Texas Instruments Filterless High Efficiency Stereo 1.2W Switching Audio Amplifier LM4666SDBD/NOPB LM4666SDBD/NOPB 데이터 시트
제품 코드
LM4666SDBD/NOPB
SNAS189A – MAY 2004 – REVISED MAY 2013
Electrical Characteristics V
DD
= 3V
(1) (2)
The following specifications apply for V
DD
= 3V and R
L
= 15µH + 8
Ω
+ 15µH unless otherwise specified. Limits apply for T
A
=
25°C.
LM4666
Units
Parameter
Test Conditions
(Limits)
Typ
(3)
Limit
(4) (5)
I
DD
Quiescent Power Supply Current
V
IN
= 0V, No Load
6.5
10
mA (max)
V
IN
= 0V, R
L
= 15µH + 8
Ω
+ 15µH
7.0
I
SD
Shutdown Current
V
SD
= GND
(6)
0.02
2.0
µA (max)
V
SDIH
Shutdown Voltage Input High
1.0
1.4
V (min)
V
SDIL
Shutdown Voltage Input Low
0.8
0.4
V (max)
V
GSIH
Gain Select Input High
1.0
1.4
V (min)
V
GSIL
Gain Select Input Low
0.8
0.4
V (max)
5.25
dB (min)
A
V
Closed Loop Gain
V
Gain Select
= V
DD
6
6.75
dB (max)
11.25
dB (min)
A
V
Closed Loop Gain
V
Gain Select
= GND
12
12.75
dB (max)
V
OS
Output Offset Voltage
10
35
mV (max)
T
WU
Wake-up Time
6
ms
THD = 1% (max); f = 1kHz,
P
o
Output Power
450
400
mW (min)
22kHz BW
P
O
= 100mW
RMS
/Channel,
THD+N
Total Harmonic Distortion+Noise
f
IN
= 1kHz, 22kHz BW,
0.65
%
Both channels in phase
X
TALK
Channel Separation
P
O
= 100mW
RMS
, f = 1kHz
57
dB
V
Gain Select
= V
DD
90
k
Ω
R
IN
Differential Input Resistance
V
Gain Select
= GND
60
k
Ω
V
ripple
= 100mV
RMS
sine wave,
f
RIPPLE
= 217Hz,
60
dB
Inputs terminated to AC GND
PSRR
Power Supply Rejection Ratio
V
Ripple
= 100mV
RMS
sine wave,
f
RIPPLE
= 217Hz,
65
dB
P
OUT
= 10mW,1kHz
V
Ripple
= 100mV
RMS
,
CMRR
Common Mode Rejection Ratio
48
dB
f
Ripple
= 217Hz, Input referred
SNR
Signal to Noise Ratio
P
O
= 400mW
RMS
, A-Weighted Filter
83
dB
ε
OUT
Output Noise
A-Weighted filter, V
in
= 0V
125
µV
(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 which ensure specific performance limits. This assumes that the device is within the
Operating Ratings. Specifications are not specified for parameters where no limit is given, however, the typical value is a good indication
of device performance.
which the device is functional, but do not ensure specific performance limits. Electrical Characteristics state DC and AC electrical
specifications under particular test conditions which ensure specific performance limits. This assumes that the device is within the
Operating Ratings. Specifications are not specified for parameters where no limit is given, however, the typical value is a good indication
of device performance.
(3)
Typical specifications are specified at 25°C and represent the parametric norm.
(4)
Tested limits are specified to AOQL (Average Outgoing Quality Level).
(5)
Datasheet min/max specification limits are specified by design, test, or statistical analysis.
(6)
Shutdown current is measured in a normal room environment. Exposure to direct sunlight will increase I
SD
by a maximum of 2µA. The
Shutdown pin should be driven as close as possible to GND for minimal shutdown current and to V
DD
for the best THD performance in
PLAY mode. See the
section under
for more information.
External Components Description
Components
Functional Description
1.
C
S
Supply bypass capacitor which provides power supply filtering. Refer to the
section
for information concerning proper placement and selection of the supply bypass capacitor.
2.
C
I
Input AC coupling capacitor which blocks the DC voltage at the amplifier's input terminals.
Copyright © 2004–2013, Texas Instruments Incorporated
5
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