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参数资料
| 型号： | CS6403-IL |
| 厂商： | CIRRUS LOGIC INC |
| 元件分类： | 编解码器 |
| 英文描述： | Echo-Cancelling Codec |
| 中文描述： | A/MU-LAW, PCM CODEC, PQCC44 |
| 封装： | PLASTIC, LCC-44 |
| 文件页数： | 34/54页 |
| 文件大小： | 761K |
| 代理商： | CS6403-IL |
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PARAMETER DEFINITION
Anti-Alias Rejection
The rejection of input frequencies in the frequency range >Fs/2 of all multiples of the input
sample rate (64 x Fs). This rejection is almost solely dependent on the external input RC.
Audible (<20kHz) Noise
The DAC audible noise floor. Measured by applying a -60dB, 1kHz sine wave. S/(N+D) is
then measured (over a Fs/2 to 20kHz bandwidth). Then add 60dB to the answer, to compensate
for the -60dB signal level.
Convergence
The process by which an echo canceller improves its path estimate, thereby improving its echo
return-loss enhancement. Convergence is complete once the echo return-loss enhancement
reaches its best value for a given environment.
Differential Nonlinearity
The worst case deviation from the ideal codewidth. Units in LSB.
ERLE
Echo signal-power reduction (Echo Return-Loss Enhancement) provided by an echo canceller.
Maximum ERLE for an echo canceller is dependent on training-signal statistics and echo-path
attributes. Units in dB.
Frequency Response
Worst case variation in output signal level versus frequency over the passband (20Hz to
0.45Fs), referenced to the level at 1kHz. Units in dB.
Instantaneous Dynamic Range
IDR is the ratio of a full-scale rms signal to the rms noise available at any instant in time,
without changing the input gain or output attenuation settings. It is measured using S/(N+D)
with a 1 kHz, -60 dB input signal, with 60 dB added to compensate for the small input signal.
Use of a small input signal reduces the harmonic distortion components to insignificance when
compared to the noise. Units in dB.
Integrated Inaudible (>20kHz) Energy
The integrated signal level on the analog output pin after a 20kHz hi-pass filter. Zero digital
input into the DAC. Units in mVrms.
Offset Error
For the ADC, the deviation of the output code from the mid-scale with the selected input at
VCM. For the DAC, the deviation of the output from VCM with mid-scale input code. Units
in LSB’s for the ADC and millivolts for the DAC.
CS6403
34
DS192PP6
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相关代理商/技术参数 |
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| CS6403-IQ | 制造商:CIRRUS 制造商全称:Cirrus Logic 功能描述:Echo-Cancelling Codec |
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