參數(shù)資料
型號(hào): MAX97003EWP+T
廠商: Maxim Integrated Products
文件頁(yè)數(shù): 29/48頁(yè)
文件大?。?/td> 0K
描述: IC AUDIO SUBSYSTEM LN 20WLP
標(biāo)準(zhǔn)包裝: 2,500
類型: D 類;H 類
輸出類型: 1-通道(單聲道)或 2-通道(立體聲)
在某負(fù)載時(shí)最大輸出功率 x 通道數(shù)量: 1W x 2 @ 8 歐姆
電源電壓: 2.7 V ~ 5.5 V
特點(diǎn): 消除爆音,差分輸入,關(guān)閉
安裝類型: *
供應(yīng)商設(shè)備封裝: *
封裝/外殼: *
包裝: *
Maxim Integrated Products 35
MAX97003
High-Efficiency, Low-Noise Audio Subsystem
Expander (Noise Gate)
The expander/noise gate eliminates noise when no desired signal is present by attenuating peak signals that are below
the selected threshold. Attenuation is achieved by automatically modifying the headphone or speaker volume as appro-
priate. To operate the headphone or speaker expander, select an expansion threshold, expansion ratio, and attack time
in the appropriate headphone or speaker expander registers.
Table 7. Expander Registers
REGISTER
BIT
NAME
DESCRIPTION
0x0C/0x0D
7
EXPHEN/
EXPSEN
Headphone/Speaker Expansion Ratio
00 = 1:1 (disabled)
01 = 2:1
10 = 4:1
11 = J:1 (noise gate)
6
5
EXPHATK/
EXPSATK
Headphone/Speaker Expander Attack Time. Decreases volume after the signal
drops below the selected expander threshold.
4
VALUE
ATTACK TIME (ms/step)
000
001
010
011
100
101
110–111
500
350
250
100
50
25
15
3
2
EXPHTH/
EXPSTH
Headphone/Speaker Noise Gate Threshold. The expander attenuates or mutes the
output below this threshold. Thresholds are based on the PGA input signal level.
VALUE
THRESHOLD (mVP)
1
0x0
0x1
0x2
0x3
0x4
0x5
0x6
0x7
Reserved
32
20
10
8
4
2
1
0
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