LM4700 National Semiconductor, LM4700 Datasheet - Page 3

• Manufacturer Part Number: LM4700
• Description: Overture Audio Power Amplifier Series 30W Audio Power Amplifier with Mute and Standby Modes
• Manufacturer: National Semiconductor

CMRR
(Note 2)
A
GBWP
e
(Note 3)
SNR
(Notes 4, 5) The following specifications are for V
ply for T
IN
VOL
Electrical Characteristics
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 (pin 7), 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 func-
tional, but do not guarantee specific performance limits. Electrical Characteristics state DC and AC electrical specifications under particular test conditions which guar-
antee 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
Note 7: Human body model, 100 pF discharged through a 1.5 k
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: V
ferential between V
Note 12: The output dropout voltage, V
formance Characteristics section.
Note 13: For a 4 load, and with
With supplies above
above
in the Application Information section.
Note 14: Preliminary engineering evaluation of
data to this point. Please contact your local National Semiconductor sales representative for more information.
JC
Symbol
= 2˚C/W (junction to case). Refer to the section, Determining the Correct Heat Sink, in the Application Information section.
(Note 2)
±
20V will only increase the internal power dissipation, not the possible output power. Increased power dissipation will require a larger heat sink as explained
A
EE
= 25˚C.
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 dif-
CC
±
Common Mode Rejection Ratio
Open Loop Voltage Gain
Gain-Bandwidth Product
Input Noise
Signal-to-Noise Ratio
20V, the LM4700 cannot deliver more than 22 watts into 4 due to current limiting of the output transistors. Thus, increasing the power supply
and V
EE
must be greater than 14V.
±
20V supplies, the LM4700 can deliver typically 22 Watts of continuous average power per channel with less than 0.1% (THD+N).
Parameter
OD
, is the supply voltage minus the clipping voltage. Refer to the Clipping Voltage vs. Supply Voltage graph in the Typical Per-
JC
for the TF package has been assessed as 2˚C/W. This is a preliminary engineering number and represents the
(Continued)
CC
= +28V, V
resistor.
V
V
R
f
IHF — A Weighting Filter
R
P
Measured at 1 kHz, R
P
Measured at 1 kHz, R
O
CC
CM
O
O
L
IN
= 100 kHz, V
= 2 k , V
= 1W, A-Weighted,
= 25W, A-Weighted
= 600
= 35V to 10V, V
= 10V to −10V, I
EE
3
(Input Referred)
= −28V with R
O
Conditions
IN
= 30V
= 50 mVrms
EE
O
S
S
= 0 mA
= 25
= 25
= −10V to −35V,
L
= 8 , unless otherwise specified. Limits ap-
(Note 9)
Typical
110
110
108
7.5
2.0
98
LM4700
(Note
Limit
10)
80
90
5
8
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MHz (min)
µV (max)
dB (min)
dB (min)
(Limits)
Units
dB
dB