Datasheet

LM4853
www.ti.com SNAS155E –JANUARY 2002–REVISED MAY 2013
Electrical Characteristics
(1)(2)
The following specifications apply for V
DD
= 2.7V, T
A
= 25°C unless otherwise specified.
Symbol Parameter Conditions LM4853 Units
(Limits)
Typical
(3)
Limit
(4)(5)
I
DD
Supply Current BTL Mode; V
IN
= 0V; I
O
= 0A 1.8 mA
SE Mode; V
IN
= 0V; I
O
= 0A 1.8 mA
I
SD
Shutdown Current SD Mode; V
SHUTDOWN
= V
DD
10 µA
V
OS
Output Offset Voltage BTL Mode; A
V
= 2 5.0 40 mV
BTL OUT+ to BTL OUT−
P
O
Output Power BTL Mode; R
L
= 8Ω 300 mW
THD+N = 1%
SE Mode; R
L
= 32Ω 25 mW
THD+N = 1%
V
IH
Shutdown Input Voltage High Is < 80 µA 2.0 V (min)
V
IL
Shutdown Input Voltage Low Is > 0.5mA 0.8 V (max)
(1) Absolute Maximum Rating indicate limits beyond which damage to the device may occur.
(2) All voltages are measured with respect to the ground pin, unless otherwise specified.
(3) Typical specifications are specified at +25°C and represent the most likely parametric norm.
(4) Datasheet min/max specification limits are ensured by design, test, or statistical analysis.
(5) Limits are specified to TI's AOQL ( Average Outgoing Quality Level ).
External Components Description
See Figure 3.
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/(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 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, 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 the single-
ended load R
L
at f
O
= 1/(2π R
L
C
O
).
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