
). Refer to the section Proper Selection of External Components, for an explanation
π
DD
- T
R
A
)/ θ
i
C
= 2.4V
i
).
L
JA
i
.
= 16Ω, and C
V
V
V
THD = 1%; f = 1kHz
BW = 20 Hz to 20kHz, A-weighted
V
OCL
C-Coupled, C
C-Coupled, C
C-Coupled, C
or the number given in Absolute Maximum Ratings, whichever is lower. For the LM4911, see
IN
SHUTDOWN
MUTE
RIPPLE
= 0V, I
= V
= 200mV sine p-p
Functional Description
(Notes 1, 2)
DD
5
O
= GND
= 0A
, C-Coupled
B
O
O
O
2
Conditions
= 4.7µF unless otherwise specified. Limits apply to T
area of 1oz. Printed circuit board copper.
R = 16Ω
R = 32Ω
= 100µF
= 100µF
= 100µF
JA
i
.
, and the ambient temperature, T
B
(Note 6)
f
. This resistor also forms a high-
0.01
Typ
1.5
0.1
0.5
40
25
12
10
65
2
LM4911
(Note 7)
Limit
0.02
2.0
80
3
1
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A
mA (max)
mV (max)
. The
A
µA(max)
µA(max)
(Limits)
s (max)
Units
= 25°
mW
µV
dB
s
L
at