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LM4875 数据表(PDF) 9 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
部件名 LM4875
功能描述  Stereo 1.2W Audio Sub-system with 3D Enhancement
PDF  37 Pages
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制造商  NSC [National Semiconductor (TI)]
网页  http://www.national.com
标志 NSC - National Semiconductor (TI)

LM4875 数据表(HTML) 9 Page - National Semiconductor (TI)

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Audio Amplifier Electrical Characteristics V
DD = 3.0V (Notes 1, 2) (Continued)
The following specifications apply for V
DD = 3.0V, unless otherwise specified. Limits apply for TA = 25˚C.
Symbol
Parameter
Conditions
LM4857
Units
(Limits)
Typical
(Note 6)
Limits (Notes
7, 8)
Xtalk
Crosstalk
LD5=RD5=0
Loudspeaker; P
O= 200mW;
f = 1kHz
82
dB
Headphone; P
O= 10mW;
f = 1kHz
82
dB
T
WU
Wake-up Time
CD5=0;C
B = 2.2µF
80
ms
CD5=1;C
B = 2.2µF
140
ms
Volume Control Electrical Characteristics (Notes 1, 2)
The following specifications apply for V
DD = 5.0V and VDD = 3.0V, unless otherwise specified. Limits apply for TA = 25˚C.
Symbol
Parameter
Conditions
LM4857
Units
(Limits)
Typical
(Note 6)
Limits (Notes
7, 8)
Stereo Volume Control Range
maximum gain setting
6
5.5
6.5
dB (min)
dB (max)
minimum gain setting
-40.5
-41
-40
dB (min)
dB (max)
Mono Volume Control Range
maximum gain setting
12
11.5
12.5
dB (min)
dB (max)
minimum gain setting
-34.5
-35
-34
dB (min)
dB (max)
Volume Control Step Size
1.5
dB
Volume Control Step Size
Error
+/-0.2
+/-0.5
dB (max)
Stereo Channel to Channel
Gain Mismatch
0.3
dB
Mute Attenuation
Mode 12, V
in =1VRMS
Headphone
85
dB
Line Out
85
dB
L
IN and RIN Input Impedance
maximum gain setting
33.5
25
42
k
Ω (min)
k
Ω (max)
minimum gain setting
100
75
125
k
Ω (min)
k
Ω (max)
M
IN Input Impedance
maximum gain setting
20
15
25
k
Ω (min)
k
Ω (max)
minimum gain setting
98
73
123
k
Ω (min)
k
Ω (max)
Control Interface Electrical Characteristics (Notes 1, 2)
The following specifications apply for V
DD = 5V and VDD = 3V and 2.5V
≤ I2CV
DD
≤ 5.5V, unless otherwise specified. Limits
apply for T
A = 25˚C.
Symbol
Parameter
Conditions
LM4857
Units
(Limits)
Typical
(Note 6)
Limits (Notes
7, 8)
t
1
SCL period
2.5
µs (min)
t
2
SDA Set-up Time
100
ns (min)
t
3
SDA Stable Time
0
ns (min)
t
4
Start Condition Time
100
ns (min)
www.national.com
9



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