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LM4756 Datasheet(PDF) 3 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part No. LM4756
Description  Dual 7W Audio Power Amplifier w/Mute, Standby and Volume Control
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Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
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Absolute Maximum Ratings (Notes 3,
4)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage
30V
Output Current
Internally Limited
Power Dissipation (Note 5)
22W
ESD Susceptibility (Note 6)
2000V
ESD Susceptibility (Note 7)
250V
Junction Temperature
150˚C
Soldering Information
T Package (10 sec)
260˚C
Storage Temperature
−40˚C to +150˚C
Input Signal Voltage Range
±3V
Operating Ratings (Notes 3, 4)
Temperature Range
T
MIN
≤ T
A
≤ T
MAX
−40˚C
≤ T
A
≤ +85˚C
Supply Voltage
15V to 28V
θ
JA (Junction to Ambient)
35˚C/W
θ
JC (Junction to Case)
1.5˚C/W
Electrical Characteristics (Notes 3, 4)
The following specifications apply for V
CC = +22V, and Volume at 0dB unless otherwise specified. Limits apply for TA = 25˚C.
Symbol
Parameter
Conditions
LM4756
Units
(Limits)
Typical
(Note 8)
Limit
(Note 9)
I
CQ
(Note 1)
Total Quiescent Power Supply Current
V
CM = 0V, Vo = 0V, Io = 0 mA
20
mA (min)
80
140
mA (max)
I
STBY
(Note 1)
Standby Current
V
STDBY = 5V, Standby-on
7
10
mA (max)
I
MUTE
Mute Current
V
MUTE = 5V Mute-on
13
20
mA
A
M
(Note 2)
Mute Attenuation
V
MUTE = 5V, VSTDBY = 0V. Mute-on
Signal Input
75
60
dB (min)
V
MUTE = 0V. VSTDBY = 0V. Mute-off
2 Vrms
±5dB
Volume Attenuation Range
80
70
dB (min)
Volume Absolute Attenuation
Line-out
Pin 3 @ 0V=80dB, 2V=14dB,
3V=8dB, 4V=3dB, 5V=0dB
±3
±5
dB (max)
Line-out Offset Voltage
20
55
mV (max)
P
O
(Note 1)
Output Power (Continuous Average)
THD+N = 10% (max)
f = 1 kHz, R
L =4
Ω,V
CC = 18V
7
W
f = 1 kHz, R
L =8
Ω,V
CC = 22V
7
6.0
W(min)
THD+N
(Note 2)
Total Harmonic Distortion Plus Noise
P
o =1W,f=1 kHz, RL =8
0.4
1
% (max)
Xtalk
(Note 2)
Channel Separation
f = 1 kHz, P
o = 5W, RL =8
50
dB
Power Amp Closed-Loop Gain Error
Internal Gain = 30 dB
0.5
±1
dB (max)
SR
(Note 2)
Slew Rate
V
IN = 100 mVp-p, tRISE = 2 ns, RL =8
3
V/µs
R
IN
(Note 1)
Input Impedance
32
k
I
O
(Note 1)
Output Current Limit
V
IN = 100 mV DC, tON = 1 ms, RL =1
2.5
2.0
A(min)
PSRR
(Note 2)
Power Supply Rejection Ratio
Vpin 13 AC = 1 Vrms, f = 100 Hz
50
dB
V
CM = 0V, Io =0mA
GBWP
Gain-Bandwidth Product
f
o = 100 kHz, VIN = 50 mvrms
2
MHz
Power Bandwidth
−3 dB Bandwidth at 5W
90
kHz
eVCA
out
VCA Output Noise
IHF - A Weighting Filter
R
IN =25
55
µV
e
out
Power Amp Output Noise
IHF - A Weighting Filter
R
IN =25
1.8
mV
www.national.com
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