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參數(shù)資料
| 型號(hào)： | LM4855 |
| 廠商： | National Semiconductor Corporation |
| 元件分類： | 運(yùn)動(dòng)控制電子 |
| 英文描述： | Boomer AUDIO POWER AMPLIFIER Integrated Audio Amplifier System |
| 中文描述： | Boomer音頻功率放大器集成音頻放大器系統(tǒng) |
| 文件頁數(shù)： | 6/24頁 |
| 文件大?。?/td> | 1116K |
| 代理商： | LM4855 |
Electrical Characteristics
(Notes 2, 8) (Continued)
The following specifications apply for V
DD
= 3.0V, T
A
= 25C unless otherwise specified.
Symbol
Parameter
Conditions
LM4855
Units
(Limits)
Typical
(Note 5)
Limits
(Note 6)
Digital Volume Range (R
IN
and
L
IN
)
Input referred minimum gain
-34.5
-35.1
-33.9
11.4
12.6
dB (min)
dB (max)
dB (min)
dB (max)
dB
dB ( max)
dB (min)
dB (max)
dB (min)
k
(min)
k
(max)
k
(min)
k
(max)
k
(min)
k
(max)
k
(min)
k
(max)
k
(min)
k
(max)
C (min)
ns (min)
ns (min)
ns (min)
ns (min)
ns (min)
ns (min)
ns (min)
ns (min)
(min)
MHz (max)
Input referred maximum gain
12.0
Digital Volume Stepsize
Digital Volume Stepsize Error
Phone_In_IHF Volume
1.5
±
0.1
12
±
0.6
11.4
12.6
72
15
25
37.5
62.5
75
125
25
42
75
125
150
20
20
30
20
20
20
50
50
DC
10
BTL gain from Phone_In _IHF to
SPKR
OUT
Output Mode 2, 4, 6
Phone _In_IHF Mute Attenuation
Phone_In_IHF Input Impedance
80
20
Phone_In_HS Input Impedance
Maximum gain setting
50
Mininum gain setting
100
R
IN
and L
IN
Input Impedance
Maximum gain setting
33.5
Mininum gain setting
100
t
SD
t
ES
t
EH
t
EL
t
DS
t
DH
t
CS
t
CH
t
CL
f
CLK
Thermal Shutdown Temperature
Enable Setup Time (ENB)
Enable Hold Time (ENB)
Enable Low Time (ENB)
Data Setup Time (DATA)
Data Hold Time (DATA)
Clock Setup Time (CLK)
Clock Logic High Time (CLK)
Clock Logic Low Time (CLK)
Clock Frequency
170
Note 2:
Absolute Maximum Rating indicate limits beyond which damage to the device may occur.
Note 3:
Operating Ratings indicate conditions for which the device is functional, but do not guarantee specific performance limits. For guaranteed specifications and
test conditions, see the Electrical Characteristics. The guaranteed specifications apply only for the test conditions listed. Some performance characteristics may
degrade when the device is not operated under the listed test conditions.
Note 4:
Human body model, 100pF discharged through a 1.5k
resistor.
Note 5:
Typical specifications are specified at +25C and represent the most likely parametric norm.
Note 6:
Tested limits are guaranteed to National’s AOQL (Average Outgoing Quality Level).
Note 7:
Machine Model ESD test is covered by specification EIAJ IC-121-1981. A 200pF cap is charged to the specified voltage, then discharged directly into the
IC with no external series resistor (resistance of discharge path must be under 50
).
Note 8:
All voltages are measured with respect to the ground pin, unless otherwise specified.
Note 9:
The given
θ
JA
and
θ
JC
are for an LM4855 mounted on a demonstration board with a 4in
2
area of 1oz printed circuit board copper ground plane.
Note 10:
Please refer to the Output Noise vs Output Mode table in the Typical Performance Characteristics section for more details.
L
www.national.com
6
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