Datasheet
LM4881
SNAS001D –SEPTEMBER 1997–REVISED MAY 2013
www.ti.com
Electrical Characteristics
(1)(2)
(continued)
The following specifications apply for V
DD
= 5V unless otherwise specified. Limits apply for T
A
= 25C.
Symbol Parameter Conditions LM4881 Units
(Limits)
Typ
(3)
Limit
(4)
P
O
Output Power THD = 0.1% (max); f = 1 kHz;
R
L
= 8Ω 200 125 mW (min)
R
L
= 16Ω 150 mW
R
L
= 32Ω 85 mW
THD + N = 10%; f = 1 kHz;
R
L
= 8Ω 300 mW
R
L
= 16Ω 200 mW
R
L
= 32Ω 110 mW
THD+N Total Harmonic Distortion + Noise R
L
= 16Ω, P
O
= 120 mWrms; 0.025 %
R
L
= 32Ω, P
O
= 75 mWrms; f = 1 0.02 %
kHz
PSRR C
B
= 1.0 µF, V
RIPPLE
= 200 mVrms, f 50 dB
= 120Hz
I
DD
Quiescent Current V
IN
= 0V, I
O
= 0A 1.1 mA
I
SD
Shutdown Current V
PIN1
= V
DD
0.7 µA
V
OS
Offset Voltage V
IN
= 0V 5 mV
P
O
Output Power THD = 1% (max); f = 1 kHz;
R
L
= 8Ω 70 mW
R
L
= 16Ω 65 mW
R
L
= 32Ω 30 mW
THD + N = 10%; f = 1 kHz;
R
L
= 8Ω 95 mW
R
L
= 16Ω 65 mW
R
L
= 32Ω 35 mW
THD+N Total Harmonic Distortion + Noise R
L
= 16Ω, P
O
= 60 mWrms; 0.2 %
R
L
= 32Ω, P
O
= 25 mWrms; f = 1 kHz 0.03 %
PSRR Power Supply Rejection Ratio C
B
= 1.0 µF, V
RIPPLE
= 200 mVrms, f 50 dB
= 100 Hz
External Components Description
(Figure 1)
Components Functional Description
1. R
i
Inverting input resistance which sets the closed-loop gain in conjuction with R
f
. This resistor also forms a
high pass filter with C
i
at f
c
= 1 / (2πR
i
C
i
).
2. C
i
Input coupling capacitor which blocks the DC voltage at the amplifier's input terminals. Also creates a
highpass filter with R
i
at f
c
= 1 / (2πR
i
C
i
). Refer to the section, Proper Selection of External Components,
for an explanation of how to determine the value of C
i
.
3. R
f
Feedback resistance which sets closed-loop gain in conjuction with R
i
.
4. C
S
Supply bypass capacitor which provides power supply filtering. Refer to the Application Information section
for proper placement and selection of the supply bypass capacitor.
5. C
B
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
B
.
6. C
O
Output coupling capacitor which blocks the DC voltage at the amplifier's output. Forms a high pass filter
with R
L
at f
O
= 1/(2πR
L
C
O
)
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