参数资料
型号: MAX97003EWP+T
厂商: Maxim Integrated Products
文件页数: 17/48页
文件大小: 0K
描述: IC AUDIO SUBSYSTEM LN 20WLP
标准包装: 2,500
类型: D 类;H 类
输出类型: 1-通道(单声道)或 2-通道(立体声)
在某负载时最大输出功率 x 通道数量: 1W x 2 @ 8 欧姆
电源电压: 2.7 V ~ 5.5 V
特点: 消除爆音,差分输入,关闭
安装类型: *
供应商设备封装: *
封装/外壳: *
包装: *
Maxim Integrated Products 24
MAX97003
High-Efficiency, Low-Noise Audio Subsystem
Dynamic Range Compressor (DRC)
The speaker amplifier features a dynamic range compres-
sor (DRC) that attenuates high-amplitude signals and
allows for a higher gain setting to be selected without
clipping the output signal. This increases the perceived
loudness of the audio signal and maintains a stable output
amplitude despite changes in input amplitude. Figure 4,
Figure 5, and Figure 6 demonstrate the benefits of using
the DRC. Each of these figures uses the same input signal.
To operate the DRC, select a threshold level, compres-
sion ratio, attack time constant, and release time through
registers 0x0A and 0x0B. When enabled, RMS signal
levels that cross above the selected DRC threshold level
are attenuated based on the selected compression ratio
(Figure 7). Attenuation is achieved by automatically mod-
ifying the speaker volume to a lower gain setting. The
user-selected gain setting is automatically restored when
the RMS signal level falls below the DRC threshold. The
attack time constant determines the time constant used
when the DRC engages. The release time determines the
time-per-step used when the DRC disengages.
Figure 4. Low-Signal to High-Signal Transition, No Clipping,
DRC Disabled
Figure 5. Low-Signal to High-Signal Transition, Increased Gain,
DRC Disabled
Figure 6. Low-Signal to High-Signal Transition, Increased Gain,
DRC Enabled
Figure 7. DRC Gain Curve
THRESHOLD
0.199 TO 0.839
0.85
∞:1
4:1
2:1
1.5:1
1:1
INPUT
(VRMS)
OUTPUT
(VRMS)
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