lm4897mm National Semiconductor Corporation, lm4897mm Datasheet - Page 4

• Manufacturer Part Number: lm4897mm
• Description: 1.1 Watt Audio Power Amplifier With Fade-in And Fade-out
• Manufacturer: National Semiconductor Corporation

www.national.com
I
I
V
P
THD+N
PSRR
DD
SD
Symbol
OS
o
Electrical Characteristics V
The following specifications apply for the circuit shown in Figure 1 unless otherwise specified. Limits apply for T
Note 1: All voltages are measured with respect to the ground 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
curves for additional 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: Exposure to direct sunlight will increase I
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
be curtailed or the part may be permanently damaged.
Note 10: All bumps have the same thermal resistance and contribute equally when used to lower thermal resistance.
Note 11: Maximum power dissipation (P
Equation 1 shown in the Application section. It may also be obtained from the power dissipation graphs.
Quiescent Power Supply Current
Shutdown Current
Output Offset Voltage
Output Power
Total Harmonic Distortion+Noise
Power Supply Rejection Ratio
Parameter
DMAX
= (T
DMAX
JMAX
–T
) in the device occurs at an output power level significantly below full output power. P
A
DD
SD
)/θ
JA
exceeds 6V (to a max of 8V V
by a maximum of 2µA.
or the number given in Absolute Maximum Ratings, whichever is lower. For the LM4897, see power derating
DD
V
V
THD+N = 1% (max), f = 1kHz
R
P
V
C
Input terminated with 10Ω to GND
IN
shutdown
L
o
ripple
B
= 8Ω
= 0.1Wrms, f = 1kHz
= 2.6V
= 1.0µF
= 0V, 8Ω BTL
= 200mVpp sine wave,
= GND
Conditions
4
(Notes 1, 2)
DD
), then most of the excess current will flow through the ESD protection circuits.
JMAX
55 (f = 1kHz)
55 (f =
217Hz)
, θ
JA
(Note 6)
Typical
, and the ambient temperature T
250
3.5
0.1
0.1
4
LM4897
DD
is above 6V, circuit performance will
(Notes 7, 8)
DMAX
Limit
30
7
2
can be calculated using
A
A
= 25˚C.
. The maximum
mA (max)
mV (max)
mW (min)
µA (max)
(Limits)
Units
dB
%