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LM1876 Arkusz danych(PDF) 4 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Numer części LM1876
Szczegółowy opis  Dual 20W Audio Power Amplifier with Mute and Standby Modes
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Producent  NSC [National Semiconductor (TI)]
Strona internetowa  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM1876 Arkusz danych(HTML) 4 Page - National Semiconductor (TI)

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Electrical Characteristics (Notes 4, 5) (Continued)
The following specifications apply for V
CC = +22V, VEE = −22V with RL =8
Ω unless otherwise specified. Limits apply for T
A =
25˚C.
Symbol
Parameter
Conditions
LM1876
Units
(Limits)
Typical
Limit
(Note 9)
(Note 10)
CMRR
Common Mode Rejection Ratio
V
CC = 35V to 10V, VEE = −10V to −35V,
110
80
dB (min)
(Note 2)
V
CM = 10V to −10V, IO =0 mA
A
VOL
(Note 2)
Open Loop Voltage Gain
R
L =2 k
Ω, ∆ V
O = 20 V
110
90
dB (min)
GBWP
Gain Bandwidth Product
f
O = 100 kHz, VIN = 50 mVrms
7.5
5
MHz (min)
e
IN
Input Noise
IHF — A Weighting Filter
2.0
8
µV (max)
(Note 3)
R
IN = 600
Ω (Input Referred)
SNR
Signal-to-Noise Ratio
P
O = 1W, A — Weighted,
98
dB
Measured at 1 kHz, R
S =25
P
O = 15W, A — Weighted
108
dB
Measured at 1 kHz, R
S =25
A
M
Mute Attenuation
Pin 6,11 at 2.5V
115
80
dB (min)
Standby
Pin
V
IL
Standby Low Input Voltage
Not in Standby Mode
0.8
V (max)
V
IH
Standby High Input Voltage
In Standby Mode
2.0
2.5
V (min)
Mute pin
V
IL
Mute Low Input Voltage
Outputs Not Muted
0.8
V (max)
V
IH
Mute High Input Voltage
Outputs Muted
2.0
2.5
V (min)
Note 1: Operation is guaranteed up to 64V, however, distortion may be introduced from SPiKe Protection Circuitry if proper thermal considerations are not taken
into account. Refer to the Application Information section for a complete explanation.
Note 2: DC Electrical Test; Refer to Test Circuit #1.
Note 3: AC Electrical Test; Refer to Test Circuit #2.
Note 4: All voltages are measured with respect to the GND pins (5, 10), unless otherwise specified.
Note 5: 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 which
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 6: For operating at case temperatures above 25˚C, the device must be derated based on a 150˚C maximum junction temperature and a thermal resistance
of
θJC = 2˚C/W (junction to case) for the TF package and θJC = 1˚C/W for the T package. Refer to the section Determining the Correct Heat Sink in the Application
Information section.
Note 7: Human body model, 100 pF discharged through a 1.5 k
Ω resistor.
Note 8: The operating junction temperature maximum is 150˚C, however, the instantaneous Safe Operating Area temperature is 250˚C.
Note 9: Typicals are measured at 25˚C and represent the parametric norm.
Note 10: Limits are guarantees that all parts are tested in production to meet the stated values.
Note 11: VEE must have at least −9V at its pin with reference to ground in order for the under-voltage protection circuitry to be disabled. In addition, the voltage
differential between VCC and VEE must be greater than 14V.
Note 12: The output dropout voltage, VOD, is the supply voltage minus the clipping voltage. Refer to the Clipping Voltage vs. Supply Voltage graph in the Typical
Performance Characteristics section.
Note 13: Fora4
Ω load, and with ±20V supplies, the LM1876 can deliver typically 22W of continuous average output power with less than 0.1% (THD + N). With
supplies above ±20V, the LM1876 cannot deliver more than 22W into a 4
Ω due to current limiting of the output transistors. Thus, increasing the power supply above
±20V will only increase the internal power dissipation, not the possible output power. Increased power dissipation will require a larger heat sink as explained in the
Application Information section.
www.national.com
4


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