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參數(shù)資料
| 型號(hào)： | LM4897 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | 1.1 Watt Audio Power Amplifier with Fade-In and Fade-Out |
| 中文描述： | 1.1瓦音頻功率放大器與淡入和淡出 |
| 文件頁數(shù)： | 4/14頁 |
| 文件大小： | 612K |
| 代理商： | LM4897 |
Electrical Characteristics V
DD
= 2.6V
The following specifications apply for the circuit shown in
Figure 1
unless otherwise specified. Limits apply for T
A
= 25C.
(Notes 1, 2)
Symbol
Parameter
Conditions
LM4897
Units
(Limits)
Typical
(Note 6)
3.5
0.1
4
Limit
(Notes 7, 8)
7
2
30
I
DD
I
SD
V
OS
Quiescent Power Supply Current
Shutdown Current
Output Offset Voltage
V
IN
= 0V, 8
BTL
V
shutdown
= GND
mA (max)
μA (max)
mV (max)
P
o
Output Power
THD+N = 1% (max), f = 1kHz
R
L
= 8
P
o
= 0.1Wrms, f = 1kHz
V
ripple
= 200mVpp sine wave,
C
B
= 1.0μF
Input terminated with 10
to GND
mW (min)
250
0.1
THD+N
Total Harmonic Distortion+Noise
%
PSRR
Power Supply Rejection Ratio
55 (f = 1kHz)
55 (f =
217Hz)
dB
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 andAC 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
JMAX
,
θ
JA
, and the ambient temperature T
A
. The maximum
allowable power dissipation is P
DMAX
= (T
JMAX
–T
A
)/
θ
JA
or the number given inAbsolute Maximum Ratings, whichever is lower. For the LM4897, see power derating
curves for additional information.
Note 4:
Human body model, 100pF discharged through a 1.5k
resistor.
Note 5:
Machine Model, 220pF–240pF discharged through all pins.
Note 6:
Typicals are measured at 25C 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
SD
by a maximum of 2μA.
Note 9:
If the product is in shutdown mode, and V
DD
exceeds 6V (to a max of 8V V
DD
), then most of the excess current will flow through the ESD protection circuits.
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
DD
is above 6V, circuit performance will
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
) in the device occurs at an output power level significantly below full output power. P
DMAX
can be calculated using
Equation 1 shown in the Application section. It may also be obtained from the power dissipation graphs.
L
www.national.com
4
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| LM4897MM | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:1.1 Watt Audio Power Amplifier with Fade-In and Fade-Out |
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| LM4898ITL | 制造商:Texas Instruments 功能描述:Audio Amp Speaker 1-CH Mono 1W Class-AB 9-Pin uSMD T/R |
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