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LM4874 Datasheet(Fiches technique) 3 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Numéro de pièce LM4874
Description  2.1W Differential Input, BTL Output Stereo Audio Amplifier with Selectable Gain and Shutdown
Télécharger  21 Pages
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Fabricant  NSC [National Semiconductor (TI)]
Site Internet  http://www.national.com
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Absolute Maximum Ratings (Notes 2,
3)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage
6.0V
Storage Temperature
-65˚C to + 150˚C
Input Voltage
−0.3V to V
DD + 0.3V
Power Dissipation (Note 4)
Internally Limited
ESD Susceptibility (Note 5)
2000V
ESD Susceptibility (Note 6)
200V
Junction Temperature
150˚C
Soldering Information
Small Outline Package
Vapor Phase (60 sec.)
215˚C
Infrared (15 sec.)
220˚C
See AN-450 “Surface Mounting and their Effects on
Product Reliability” for other methods of soldering surface
mount devices.
Thermal Resistance
θ
JC (typ) MXA20A
2˚C/W
θ
JA (typ) MXA20A
41˚C/W (Note 7)
Operating Ratings
Temperature Range
T
MIN
≤ T
A
≤T
MAX
−40˚C
≤ TA ≤ 85˚C
Supply Voltage
3.0 V
≤ V
DD
≤ 5.5V
Electrical Characteristics for LM4874 (Notes 2, 8)
The following specifications applies to the LM4874 when used in the circuit shown in Figure 1 and operating with V
DD =5Vand
A
V = 6dB, unless otherwise specified. Limits apply for TA = 25˚C.
Symbol
Parameter
Conditions
LM4874
Units
(Limits)
Typical
(Note 8)
Limit
(Notes 9,
10)
V
DD
Supply Voltage
3.0
5.5
V (min)
V (max)
I
DD
Quiescent Power Supply Current
V
IN = 0V, IO = 0A, RL =
9.0
12.0
mA (max)
I
SD
Shutdown Current
V
shutdown = GND
0.1
1.0
µA (max)
V
OS
Output Offset Voltage
7
50
mV (max)
PSRR
Output Supply Rejection Ratio
V
DD = 5V, VRIPPLE = 200mVP-P
sinewave, C
BYPASS = 0.47µF,
R
L =8
62
dB
P
O
Output Power (Note 11)
THD+N = 1% (max), f = 1kHz (Note12)
R
L =3
R
L =4
R
L =8
2.1
1.9
1.2
1.0
W
W
W (min)
THD+N = 10% (max), f = 1kHz
(Note12)
R
L =3
R
L =4
R
L =8
2.6
2.6
1.5
W
W
W
THD+N
Total Harmonic Distortion + Noise
20Hz
≤ f ≤ 20kHz
R
L =4
Ω,P
O =2W
R
L =8
Ω,P
O =1W
0.3
0.3
%
%
S/N
Signal-to-Noise Ratio
f = 1kHz, C
BYPASS = 0.47µF,
P
O = 1.1W, RL =8
97
dB
R
IN
Input Resistance
Pins 5, 7, 9, and 17
See Table 1.
Note 1: An LM4874MH that has been properly mounted to a circuit board with a copper heatsink area of at least 2in2 will deliver 1.9W into 4
Ω or 2.1W into 3Ω.
Note 2: All voltages are measured with respect to the GND pin unless other wise specified.
Note 3: 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 guarantee specific performance limits. Electrical Characteristics state DC and AC electrical specifications under particular test conditions that
guarantee specific performance limits. This assumes that the device is within the Operating Ratings. Specifications are not guaranteed for parameters where no limit
is given, however, the typical value is a good indication of device performance.
Note 4: The maximum power dissipation must be derated at elevated temperatures and is dictated by TJMAX,
θJA, and the ambient temperature, TA. The maximum
allowable power dissipation is PDMAX =(TJMAX -TAJA or the number given in Absolute Maximum Ratings, whichever is lower. For the LM4874, see power derating
currents for more information.
Note 5: Human body model, 100 pF discharged through a 1.5 k
Ω resistor.
www.national.com
3




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