Datasheet

LM4951A
www.ti.com SNAS453C –AUGUST 2008–REVISED APRIL 2013
Electrical Characteristics V
DD
= 3.3V
(1)(2)
The following specifications apply for V
DD
= 3.3V, A
V-BTL
= 6dB, R
L
= 8Ω unless otherwise specified. Limits apply for T
A
=
25°C.
LM4951A
Units
Parameter Test Conditions
(Limits)
Typ
(3)
Limit
(4)
I
DD
Quiescent Power Supply Current V
IN
= 0V, I
O
= 0A, R
L
= 8Ω BTL 2.5 4.5 mA (max)
I
SD
Shutdown Current V
SHUTDOWN
= GND
(5)
0.01 2 µA (max)
V
OS
Output Offset Voltage 3 30 mV (max)
V
SDIH
Shutdown Voltage Input High 1.2 V (min)
V
SDIL
Shutdown Voltage Input Low 0.4 V (max)
T
WU
Wake-up Time C
B
= 1.0µF 25 ms
T
SD
Shutdown time C
B
= 1.0µF 10 ms (max)
THD = 1% (max); f = 1kHz
P
O
Output Power 280 230 mW (min)
R
L
= 8Ω Mono BTL
P
O
= 100mW
RMS
= 1kHz
0.07 0.5 % (max)
A
V-BTL
= 6dB
THD+N Total Harmonic Distortion + Noise
P
O
= 100mW
RMS
; f = 1kHz
0.35 %
A
V-BTL
= 26dB
A-Weighted Filter, R
i
= R
f
= 20kΩ
ε
OS
Output Noise 10 µV
Input Referred,
(6)
V
RIPPLE
= 200mV
p-p
, f = 217Hz,
PSRR Power Supply Rejection Ratio 71 61 dB (min)
C
B
= 1μF, Input Referred
(1) “Absolute Maximum Ratings” indicate limits beyond which damage to the device may occur, including inoperability and degradation of
device reliability and/or performance. Functional operation of the device and/or non-degradation at the s or other conditions beyond
those indicated in the Recommended Operating Conditions is not implied. The Recommended Operating Conditionsindicate conditions
at which the device is functional and the device should not be operated beyond such conditions. All voltages are measured with respect
to the ground pin, unless otherwise specified.
(2) The Electrical Characteristics tables list ensured specifications under the listed Recommended Operating Conditions except as
otherwise modified or specified by the Electrical Characteristics Conditions and/or Notes. Typical specifications are estimations only and
are not ensured.
(3) Typical values represent most likely parametric norms at T
A
= +25ºC, and at the Recommended Operation Conditions at the time of
product characterization and are not specified.
(4) Datasheet min/max specification limits are ensured by test or statistical analysis.
(5) Shutdown current is measured in a normal room environment. The Shutdown pin should be driven as close as possible to GND for
minimum shutdown current.
(6) Noise measurements are dependent on the absolute values of the closed loop gain setting resistors (input and feedback resistors).
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