lm4834 National Semiconductor Corporation, lm4834 Datasheet - Page 3

• Manufacturer Part Number: lm4834
• Description: 1.75w Audio Power Amplifier With Dc Volume Control And Microphone Preamp
• Manufacturer: National Semiconductor Corporation

V
P
THD+N
PSRR
SNR
V
P
THD+N
PSRR
SNR
Symbol
S
O
OS
O
Electrical Characteristics for Microphone Preamp and Power
Supply
(Notes 1, 2)
The following specifications apply forV
Electrical Characteristics for Line/Headphone Amplifier
(Notes 1, 2)
The following specifications apply for V
Symbol
Electrical Characteristics for Bridged Speaker Amplifer
(Notes 1, 2)
The following specifications apply for V
Symbol
Note 1: All voltages are measured with respect to the ground pins, unlessotherwise specified. All specifications are tested using the typical application as shown
in Figure 1.
Note 2: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditionsfor which the device is
functional, but do not guarantee specific performance limits. Electrical Characteristicsstate DC and AC electrical specifications under particular test conditions which
guarantee specific performance limits. This assumes that the deviceis 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 3: The maximum power dissipation must be derated at elevated temperatures and is dictated by T
allowable power dissipation is P
mounted, is 95˚C/W assuming the MSA028CB package.
Note 4: Human body model, 100 pF discharged through a 1.5 kΩ resistor.
Note 5: Machine Model, 220 pF–240 pF discharged through all pins.
Note 6: Typicals are measured at 25˚C and represent the parametric norm.
Note 7: Limits are guaranteed to National’s AOQL (Average Outgoing Quality Level).
Mic Power Supply
Output Power
Total Harmonic Distortion+Noise
Power Supply Rejection Ratio
Signal to Noise Ratio
Output Offset Voltage
Output Power
Total Harmonic Distortion+Noise
Power Supply Rejection Ratio
Signal to Noise Ratio
(Continued)
Parameter
Parameter
Parameter
DMAX
= (T
JMAX
− T
DD
DD
DD
A
)/θ
= 5V unless otherwise noted. Limits apply for T
= 5V. Limits apply for T
= 5V, unless otherwise noted. Limits apply for T
JA
.For the LM4834MS, T
THD = 0.1%; f = 1kHz; R
THD = 10%; f = 1 kHz; R
V
R
C
V
V
A-Wtd Filter
V
THD = 0.5% (max);f = 1 kHz;
R
THD+N = 10%;f = 1 kHz; R
P
R
P
C
200 mVmrs
V
A-Wtd Filter
R
OUT
L
B
RIPPLE
DD
IN
L
O
L
O
B
DD
L
= 10kΩ, A
= 8Ω
= 8Ω, A
= 1.0 µF, f =120 Hz,
= 1W, 20 Hz
= 340 mW, R
= 1.0 µF, f = 120 Hz,V
=5V, P
= 0V
= 1 kΩ, Bias In = 2.5V
= 5V, P
= 4V
= 200 mVrms
P-P
OUT
VD
OUT
JMAX
Conditions
Conditions
3
, 20 Hz
VD
= 2
=75mW, R
Conditions
A
<
= −1
= 1.1W, R
L
= 150˚C, and the typical junction-to-ambient thermal resistance, when board
= 25˚C.
f
= 32Ω
<
<
20 kHz,
f
<
L
L
L
RIPPLE
= 32Ω
= 32Ω,
L
= 32Ω
20 kHz,
L
= 8Ω,
= 8Ω
JMAX
=
, θ
JA
58
, and the ambient temperature T
A
= 25˚C.
A
(Note 6)
(Note 6)
Typical
Typical
= 25˚C.
0.05
102
1.1
1.5
0.3
1.0
(Note 6)
70
95
30
93
Typical
5
2.5
LM4834
LM4834
LM4834
(Note 7)
(Note 7)
(Note 7)
Limit
Limit
1.0
Limit
30
2.5
A
. The maximum
www.national.com
dB
mV (max)
(Limits)
(Limits)
W (min)
(Limits)
V (min)
Units
Units
Units
mW
mW
dB
dB
dB
%
W
%
%