Datasheet

LM4811
www.ti.com
SNAS119D DECEMBER 2000REVISED APRIL 2013
Electrical Characteristics
(1)(2)
The following specifications apply for V
DD
= 2.6V unless otherwise specified, limits apply to T
A
= 25°C.
LM4811
Units
Parameter Test Conditions
(Limits)
Typ
(3)
Limit
(4)
I
DD
Supply Current V
IN
= 0V, I
O
= 0A 1.0 mA
I
SD
Shutdown Current V
IN
= 0V 0.3 µA
V
OS
Output Offset Voltage V
IN
= 0V 4.0 mV
P
o
Output Power 0.1% THD+N; f = 1kHz
R
L
= 16 20 mW
R
L
= 32 16 mW
THD+N Total Harmonic Distortion P
O
= 15mW, R
L
= 32 0.6 %
f = 20Hz to 20kHz
PSRR Power Supply Rejection Ratio C
B
= 1.0µF, V
RIPPLE
= 100mV
PP
60 dB
f = 217Hz
V
IH
(CLOCK, UP/DN, SHUTDOWN) 1.4 V (min)
Input Voltage High
V
IL
(CLOCK, UP/DN, SHUTDOWN) 0.4 V (max)
Input Voltage Low
Digital Volume Range Input referred minimum gain 33 dB
Input referred maximum gain +12 dB
Digital Volume Stepsize All 16 discrete steps 3.0 dB
Stepsize Error All 16 discrete steps ±0.3 dB
ChanneltoChannel Volume All gain settings from 0.15 dB
Tracking Error 33dB to +12dB
Shutdown Attenuation Shutdown mode active 75 dB
(1) Absolute Maximum Ratings 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) Tested limits are ensured to TI's AOQL (Average Outgoing Quality Level). Datasheet min/max specification limits are ensured by design,
test, or statistical analysis.
External Components Description
Components Functional Description (See Figure 4)
This is the input coupling capacitor. It blocks the DC voltage at, and couples the input signal to, the amplifier's input
terminals. C
i
also creates a highpass filter with the internal input resistor, R
i
, at f
c
= 1/(2πR
i
C
i
). The minimum value of R
i
is
1. C
i
33k. Refer to PROPER SELECTION OF EXTERNAL COMPONENTS for an explanation of how to determine the value of
C
i
.
This is the supply bypass capacitor. It provides power supply filtering. Refer to Application Information for proper placement
2. C
S
and selection of the supply bypass capacitor.
This is the BYPASS pin capacitor. It provides half-supply filtering. Refer to PROPER SELECTION OF EXTERNAL
3. C
B
COMPONENTS for information concerning proper placement and selection of C
B
.
This is the output coupling capacitor. It blocks the DC voltage at the amplifier's output and it forms a high pass filter with R
L
4. C
O
at f
O
= 1/(2πR
L
C
O
)
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