Datasheet

LM4876
www.ti.com SNAS054E –FEBRUARY 2000–REVISED MAY 2013
Electrical Characteristics
(1)(2)
The following specifications apply for V
DD
= 5V unless otherwise specified. Limits apply for T
A
= 25°C.
LM4876
Units
Symbol Parameter Conditions
(Limits)
Typical
(3)
Limit
(4)
2.0 V (min)
V
DD
Supply Voltage
5.5 V (max)
I
DD
Quiescent Power Supply Current V
IN
= 0V, I
o
= 0A 6.5 10.0 mA (max)
I
SD
Shutdown Current V
PIN1
= 0V 0.01 2 µA (max)
V
OS
Output Offset Voltage V
IN
= 0V 5 50 mV (max)
THD = 0.5% (max); f = 1 kHz; R
L
= 8Ω 1.10 W (min)
P
o
Output Power 1.0
THD+N = 10%; f = 1 kHz; R
L
= 8Ω 1.5 W
THD+N P
o
= 1 Wrms; A
VD
= 2; 20 Hz ≤ f ≤ 20 0.25 %
Total Harmonic Distortion+Noise
kHz; R
L
= 8Ω
PSRR Power Supply Rejection Ratio V
DD
= 4.9V to 5.1V 65 dB
(1) All voltages are measured with respect to the ground pin, unless otherwise specified.
(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 ensure specific performance limits. Electrical Characteristics state DC and AC electrical
specifications under particular test conditions that ensure specific performance limits. This assumes that the device operates within the
Operating Ratings. Specifications are not ensured for parameters where no limit is given. The typical value, however, is a good
indication of device performance.
(3) Typicals are measured at 25°C and represent the parametric norm.
(4) Limits are ensured to AOQL (Average Outgoing Quality Level).
Electrical Characteristics V
DD
= 5/3.3/2.6V
LM4876
Units
Symbol Parameter Conditions
(Limits)
Typical
(1)
Limit
(2)
V
IH
Shutdown Input Voltage High 1.2 V(min)
V
IL
Shutdown Input Voltage Low 0.4 V(max)
(1) Typicals are measured at 25°C and represent the parametric norm.
(2) Limits are ensured to AOQL (Average Outgoing Quality Level).
External Components Description
(Figure 1)
Components Functional Description
1. R
i
Inverting input resistance which sets the closed-loop gain in conjunction with R
f
. This resistor also forms a high pass
filter with C
i
at f
C
= 1/(2π R
i
C
i
).
2. C
i
Input coupling capacitor which blocks the DC voltage at the amplifiers input terminals. Also creates a highpass filter with
R
i
at f
C
= 1/(2π R
i
C
i
). Refer to the section, SELECTING PROPER EXTERNAL COMPONENTS, for an explanation of
how to determine the value of C
i
.
3. R
f
Feedback resistance which sets the closed-loop gain in conjunction with R
i
.
4. C
S
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.
5. C
B
Bypass pin capacitor which provides half-supply filtering. Refer to the section, SELECTING PROPER EXTERNAL
COMPONENTS, for information concerning proper placement and selection of C
B
.
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