LM4910MA National Semiconductor, LM4910MA Datasheet - Page 4

• Manufacturer Part Number: LM4910MA
• Description: Output Capacitor-less Stereo 35mW Headphone Amplifier
• Manufacturer: National Semiconductor

www.national.com
I
I
V
P
THD+N
PSRR
DD
SD
OS
O
Electrical Characteristics V
The following specifications apply for V
Note 1: All voltages are measured with respect to the GND pin unless otherwise specified.
Note 2: 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 3: The maximum power dissipation must be derated at elevated temperatures and is dictated by T
allowable power dissipation is P
currents for more information.
Note 4: Human body model, 100pF discharged through a 1.5kΩ resistor.
Note 5: Machine Model, 220pF-240pF 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).
Note 8: Datasheet min/max specification limits are guaranteed by design, test, or statistical analysis.
Note 9: If the product is in shutdown mode and V
If the source impedance limits the current to a max of 10ma then the part will be protected. If the part is enabled when V
curtailed or the part may be permanently damaged.
Note 10: Human body model, 100pF discharged through a 1.5kΩ resistor, Pin 6 to ground.
External Components Description
Components
1.
2.
3.
4.
Symbol
C
R
C
R
S
I
I
f
Quiescent Power Supply Current
Standby Current
Output Offset Voltage
Output Power
Total Harmonic Distortion + Noise P
Power Supply Rejection Ratio
Inverting input resistance which sets the closed-loop gain in conjunction with R
high-pass filter with C
Input coupling capacitor which blocks the DC voltage at the amplifier’s input terminals. Also creates a
high-pass filter with R
an explanation of how to determine the value of C
Feedback resistance which sets the closed-loop gain in conjunction with R
Supply bypass capacitor which provides power supply filtering. Refer to the Power Supply Bypassing
section for information concerning proper placement and selection of the supply bypass capacitor.
DMAX
Parameter
= (T
JMAX
- T
A
DD
DD
)/ θ
i
i
at f
at f
exceeds 6V (to a max of 8V V
JA
= 2.6V, A
or the number given in Absolute Maximum Ratings, whichever is lower. For the LM4910, see power derating
c
c
DD
= 1/(2πR
= 1/(2πR
= 2.6V
V
V
V
THD = 1% (max); f = 1kHz
V
Input terminated with 10Ω to ground
IN
SHUTDOWN
O
RIPPLE
= 1, and 32Ω load unless otherwise specified. Limits apply to T
i
i
C
C
= 10mW
= 0V, 32Ω Load
i
i
).
). Refer to the section Proper Selection of External Components, for
(Figure 1)
= 200mV
Functional Description
(Notes 1, 2)
4
DD
rms
= GND
Conditions
) then most of the excess current will flow through the ESD protection circuits.
; f = 1kHz
i
.
p-p
sinewave
JMAX
, θ
JA
, and the ambient temperature, T
i
.
DD
(Note 6)
217Hz)
55 (f =
55 (f =
1kHz)
is above 6V circuit performance will be
Typ
f
3.0
0.1
0.3
13
. This resistor also forms a
5
LM4910
(Notes 7,
Limit
8)
A
. The maximum
A
mA (max)
mV (max)
µA (max)
(Limits)
= 25˚C.
Units
mW
dB
%