参数资料
型号: CS42L51-CNZR
厂商: Cirrus Logic Inc
文件页数: 25/43页
文件大小: 0K
描述: IC CODEC LOW-V 24BIT 32-QFP
标准包装: 6,000
类型: 立体声音频
数据接口: PCM 音频接口
分辨率(位): 24 b
ADC / DAC 数量: 2 / 2
三角积分调变:
动态范围,标准 ADC / DAC (db): 98 / 98
电压 - 电源,模拟: 1.8V,2.5V
电压 - 电源,数字: 1.8V,2.5V
工作温度: -10°C ~ 70°C
安装类型: 表面贴装
封装/外壳: 32-QFP
供应商设备封装: 32-QFN 裸露焊盘(5x5)
包装: 管件
配用: 598-1005-ND - BOARD EVAL FOR CS42L51 CODEC
其它名称: Q3956082
DS679F1
31
CS42L51
4.3.5
Analog Input Multiplexer
A stereo 4-to-1 analog input multiplexer selects between a line-level input source, or a mic-level input
source, depending on the PDN_PGAx and AINx_MUX[1:0] bit settings. Signals may be routed to or by-
passed around the PGA. To conserve power, the PGA’s may be powered down allowing the user to select
from multiple line-level sources and route the stereo signal directly to the ADC. When using the MIC pre-
amp, however, the PGA must be powered up.
Analog input channel B may also be used as an output for the MIC bias voltage. The MICBIAS_SEL bit
routes the bias voltage to either of two pins. The multiplexer must then select from the remainder of the
two input channels.
The ADC, PGA and MIC pre-amplifier each has an associated input resistance. When selecting between
these paths, the input resistance to the CODEC will change accordingly. Refer to the input resistance
characteristics in the Characteristic and Specification Tables for the input resistance of each path.
4.3.6
MIC & PGA Gain
The MIC-level input passes through a +16 dB or +32 dB analog gain stage prior to the input multiplexer,
allowing it to be used for microphone level signals without the need for any external gain. The PGA must
be powered up when using the MIC pre-amp.
The PGA stage provides an additional +12 dB to -3 dB of analog gain in 0.5 dB steps.
Software
Controls:
Software
Controls:
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